Study on tensile properties of composite laminates with gap defects

2nd International Workshop on Materials Science and Mechanical Engineering

机械制造;材料科学

Zhang, X.Z.^1 ; Bai, R.X.^1 ; Lei, Z.K.^1 ; Zhu, Y.G.^1 ; Geng, C.H.^1 ; Feng, Y.^1 ; Zhong, Z.^1 ; Wu, W.^1

State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian

116024, China^1

关键词: Comparison with experiments;    Composite laminate;    Concentration distributions;    Experimental research;    Failure criteria;    Interface damages;    Properties of composites;    Ultimate strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/504/1/012079/pdf
DOI  :  10.1088/1757-899X/504/1/012079

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The mechanical properties of composite laminates with gap defects are studied both experimentally and numerically. Based on the experimental research, a finite element model of composite laminates with gap defects is established ABAQUS software, Hashin stress failure criterion and Camanho stiffness degradationmodel is used to analyse the mechanical properties of composite laminates with gap defects under tensile load. By comparing with the results of ideal composite laminates, the influence of the existence of defects on the matrix and fibre damage and interface damage of the laminates is discussed. The feasibility and effectiveness of the finite element method are verified by comparison with experiments. The results show that the existence of gap defects under the tensile load will lead to the stress concentration distribution of laminate and reduce the ultimate strength of the laminate.