Calculation of the deep bending collapse response for complex thin-walled columns II. Post-collapse phase

摘要

The increasing complexity of transport vehicles means that more powerful finite element models are needed to simulate their crash behaviour. The structures cannot be effectively optimized, in terms of peak moment and energy management, by these models which require long calculation times and should only be used as a final verifying tool. Distinct kinematic models have been developed to analytically determine the resistance to collapse of thin-walled structures subjected to bending loading. Part 11 of this paper concerns tbe theoretical prediction of bending strength in the post-failure range for thin-walled structures of relatively complex geometry with a floating neutral axis position. It also concerns the validation of the proposed generalized bending kinematic model with experimental results, numerical results and results of published literature. For all cases considered, the analytical solution was shown to predict the moment-rotation relationship with an error generally below 1 5.