Abstract

This article intends to study the performance of sandwich panels consisting of four isotropic flat plates and three trapezoidal or sinusoidal cores. The sandwich panels, subjected to the uniform loading resting on simply supported edges, are analyzed by an analytical method based on the classical plate theory and commercially available software. The homogenization method is used for the analytical method to replace the core by a flat plate with an equivalent stiffness. Results show that the deflected shape of the equivalent sandwich plate with the flat core is similar to that of the original corrugated plate measured by using shell elements in ABAQUS. The effects of geometric characteristics on the deflection and Von-Mises’s stress are also studied by the finite element method analysis. Results show that the trapezoidal-core panel has better performance as compared to the sinusoidal-core one. Moreover, results show that the corrugation thickness and amplitude have considerable effects on the performance of the panel. A wide validity range is also obtained for the thickness of the sinusoidal-core panel as compared to the trapezoidal-core panel.

摘要

本文旨在研究由四个各向同性平板和三个梯形或正弦芯组成的夹芯板的性能。通过基于经典板理论和市售软件的分析方法对夹心板进行分析，该夹层板在简支边缘上受到均匀载荷。均化法用于解析法，用具有等效刚度的平板代替芯。结果表明，在ABAQUS中使用壳单元测得的等效平芯夹芯板的变形形状与原始波纹板的变形形状相似。还通过有限元分析研究了几何特征对挠度和Von-Mises应力的影响。结果表明，梯形核心面板与正弦核心面板相比具有更好的性能。此外，结果表明，波纹厚度和振幅对面板的性能有相当大的影响。与梯形芯板相比，正弦芯板的厚度也获得了广泛的有效性范围。