Abaqus碳纖維復合材料接頭力學性能試驗與仿真

2016-12-12 by:CAE仿真在線來源:互聯網

摘要:采用試驗和仿真分析的方法對T800/924復合材料接頭在拉伸載荷作用下的力學性能進行研究。在電子萬能試驗機上進行了接頭試驗件的拉伸試驗,記錄試驗過程中試驗件的破壞過程,得到了最終失效載荷。采用非線性有限元法,基于ABAQUS軟件平臺,使用內嵌的材料用戶定義子程序(VUMAT),建立了該試驗對應的有限元分析模型,得到接頭的應變分布情況,并給出接頭失效載荷的計算值。計算預測接頭的損傷部位與試驗吻合,失效載荷計算值與試驗值相比,差值較小,表明了仿真分析方法的可行性。通過結果分析發現:孔邊是應力集中的地方,破壞一般從孔邊開始萌生,并且接頭面外受載能力較弱,失效模式一般是孔邊面外拉脫。

關鍵詞:碳纖維復合材料;力學性能;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:孫旋等,南京航空航天大學飛行器先進設計技術國防重點學科實驗室,南京

通訊作者:童明波,南京航空航天大學飛行器先進設計技術國防重點學科實驗室,南京

全文詳見:【中國知網學術期刊】優先數字出版。

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