Abstract
Experimental and numerical results for clamped square mild steel plates subjected to uniformly distributed blast pressure loading are presented. The strain rate-sensitive plates exhibit mode I (large ductile deformation), mode II (tensile-tearing), and a trend towards mode III (transverse shear) failure as the load intensity increases. The numerical analysis is carried out using a new finite element formulation which incorporates nonlinear geometry and material effects as well as strain rate sensitivity. Initiation of mode II failure is predicted by a maximum strain criterion. Mode I is predicted well for both maximum deflection and deformation shape. The mode II failure prediction correlates reasonably well with the experimental results and provides a clear lower bound for full rupture of the plate.
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