高强中模复合材料开孔层压板边缘应力分析研究
Edge Stress Analysis of High Strength Medium Modulus Composite Laminates with Openings
摘要: 针对T800级碳纤维增强复合材料开孔层压板在拉–拉疲劳试验过程中，在低应力水平下试样边缘出现大面积分层现象的工程问题，开展了开孔试样宽径比(宽度与开孔直径之比)对边缘应力集中影响的分析研究。通过数值仿真分析方法模拟了宽径比为6~10五种构型试样在拉伸载荷作用下的应力分布形式，结果表明边缘效应一直都存在，不会随着宽径比的增加而消失，但是会随着试样宽径比的增加而减弱对层间界面边缘应力集中的影响。
Abstract:
In order to solve the engineering problem of large area delamination at the edge of T800 carbon fiber reinforced composite laminate under low stress level during tensile fatigue test, the influence of width diameter ratio (the ratio of width to diameter) on the edge stress concentration was ana-lyzed. The stress distribution of five kinds of specimens with aspect ratio of 6~10 under tensile load is simulated by numerical simulation. The results show that the edge effect always exists and will not disappear with the increase of aspect ratio, but will weaken with the increase of aspect ratio.
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