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- 2017
复合材料L型端框的失效行为
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Abstract:
本文将某典型复合材料结构舱体的L型端框简化为单点连接的L型端框试件，通过试验和仿真分析，对试件拉伸载荷工况下的失效形式和承载能力进行了研究。结果表明，拉伸载荷工况下，L型端框失效形式以分层和基体破坏为主，试验与仿真分析承载力偏差为10.1%，具有良好的一致性。依据研究结果，对复合材料L型端框设计进行改进，通过试验发现，连接点局部粘接金属垫片可以有效提升复合材料L型端框的拉伸承载能力。本文的研究结果可作为复合材料L型端框设计的参考。 This paper studied the mechanical behavior and load bearing capability of composite L-type frame specimen under tension loadings through experiments and FEM analysis, which can be used to predict the mechanical response of a typical composite cabin. The results show that delamination and matrix damage are the main failure modes of composite L-type frame under tension loading, and the discrepancy of load bearing capabilities basis on simulation analysis and test is acceptable, which is only 10.1%. Future research shows that better mechanical properties can be obtained by sticking metallic gaskets around the bolted holes. The results can be used as theory reference for composite L-type frame structure designing.
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