工艺与制造英文2024被引 2
单向纤维增强复合材料有限变形的模型预测
Model prediction of unidirectional fiber-reinforced composites under finite deformation
Xing Lu, Jianhui Wei, Wei Zhao, Wenwu Zhang, Helezi Zhou, Zinan Liu, Xiongqi Peng, Zhigao Huang, Huamin Zhou · State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
摘要整理
传统认知认为单向纤维增强复合材料（UD-FRPs）的力学模量随纤维取向角增大而单调递减。然而，本工作的数值结果与前期文献的实验结果表明，UD-FRPs的力学响应对纤维取向角呈U形依赖关系。为解释这一现象，本文建立了各向异性本构模型以捕捉UD-FRPs的力学行为。应变能分解为四个分量：基体、纤维、纤维-基体法向相互作用和剪切相互作用。通过匹配0°、45°和90°偏轴单胞的力学响应，确定各分量的贡献。模型预测结果与15°、30°、60°和75°偏轴单胞的数值模拟结果吻合良好。随着纤维取向角增大，基体分量保持不变，纤维分量递减，纤维-基体法向相互作用分量增加，纤维-基体剪切相互作用分量先增后减。应变能各分量贡献的变化规律解释了力学响应对纤维取向角U形依赖的机制。该研究对理解纤维增强复合材料的非线性力学行为具有重要意义。
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