Abaqus碳纤维复合材料接头力学性能试验与仿真

2016-12-12 by:CAE仿真在线来源:互联网

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,记录试验过程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。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相比,差值较小,表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,失效模式一般是孔边面外拉脱。

关键词:碳纤维复合材料;力学性能;VUMAT;ABAQUS;失效模式

Abstract: The mechanical properties of T800/924 composite joints under tensile loading were studied by means of experiment and simulation analysis. The tensile test of the joint was carried out on the electronic universal testing machine. The failure process of the specimen was recorded and the final failure load was obtained. A nonlinear finite element method was used, based on the ABAQUS software platform, using the embedded material user defined subroutine (VUMAT). The finite element analysis model was established to obtain the strain distribution of the joint, and the calculated value of the joint failure load was given. The calculation prediction of the damage parts of the joint were in agreement with the experiment. The calculated values of the failure loads are small when compared with the test data. The feasibility of the simulation analysis method is proved. The result shows that hole edge is where the stress concentrated. The damage is usually initiated from hole edge. The ability of out-of-plane loaded of joint is poor. Failure mode of joint is generally the pull-out of hole edge surface.

Keywords: carbon fibre composites; mechanical property; VUMAT; ABAQUS; failure mode

作者:孙旋等,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,南京

通讯作者:童明波,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,南京

全文详见:【中国知网学术期刊】优先数字出版。

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