钢-聚氨酯夹层板稳定分析

分别建立了钢-聚氨酯夹层板和普通钢板的有限元模型，在边界条件、加载情况均相同的条件下进行有限元稳定分析，夹层板采用板-实体-板结构模拟，结果表明在相同条件下，夹层板比普通钢板的屈曲强度均有较大程度的提高。同时进行了保持一定条件不变，分别改变夹芯层厚度、面层钢板厚度模拟分析，结果表明在一定范围内，夹芯层厚度与钢面板厚度增大，夹层板的屈曲临界荷载值也随之增大。夹芯层的抗弯刚度和横向剪切变形对板的影响不可忽略。

FINITE ELEMENT CALCULATION AND STRESS ANALYSIS OF STEEL-POLYURETHANE SANDWICH PANEL

Finite element models of steel panels and steel-polyurethane sandwich panels were estab- lished separately. The finite element analysis was done under the same boundary conditions and ap same loading, and the sandwich panels were simulated with shell-solid-shell structure. The results turned showed that the buckling strength of sandwich panels have greater improvements than that of steel plates. At the same time, other SPS models analysis were conducted with the same certain conditions but changed the thickness of polyurethane core layer and steel face plate, the results showed that within a certain range ,with the increasing of polyurethane core layer ply and steel face plate ply, the buckling critical load increases . And the effects of bending rigidity and transverse shear deformation of sandwich layer should not be neglected.