Strength of aluminium alloy ship plating under combined shear and compression/tension

Syrigou, MS; Benson, SD; Dow, RS

doi:10.1201/b18179-62

Strength of aluminium alloy ship plating under combined shear and compression/tension

Lookup NU author(s): Dr Maria Syrigou, Dr Simon Benson, Professor Bob Dow

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Abstract

© 2015 Taylor & Francis Group, London. This study investigates the failure modes, ultimate strength and post collapse behaviour of unstiffened aluminium plates under combined loads of shear and axial compression/tension. A nonlinear finite element method is used to model simply supported plates with restrained and unrestrained edges. The generated stress/strain curves and the interaction diagrams for combined shear and axial compression/ tension loads are presented for a range of different plate slenderness ratios and two marine grade aluminium alloys: 5083-H116 and 6082-T6. This study has been carried out with the aim of incorporating the effect of shear and torsion into the simplified progressive collapse method, which is a wellestablished approach for assessing the ultimate strength of a hull girder. The existing method is applied to ship hull girders under an assumed pure longitudinal hogging and sagging bending moment. Extending this method to incorporate the effects of shear and torsion will improve its capability for the analysis of intact and damaged ship structures built from steel and aluminium where shear and torsion may be significant.