Abstract

This article investigates the flexural impact and damage behavior of composite sandwich beam in terms of foam core effect using the micro-computerized tomography, Micro-CT. Foam core is dominant on the damage behavior of sandwich structures. As the python scripting language was used parametric modeling, the intra-laminar damage was created with the three-dimensional explicit finite element subroutine and implemented to ABAQUS as VUMAT via FORTRAN. The results of the FEM were found to agree well with experimental observations. Notably, the change in foam core density has a very high effect on contact force levels, impact trend and damage progress.

摘要

本文利用微计算机断层扫描技术Micro-CT研究了复合夹层梁在泡沫芯效应方面的弯曲冲击和损伤行为。泡沫芯对夹层结构的损伤行为起主导作用。由于使用 python 脚本语言进行参数化建模，层内损伤是用三维显式有限元子程序创建的，并通过 FORTRAN 以 VUMAT 形式在 ABAQUS 中实现。有限元法的结果与实验观察结果吻合得很好。值得注意的是，泡沫芯密度的变化对接触力水平、冲击趋势和损伤进展有非常大的影响。