碳纤维复合材料接头力学性能试验与仿真分析

发布时间：2018-12-30 21:55

【摘要】：采用试验和仿真分析的方法对T800/924复合材料接头在拉伸载荷作用下的力学性能进行研究。在电子万能试验机上进行了接头试验件的拉伸试验,记录试验中试验件的破坏过程,得到了最终失效载荷。采用非线性有限元法,基于ABAQUS软件平台,使用内嵌的材料用户定义子程序(VUMAT),建立了该试验对应的有限元分析模型,得到接头的应变分布情况,并给出接头失效载荷的计算值。结果表明:计算预测接头的损伤部位与试验吻合,失效载荷计算值与试验值差值较小,证明了仿真分析方法的可行性。通过结果分析发现,孔边是应力集中的地方,破坏一般从孔边开始萌生,并且接头面外受载能力较弱,接头的失效模式一般是孔边面外拉脱。
[Abstract]:The mechanical properties of T800 / 924 composite joints under tensile load were studied by means of test and simulation. The tensile test of the joint test piece was carried out on the electronic universal testing machine. The failure process of the test piece was recorded and the final failure load was obtained. Based on the ABAQUS software platform and the embedded material user-defined subprogram (VUMAT), the finite element analysis model corresponding to the test is established by using nonlinear finite element method, and the strain distribution of the joint is obtained. The calculated values of the failure load of the joint are also given. The results show that the calculated damage location of the joint is in agreement with that of the test, and the difference between the calculated value of the failure load and the test value is small, which proves the feasibility of the simulation analysis method. Through the analysis of the results, it is found that the hole edge is the place where the stress is concentrated, the failure usually begins from the hole edge, and the out-of-plane loading capacity of the joint is relatively weak, and the failure mode of the joint is generally the out-of-plane pull off of the hole edge.
【作者单位】：南京航空航天大学飞行器先进设计技术国防重点学科实验室;成都飞机工业(集团)有限责任公司;
【基金】：国家自然科学基金(11302105) 航空科学基金(2014ZF52074)
【分类号】：TQ342.742;TB332

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