Stress analysis of laminates of carbon fiber reinforced plastics, containing transverse cracks, considering free-edge effect and residual thermal stress
Stress analysis of laminates of carbon fiber reinforced plastics, containing transverse cracks, considering free-edge effect and residual thermal stress
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考虑自由边效应和残余热应力的含有横向裂纹的碳纤维增强塑料层压板的应力分析
DOI：
10.1016/j.msea.2007.11.153
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
H. Kawada
中科院分区：
文献类型：
--
作者：
A. Hosoi;H. Kawada
提出了一种变分方法来评估 [(S)/90n]s 形式的交叉层压板中的 3 维应力状态，该层压板在 90° 层中包含横向裂纹，其中 (S) 是任何正交各向异性子层压板。构造满足平衡和所有边界和界面条件的许用应力状态，并利用最小互补能原理找到复合应变能的最佳近似值。使用这种分析方法，我们可以通过考虑自由边缘效应来表达应力状态，自由边缘效应会导致裂纹层压板的边缘分层。使用该模型的计算结果与有限元方法的计算结果吻合良好。
A variational approach is presented to evaluate the 3-dimensional stress state in cross-ply laminates of the form [(S)/90n]sthat contain transverse cracks in the 90° plies, where (S) is any orthotropic sublaminate. Admissible stress states that satisfy equilibrium and all boundary and interface conditions are constructed, and the principle of minimum complementary energy is employed to find an optimal approximation of the composite strain energy. Using this method of analysis, we can express the stress state by considering the free-edge effect, which causes edge delamination in cracked laminates. The calculated results using the proposed model showed good agreement with the results calculated by the finite element method.