Effect of the fiber cut angle on the shearing strength of unidirectional and cross-ply carbon-fiber-reinforced thermoplastic laminates
Effect of the fiber cut angle on the shearing strength of unidirectional and cross-ply carbon-fiber-reinforced thermoplastic laminates
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DOI：
10.1016/j.compositesb.2021.108869
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发表时间：
2021-04
期刊：
影响因子：
--
通讯作者：
K. Ogi;S. Yashiro
中科院分区：
文献类型：
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作者：
K. Ogi;S. Yashiro
本文定量地阐明了纤维切割角对碳纤维增强热塑性层合板剪切强度的影响。首先，在不同的切割角下测量单向和正交层压板的剪切强度。其次，建立了单向正交层合板剪切强度预测的两个力学模型：基于混合规则的模型和基于破坏准则的模型。混合规则模型解释了剪切角对单向层合板剪切强度的影响。破坏准则模型预测的剪切强度上的两个层压板的切割角的依赖性。最后，通过有限元分析半定量地评价了弯曲应力的辅助作用。结果表明，有效弯曲应力几乎等于从表面算起的近似一层厚度上的平均应力。
This paper quantitatively clarifies the effect of the fiber cut angle on the shearing strength of carbon-fiber-reinforced thermoplastic laminates. First, the shearing strength of the unidirectional and cross-ply laminates was measured at various cut angles. Next, two mechanics models, a rule-of-mixture-based model and a failure criterion model, were established to predict the shearing strength of the unidirectional and cross-ply laminates. The rule-of-mixture model explains the effect of the cut angle on the shearing strength of the unidirectional laminate. The failure criterion model predicts the dependence of the cut angle on the shearing strength for both laminates. Finally, finite element analysis was performed to semi-quantitatively evaluate the assistance effect of bending stress. It was revealed that the effective bending stress is almost equivalent to the stress averaged over approximately the one-layer thickness from the surface.