Simply approximate estimation of local failure position of a free-free slender shell

摘要

Dynamic plastic failure characteristics of a space free-free slender shell subjected to intense dynamic loading of suddenly applied pressure unsymmetrical triangle distributed along its span was studied. Both rigid perfectly plastic (r-p-p) analytical method and finite element method based elastic perfectly plastic (e-p-p) material idealization and shell element model were adopted to predict the local failure position in the structure. It was shown that both r-p-p and e-p-p model could estimate a plastic "kink" taking place in the slender shell, which reflects the strain localization of deformation. The comparison for the position of "kink" predicted by using r-p-p and e-p-p methods is found to be reasonable good. (C) 2003 Elsevier Ltd. All rights reserved.