Failure analysis of variable-stiffness laminate considering manufacturing defects

2nd International Workshop on Materials Science and Mechanical Engineering

机械制造;材料科学

Zheng, Z.^1 ; Bai, R.X.^1 ; Lei, Z.K.^1 ; Zhu, Y.G.^1 ; Zhang, X.Z.^1

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

116024, China^1

关键词: Buckling loads;    Degradation model;    Fiber placement;    Manufacturing defects;    Numerical results;    Progressive failure;    Ultimate loads;    Variable stiffness;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/504/1/012055/pdf
DOI  :  10.1088/1757-899X/504/1/012055

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

For the two typical automated fiber placement manufacturing defects, namely the gap and overlap of the variable stiffness laminates, the corresponding finite element model is established. The perfect model, containing gap defect model and overlap defect model was analyzed to predict their load capacity, respectively. The progressive failure was considered by a 2D Camanho degradation model. The numerical result shows that, compared with the prefect laminate, the buckling load and ultimate load of the laminate designed by the completed overlaps strategy were improved by 10.6% and 9.3% respectively; while the buckling load and ultimate load of the laminate designed by the completed gaps strategy were reduced 16.1% and 18.5% respectively.