| Preface |
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xiv | |
| Acknowledgements |
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xv | |
| List of symbols and conversion factors |
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xvi | |
| 1 About aluminium |
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1 | (22) |
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1 | (2) |
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1 | (1) |
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1 | (1) |
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1.1.3 The industrial metal |
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2 | (1) |
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2 | (1) |
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2 | (1) |
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1.1.6 Supposed health risk |
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2 | (1) |
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3 | (1) |
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3 | (2) |
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1.3 Comparison with steel |
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5 | (3) |
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1.3.1 The good points about aluminium |
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6 | (1) |
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6 | (2) |
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8 | (3) |
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1.4.1 The precious metal stage |
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8 | (1) |
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1.4.2 The big breakthrough |
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9 | (1) |
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9 | (1) |
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1.4.4 Establishment of the alloys |
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10 | (1) |
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1.4.5 The first major market |
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10 | (1) |
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11 | (5) |
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11 | (1) |
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12 | (1) |
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1.5.3 Structural engineering |
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13 | (1) |
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14 | (1) |
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14 | (1) |
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15 | (1) |
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1.6 Sources of information |
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16 | (7) |
| 2 Manufacture |
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23 | (17) |
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2.1 Production of aluminium metal |
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23 | (1) |
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23 | (1) |
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24 | (1) |
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24 | (3) |
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2.2.1 Rolling mill practice |
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24 | (1) |
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25 | (1) |
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25 | (1) |
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2.2.4 Tolerance on thickness |
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25 | (1) |
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2.2.5 Special forms of flat product |
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26 | (1) |
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27 | (11) |
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27 | (1) |
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2.3.2 Heat-treatment of extrusions |
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28 | (1) |
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29 | (1) |
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29 | (2) |
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31 | (2) |
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2.3.6 Extrudability of different alloys |
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33 | (1) |
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2.3.7 Size and thickness limits |
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34 | (1) |
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35 | (1) |
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2.3.9 Design possibilities with extrusions |
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36 | (2) |
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38 | (2) |
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38 | (1) |
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38 | (1) |
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39 | (1) |
| 3 Fabrication |
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40 | (19) |
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3.1 Preparation of material |
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40 | (2) |
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40 | (1) |
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40 | (1) |
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40 | (1) |
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41 | (1) |
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42 | (1) |
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42 | (4) |
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3.2.1 Bolting and screwing |
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42 | (2) |
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3.2.2 Friction-grip bolting |
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44 | (1) |
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44 | (2) |
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46 | (4) |
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46 | (1) |
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46 | (1) |
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47 | (1) |
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48 | (1) |
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49 | (1) |
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3.4 Friction-stir welding |
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50 | (3) |
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50 | (2) |
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3.4.2 Features of FS welding |
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52 | (1) |
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52 | (1) |
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53 | (1) |
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3.5 Other welding processes |
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53 | (1) |
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53 | (3) |
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53 | (1) |
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3.6.2 Surface preparation |
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54 | (1) |
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3.6.3 Two-component adhesives |
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55 | (1) |
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3.6.4 One-component adhesives |
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55 | (1) |
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3.6.5 Applying the adhesive |
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55 | (1) |
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56 | (1) |
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56 | (1) |
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3.7 Protection and finishing |
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56 | (3) |
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3.7.1 General description |
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56 | (1) |
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57 | (1) |
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57 | (1) |
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58 | (1) |
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3.7.5 Contact with other materials |
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58 | (1) |
| 4 Aluminium alloys and their properties |
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59 | (28) |
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4.1 Numbering system for wrought alloys |
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59 | (5) |
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59 | (1) |
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4.1.2 Standardization of alloys |
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59 | (1) |
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60 | (1) |
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4.1.4 The Co and F conditions |
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61 | (1) |
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4.1.5 Relation between temper and tensile strength |
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62 | (1) |
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4.1.6 Availability of different tempers |
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63 | (1) |
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4.1.7 Heat-treated material |
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63 | (1) |
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4.2 Characteristics of the different alloy types |
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64 | (4) |
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4.2.1 Non-heat-treatable alloys |
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65 | (2) |
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4.2.2 Heat-treatable alloys |
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67 | (1) |
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4.3 Data on selected wrought alloys |
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68 | (10) |
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4.3.1 How mechanical properties are specified |
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68 | (1) |
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4.3.2 Specific alloys and their properties |
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69 | (1) |
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4.3.3 Comments on certain alloys |
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70 | (4) |
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4.3.4 Minimum bend radius |
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74 | (1) |
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4.3.5 Strength variation with temperature |
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75 | (1) |
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4.3.6 Properties of forgings |
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76 | (2) |
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78 | (2) |
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4.4.1 Empirical stress-strain relation |
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78 | (1) |
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4.4.2 Stress-strain curve for minimum strength material |
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79 | (1) |
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80 | (2) |
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80 | (1) |
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4.5.2 Three useful casting alloys |
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81 | (1) |
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4.6 Alloys used in joints |
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82 | (1) |
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82 | (1) |
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82 | (1) |
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82 | (5) |
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4.7.1 Corrosion of exposed surfaces |
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82 | (2) |
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4.7.2 When to protect against corrosion |
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84 | (1) |
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4.7.3 Bimetallic corrosion |
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85 | (2) |
| 5 Limit state design and limiting stresses |
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87 | (15) |
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87 | (7) |
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5.1.1 General description |
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87 | (1) |
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87 | (2) |
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5.1.3 Limit state of static strength |
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89 | (3) |
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5.1.4 Serviceability limit state |
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92 | (1) |
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5.1.5 Limit state of fatigue |
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93 | (1) |
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5.2 The use of limiting stresses |
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94 | (1) |
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5.3 Limiting stresses based on material properties |
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94 | (4) |
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94 | (2) |
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5.3.2 Procedure in absence of specified properties |
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96 | (1) |
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97 | (1) |
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5.4 Limiting stresses based on buckling |
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98 | (4) |
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5.4.1 General form of buckling curves |
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98 | (1) |
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5.4.2 Construction of the design curves |
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99 | (1) |
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100 | (2) |
| 6 Heat-affected zone softening at welds |
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102 | (24) |
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102 | (1) |
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103 | (1) |
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6.3 Patterns of softening |
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104 | (4) |
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6.3.1 Heat-treated material |
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104 | (1) |
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6.3.2 Work-hardened material |
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105 | (1) |
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6.3.3 Stress-strain curve of HAZ material |
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106 | (1) |
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107 | (1) |
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107 | (1) |
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6.4 Severity of HAZ softening |
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108 | (1) |
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108 | (1) |
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6.4.2 Heat-treated material |
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108 | (1) |
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6.4.3 Work-hardened material |
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109 | (1) |
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6.5 Extent of the softened zone |
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109 | (11) |
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6.5.1 General considerations |
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109 | (2) |
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111 | (1) |
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111 | (1) |
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112 | (1) |
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112 | (2) |
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6.5.6 Single straight MIG weld |
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114 | (2) |
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6.5.7 Variation of HAZ extent with weld size |
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116 | (1) |
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117 | (1) |
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118 | (1) |
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6.5.10 Definition of an isolated weld (10A-rule) |
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119 | (1) |
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6.5.11 RD method, summary |
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120 | (1) |
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6.6 Application of HAZ data to design |
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120 | (2) |
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120 | (1) |
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121 | (1) |
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6.7 Comparison with one-inch rule |
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122 | (1) |
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123 | (2) |
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6.8.1 Difference between TIG and MIG welding |
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123 | (1) |
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6.8.2 Severity of softening with TIG welding |
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124 | (1) |
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6.8.3 Extent of softened zone for TIG welding |
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125 | (1) |
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6.9 HAZ at friction-stir welds |
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125 | (1) |
| 7 Plate elements in compression |
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126 | (22) |
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126 | (2) |
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126 | (1) |
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7.1.2 Types of plate element |
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126 | (1) |
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7.1.3 Plate slenderness parameter |
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127 | (1) |
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7.1.4 Element classification (compact or slender) |
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127 | (1) |
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7.1.5 Treatment of slender elements |
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128 | (1) |
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7.2 Plain flat elements in uniform compression |
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128 | (7) |
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7.2.1 Local buckling behaviour |
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128 | (2) |
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7.2.2 Limiting values of plate slenderness |
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130 | (1) |
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7.2.3 Slender internal elements. |
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130 | (1) |
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131 | (3) |
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7.2.5 Very slender outstands |
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134 | (1) |
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7.3 Plain flat elements under strain gradient |
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135 | (6) |
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7.3.1 Internal elements under strain gradient, general description |
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135 | (1) |
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7.3.2 Internal elements under strain gradient, classification |
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136 | (2) |
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7.3.3 Slender internal elements under strain gradient |
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138 | (1) |
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7.3.4 Outstands under strain gradient, general description |
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139 | (1) |
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7.3.5 Outstands under strain gradient, case T |
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140 | (1) |
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7.3.6 Outstands under strain gradient, case R |
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140 | (1) |
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141 | (7) |
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7.4.1 General description |
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141 | (1) |
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7.4.2 Limitations on stiffener geometry |
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142 | (1) |
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7.4.3 'Standard' reinforcement |
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143 | (1) |
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7.4.4 Location of the stiffener |
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143 | (1) |
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7.4.5 Modified slenderness parameter |
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144 | (1) |
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145 | (1) |
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7.4.7 Slender reinforced elements |
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146 | (2) |
| 8 Beams |
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148 | (33) |
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148 | (1) |
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8.2 Moment resistance of the cross-section |
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149 | (8) |
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8.2.1 Moment-curvature relation |
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149 | (1) |
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8.2.2 Section classification |
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150 | (1) |
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8.2.3 Uniaxial moment, basic formulae |
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150 | (1) |
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151 | (1) |
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152 | (1) |
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8.2.6 Use of interpolation for semi-compact sections |
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152 | (1) |
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8.2.7 Semi-compact section with tongue plates |
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153 | (1) |
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8.2.8 Local buckling in an under-stressed compression flange |
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154 | (1) |
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154 | (3) |
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8.3 Shear force resistance |
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157 | (6) |
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157 | (1) |
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8.3.2 Shear yielding of webs, method 1 |
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157 | (1) |
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8.3.3 Shear yielding of webs, method 2 |
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157 | (3) |
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8.3.4 Shear resistance of bars and outstands |
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160 | (1) |
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8.3.5 Web buckling, simple method |
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160 | (1) |
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8.3.6 Web buckling, tension-field action |
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161 | (2) |
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163 | (1) |
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8.4 Combined moment and shear |
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163 | (1) |
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163 | (1) |
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8.4.2 High shear, method A |
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164 | (1) |
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8.4.3 High shear, method B |
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164 | (1) |
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164 | (2) |
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8.5.1 Webs with bearing stiffeners |
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164 | (1) |
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8.5.2 Crushing of unstiffened webs |
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165 | (1) |
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166 | (4) |
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8.6.1 Types of reinforcement |
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166 | (1) |
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166 | (1) |
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8.6.3 Transverse stiffeners |
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167 | (1) |
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168 | (2) |
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8.7 Lateral-torsional buckling |
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170 | (9) |
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8.7.1 General description |
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170 | (1) |
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171 | (1) |
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8.7.3 Equivalent uniform moment |
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171 | (1) |
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8.7.4 Limiting stress for LT buckling |
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172 | (1) |
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8.7.5 Slenderness parameter |
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173 | (3) |
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8.7.6 Beams with very slender compression flanges |
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176 | (1) |
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8.7.7 Effective length for LT buckling |
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176 | (2) |
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8.7.8 Beams of varying cross-section |
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178 | (1) |
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8.7.9 Effect of simultaneous side moment |
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179 | (1) |
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179 | (2) |
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179 | (1) |
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8.8.2 Beam of slender section |
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179 | (2) |
| 9 Tension and compression members |
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181 | (26) |
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181 | (1) |
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181 | (1) |
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9.1.2 Classification of the cross-section (compression members) |
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182 | (1) |
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182 | (2) |
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182 | (1) |
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9.2.2 Allowance for HAZ softening |
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182 | (1) |
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9.2.3 Allowance for local buckling |
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183 | (1) |
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9.2.4 Allowance for holes |
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183 | (1) |
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9.3 Localized failure of the cross-section |
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184 | (1) |
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9.4 General yielding along the length |
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184 | (1) |
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185 | (3) |
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185 | (1) |
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9.5.2 Column buckling stress |
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185 | (2) |
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9.5.3 Column buckling slenderness |
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187 | (1) |
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9.5.4 Column buckling of struts containing very slender outstands |
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188 | (1) |
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188 | (11) |
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9.6.1 General description |
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188 | (1) |
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9.6.2 Interaction with flexure |
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189 | (1) |
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190 | (1) |
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9.6.4 Sections exempt from torsional buckling |
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190 | (1) |
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191 | (1) |
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9.6.6 Torsional buckling stress |
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191 | (2) |
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9.6.7 Torsional buckling slenderness |
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193 | (1) |
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193 | (1) |
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9.6.9 Torsional buckling of struts containing very slender outstands |
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194 | (1) |
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9.6.10 Empirical slenderness formulae |
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195 | (4) |
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9.6.11 Torsional buckling of certain standardized sections |
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199 | (1) |
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9.7 Combined axial force and moment |
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199 | (8) |
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199 | (1) |
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9.7.2 Secondary bending in trusses |
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200 | (1) |
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9.7.3 Section classification |
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200 | (1) |
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9.7.4 Interaction formulae (P + uniaxial M) |
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201 | (2) |
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9.7.5 Alternative treatment (P + uniaxial M) |
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203 | (1) |
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9.7.6 Interaction formulae (P + biaxial M) |
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203 | (1) |
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9.7.7 Alternative treatment (P + biaxial M) |
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204 | (1) |
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9.7.8 Treatment of local buckling |
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205 | (1) |
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9.7.9 Eccentrically connected angles, channels and tees |
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205 | (2) |
| 10 Calculation of section properties |
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207 | (28) |
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10.1 Summary of section properties used |
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207 | (1) |
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10.2 Plastic section modulus |
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207 | (5) |
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10.2.1 Symmetrical bending |
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207 | (1) |
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10.2.2 Unsymmetrical bending |
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208 | (2) |
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10.2.3 Bending with axial force |
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210 | (1) |
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10.2.4 Plastic modulus of the effective section |
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211 | (1) |
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10.3 Elastic flexural properties |
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212 | (5) |
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10.3.1 Inertia of a section having an axis of symmetry |
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212 | (1) |
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10.3.2 Inertias for a section with no axis of symmetry |
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213 | (3) |
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10.3.3 Product of inertia |
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216 | (1) |
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10.3.4 Inertia of the effective section |
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216 | (1) |
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10.3.5 Elastic section modulus |
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217 | (1) |
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10.3.6 Radius of gyration |
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217 | (1) |
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10.4 Torsional section properties |
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217 | (8) |
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10.4.1 The torque-twist relation |
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217 | (1) |
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10.4.2 Torsion constant, basic calculation |
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218 | (1) |
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10.4.3 Torsion constant for section containing 'lumps' |
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219 | (2) |
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221 | (1) |
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222 | (1) |
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10.4.6 Special LT buckling factor |
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222 | (3) |
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10.5 Warping calculations |
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225 | (10) |
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225 | (1) |
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10.5.2 Numbering the elements |
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225 | (1) |
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10.5.3 Evaluation of warping |
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226 | (1) |
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10.5.4 Formula for the warping factor |
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227 | (1) |
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10.5.5 Bisyrrunetric and radial-symmetric sections |
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228 | (1) |
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10.5.6 Skew-symmetric sections |
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229 | (1) |
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10.5.7 Monosymmetric sections, type 1 |
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229 | (1) |
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10.5.8 Monosymmetric sections, type 2 |
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230 | (2) |
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10.5.9 Asymmetric sections |
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232 | (3) |
| 11 Joints |
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235 | (33) |
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11.1 Mechanical joints (non-torqued) |
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235 | (8) |
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235 | (1) |
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11.1.2 Basic checking procedure |
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236 | (1) |
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11.1.3 Joints in shear, fastener force arising |
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237 | (1) |
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11.1.4 Joints in shear, fastener resistance |
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238 | (2) |
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11.1.5 Joints in shear, member failure |
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240 | (1) |
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11.1.6 Joints in tension, fastener force arising |
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240 | (1) |
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11.1.7 Joints in tension, fastener resistance |
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240 | (1) |
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11.1.8 Interaction of shear and tension |
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241 | (1) |
|
|
|
241 | (2) |
|
11.1.10 Joints made with proprietary fasteners |
|
|
243 | (1) |
|
11.2 Mechanical joints (friction-grip) |
|
|
243 | (4) |
|
11.2.1 General description |
|
|
243 | (1) |
|
|
|
244 | (1) |
|
11.2.3 Ultimate limit state (shear loading) |
|
|
244 | (1) |
|
11.2.4 Serviceability limit state (shear loading) |
|
|
244 | (1) |
|
11.2.5 Bolt tension and reaction force |
|
|
245 | (1) |
|
|
|
246 | (1) |
|
11.2.7 Serviceability factor |
|
|
247 | (1) |
|
|
|
247 | (8) |
|
11.3.1 General description |
|
|
247 | (1) |
|
11.3.2 Basic checking procedure |
|
|
248 | (1) |
|
11.3.3 Weld force arising |
|
|
249 | (1) |
|
11.3.4 Calculated resistance, weld-metal failure |
|
|
250 | (2) |
|
11.3.5 Calculated resistance, fusion-boundary failure |
|
|
252 | (1) |
|
11.3.6 Welded joints carrying axial moment |
|
|
253 | (1) |
|
11.3.7 Welds under combined loading |
|
|
254 | (1) |
|
11.3.8 Friction-stir welds |
|
|
255 | (1) |
|
|
|
255 | (13) |
|
11.4.1 General description |
|
|
255 | (1) |
|
11.4.2 Specification of the adhesive |
|
|
256 | (1) |
|
11.4.3 Surface preparation |
|
|
257 | (1) |
|
11.4.4 Effect of moisture |
|
|
257 | (1) |
|
11.4.5 Factors affecting choice of adhesive |
|
|
258 | (1) |
|
|
|
259 | (1) |
|
|
|
259 | (1) |
|
11.4.8 Mechanical testing of adhesives |
|
|
259 | (1) |
|
11.4.9 Glue-line thickness |
|
|
260 | (1) |
|
11.4.10 Properties of some selected adhesives |
|
|
261 | (4) |
|
11.4.11 Resistance calculations for bonded joints |
|
|
265 | (2) |
|
11.4.12 Testing of prototype joints |
|
|
267 | (1) |
| 12 Fatigue |
|
268 | (18) |
|
|
|
268 | (2) |
|
12.2 Possible ways of handling fatigue |
|
|
270 | (1) |
|
12.3 Checking procedure (safe life) |
|
|
271 | (3) |
|
12.3.1 Constant amplitude loading |
|
|
271 | (1) |
|
12.3.2 Variable amplitude loading |
|
|
272 | (1) |
|
|
|
272 | (1) |
|
|
|
272 | (1) |
|
12.3.5 Stress-range spectrum |
|
|
273 | (1) |
|
12.4 Representative stress |
|
|
274 | (3) |
|
|
|
274 | (2) |
|
|
|
276 | (1) |
|
12.5 Classification of details |
|
|
277 | (2) |
|
12.5.1 The BS.8118 classification |
|
|
277 | (1) |
|
12.5.2 Friction-stir welds |
|
|
278 | (1) |
|
|
|
278 | (1) |
|
|
|
279 | (1) |
|
12.7 Instructions to fabricator |
|
|
280 | (1) |
|
12.8 Improvement measures |
|
|
281 | (2) |
|
|
|
283 | (3) |
|
|
|
283 | (1) |
|
12.9.2 Endurance curves for steel bolts |
|
|
283 | (1) |
|
12.9.3 Variation of bolt tension |
|
|
284 | (2) |
| References |
|
286 | (2) |
| Index |
|
288 | |