BUCKLING OF SANDWICH BEAMS USING THE EXTENDED HIGH-ORDER SANDWICH PANEL THEORY AND COMPARISON WITH ELASTICITY

摘要

The characteristics of the EHSAPT are presented. A simple case study of global buckling of a S-S sandwich beam is used to compare three higher order shear deformable theories (Allen, HSAPT, and 3 solution approach of EHSAPT) with Elasticity. All three high-order theories match Elasticity well for the SC sandwich, while the EHSAPT (Case (a) and (c)) is the only theory to predict Elasticity for MC sandwich with very thin faces. Another study of wrinkling of a S-S sandwich beam with HSAPT and EHSAPT (Case (a)) compared to Elasticity revealed that the in-plane rigidity plays a significant role in predicting high order wrinkling critical loads for very thin face sheets for soft and moderate core sandwich configurations.