Experimental study and finite element analysis of the elastic instability of composite lattice structures for aeronautic applications
Experimental study and finite element analysis of the elastic instability of composite lattice structures for aeronautic applications
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DOI：
10.1016/j.compstruct.2005.11.013
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发表时间：
2007-06
影响因子：
6.3
通讯作者：
E. Frulloni;J. Kenny;P. Conti;L. Torre
中科院分区：
文献类型：
--
作者：
E. Frulloni;J. Kenny;P. Conti;L. Torre
本文提出的工作是集中在网格复合材料空心结构，已受到外部静水压力的失效行为的有限元建模（FEM）。此外，开发的实验程序来测量上述电阻，并测试有限元模型。制造并测试了具有网格结构和不同几何形状的碳纤维复合材料空心圆柱体。为了开发用于这种结构的设计工具，使用有限元建模对所进行的所有实验进行计算机模拟。有限元模拟结果为进一步分析和研究其破坏机理提供了依据。因此，所研究的结构的弹性失稳进行了分析，并考虑其抗倒塌的单元几何形状的影响。作为研究的结果，它已经可以定位三种不同的故障模式，其中严格相关的长度的气缸。有限元模型能正确预测出断裂管的形状和断裂应力水平。
The work presented in this paper is focused on the finite element modelling (FEM) of the failure behaviour of lattice composite hollow structures that have been subjected to an external hydrostatic pressure. Furthermore, the development of an experimental procedure to measure the aforementioned resistance, and to test the FEM model is also presented. Carbon fibres composite hollow cylinders with a lattice structure and with different geometries were produced and tested. In order to develop a design tools for such structures, all the experiments performed were computer simulated using finite element modelling. The results obtained with FEM simulation provide further insight to analyze and investigate the failure mechanism. The elastic instability of the studied structures was therefore analyzed and the influence of element geometry on the collapsing resistance thereof was considered. As a result of the study it has been possible to locate three different failure modes which where strictly related to the length of the cylinders. Both the shape of the broken tube and the lever of failure stresses were correctly predicted by the FEM model.