ANALYSIS OF SANDWICH BEAMS BY 2D ELASTO-PLASTIC FORMULATION AND A JOINT ELEMENT

摘要

Sandwich structures are usually analysed by different methods of finite element representation. Most of them apply an ideal interface that will not collapse during deformation. As the core and the adhesive are weaker than the skins, it is expected that the performance of the adhesive will play a significant role. In this paper, it is proposed an analysis of sandwich beams that considers the plasticity of the core and of the skin. The 2D analysis considers an elasto-plastic formulation based on an associative formulation. It is proposed also the inclusion of a joint element at the skin-core interface. This element may collapse plastically, and debonding will occur. Results so far illustrate the need of such refined analysis.