Global buckling and face wrinkling response of sandwich panels under transient loads

The present study is concerned with the transient dynamic response of sandwich panels subjected to rapidly applied loads. Special interest is directed to the effect of the transverse compressibility of sandwich structures with weak core. For the analysis, a previously presented higher-order sandwich shell theory of the v. Kármán type is utilized. The structural problem is solved by means of an extended Galerkin procedure in conjunction with an explicit, variable step Runge-Kutta scheme for the transient problem. In a number of examples dealing with the transient dynamic response of sandwich structures under rapid loading conditions, it is observed that the transverse core compressibility has distinct effects even on the overall response, if face wrinkling occurs during the loading history.