ANALYSES OF WRINKLING AND BUCKLING OF ELASTIC PLATES BY DXDR METHOD

This paper deals with the wrinkling and buckling of elastic plates sub jected to in-plane and transverse external forces. With the aid of a n ewly developed dynamic relaxation method, the well-known dynamic crite rion of stability was used to predict the bifurcation point. Some typi cal components in engineering practice (i.e. annular, circular and rec tangular plates) were investigated in detail. The reliability of the m ethod for the analyses of post-wrinkling and post-buckling was demonst rated. Based on the analytical studies performed, approximate formulas for determining the critical load and number of waves in the wrinklin g mode were obtained. It found that the initial elastic wrinkling mode of plates subjected to bending was different from that of plastic wri nkling. (C) 1997 Elsevier Science Ltd.