Aluminium Design and Construction - Chapter 6 pptx

... non-heat-treatable material there is negligible dip at A, and k z3 =k z1 . 6. 4.2 Heat-treated material Table 6. 1 lists proposed k z -values for MIG-welded joints in 6xxx and 7xxx-series alloys. These have generally ... 0.8x B (6. 1b) 6. 3.2 Work-hardened material With the non-heat-treatable alloys, HAZ softening need only be consid- ered for work-hardened material; it is not a facto...

Ngày tải lên: 22/07/2014, 18:22

... machined. 4 .6 ALLOYS USED IN JOINTS 4 .6. 1 Fastener materials Chapter 11 includes design data on four typical alloys for use as fasteners, namely 60 82, 60 61, 5154A and 5056A. The first three have already ... non-heat-treatable materials. Copyright 1999 by Taylor & Francis Group. All Rights Reserved. popular alloys in the series are: 60 60 (Mg 0.5, Si 0.4, Fe 0.2) slightly we...

Ngày tải lên: 22/07/2014, 18:22

... the designer must specify fatigue-quality welding and state the necessary level of inspection (Section 3.3.5). The drawings should be marked with a ‘Fat-number’, giving the required class, and also ... Hydro -Aluminium in Norway on transverse butt welds in 60 82-T4 extruded material, 5 mm thick, suggest that class 50 might be appropriate for such a joint. This compares with class 24 for...

Ngày tải lên: 22/07/2014, 18:22

... (per bolt) and on their condition. It is given by the expression: P – f =nµR – (11.9) where n=number of friction interfaces and, µ=slip-factor (Section 11.2 .6) . 11.2.5 Bolt tension and reaction ... already been covered under member design in Chapters 8 and 9. Here we just consider A and B. 11.3.2 Basic checking procedure Looking first at the loading cases (a) and (b), the bas...

Ngày tải lên: 22/07/2014, 18:22

... are bisymmetric, radial-symmetric or skew-symmetric S coincides with G and g=0. For sections entirely composed of radiating outstand elements, such as angles and tees (‘type-R’ sections, Figure ... giving w ° =0. In all other cases, w ° is non-zero and must be calculated. Figure 10. 16 compares the warping of an I-section (bisymmetric) and a zed (skew-symmetric). With the zed it is...

Ngày tải lên: 22/07/2014, 18:22

... general expression: (9. 16) Figure 9.14 Four standardized profiles (BS. 1 161 ). Table 9.3 Properties of certain standardized shapes Notes. 1. The sections are standardized in BS 1 161 . 2. For section ... rotational restraint that the outstands may receive from the fillet material at the root. Double-angle (back-to-back) struts can also be regarded as effectively type-R. 9 .6. 4 Sections e...

Ngày tải lên: 22/07/2014, 18:22

... yield stress and the 0.2% proof stress respectively for the two materials. Typically, the diagram might be looked on as comparing mild steel and 60 82-T6 aluminium. Moment levels Zp ° and Sp ° ... field to pull on and the tension field cannot develop. Only if a proper ‘end-post’ (EP) is provided, designed as in Section 8 .6. 4, can effective tension-field action in an end-panel b...

Ngày tải lên: 22/07/2014, 18:22

... element. Stress-pattern at failure, and assumed effective section. N=non-welded, W=with edge-welds. Figure 7.5 Slender outstand. Stress- pattern at failure, and assumed effective section. N=non-welded, ... results from random effects including initial out-of-flatness and shape of the stress- strain curve. Curve E indicates the stress at which buckling would begin to occur for an ideal n...

Ngày tải lên: 22/07/2014, 18:22

... and m equal to 1.3 and 1.2 respectively, giving a minimum LFC of 1. 56. This implies that the member could just withstand a static overload of 56% before collapsing. The aim of limit state design ... appropriate scatter-band, with a cut-off at the limiting stress for the material. Local buckling of a thin-walled cross-section, as distinct from overall buckling of the member as a whole...

Ngày tải lên: 22/07/2014, 18:22

... for non-aeronautical use are usually in the stronger kind of 6xxx-series alloy. They can be either machined from T6-condition bar-stock, or forged and then artificially aged (T8-condition). Design data ... full-strength T6 condition is difficult. The 6xxx-series alloys, and even worse the 2xxx alloys, will accept very limited deformation in this condition, and such practice is forbidd...

Ngày tải lên: 22/07/2014, 18:22