Progressive fatigue damage simulation method for composites

详细信息    查看全文

• 作者：Yuri Nikishkov ; Andrew Makeev ; ^{makeev@uta.edu} ; Guillaume Seon
• 关键词：Composites ; Matrix failure ; Fatigue damage ; Finite element simulations
• 刊名：International Journal of Fatigue
• 出版年：2013
• 出版时间：March, 2013
• 年：2013
• 卷：48
• 期：Complete
• 页码：266-279
• 全文大小：2968 K

文摘

The main objective of this work is to show the ability of solid finite element-based techniques to accurately predict the onset and progression of matrix cracks and delaminations in composites under fatigue loading. The specific objectives are: (a) to develop fatigue failure simulation method for multi-directional carbon/epoxy laminate articles in a finite element code; and (b) to correlate the failure predictions with test data. The failure prediction models presented in this work use stress-based fatigue failure criteria combined with fatigue damage accumulation and are not based on initial flaw assumptions. The verification test articles include 88-ply IM7/8552 carbon/epoxy composite laminate coupons with wavy plies, and 16-ply IM7/8552 carbon/epoxy open-hole tensile coupons. Available stress-strain relations and failure progression algorithm are built in finite element models; and fatigue material properties are used to predict fatigue damage onset and progression. The fatigue model predictions and subsequent test correlations are presented.