Nonlinear two-scale shell modeling of sandwiches with a comb-like core
Nonlinear two-scale shell modeling of sandwiches with a comb-like core
复制标题
DOI：
10.1016/j.compstruct.2016.02.042
复制
发表时间：
2016-06
影响因子：
6.3
通讯作者：
Dominik Heller;F. Gruttmann
中科院分区：
文献类型：
--
作者：
Dominik Heller;F. Gruttmann
本文提出了一种梳状夹层复合材料的双尺度计算模型。在全球尺度上，夹层板用均匀有限壳单元来模拟，而在局部尺度上，代表性体积单元(RVE)描述了整个厚度范围内的夹层板的微观结构。局部模型作为壳单元在全球尺度上的本构关系来实现。由于材料响应在非线性模拟的每个迭代步骤中都被更新，因此该模型可以描述面板屈曲或塑性流动等非线性的局部效应。
In this paper a computational two-scale model for sandwich composites with a comb-like core structure is proposed. On the global scale the sandwich panel is modeled with homogenized finite shell elements, while on the local scale a representative volume element (RVE) describes the microstructure of the sandwich through the full thickness. The local model is implemented as a constitutive law for the shell elements on the global scale. As the material response is updated in each iteration step of a nonlinear simulation, local effects of nonlinearity such as face sheet buckling or plastic flow can be described by the model.