| 三维编织复合材料渐进损伤模拟及强度预测 |
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| 引用本文： | 张超,许希武,毛春见.三维编织复合材料渐进损伤模拟及强度预测[J].复合材料学报,2011,28(2):222-230. |
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| 作者姓名： | 张超 许希武 毛春见 |
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| 作者单位： | 南京航空航天大学 结构与强度研究所, 飞行器结构力学与控制教育部重点实验室, 南京 210016 |
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| 基金项目： | 国家自然科学基金(10672075) |
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| 摘 要： | 采用考虑纤维束相互挤压的纤维束截面八边形单胞模型, 引入周期性边界条件, 对三维编织复合材料的渐进损伤过程进行数值模拟, 并预测了材料的拉伸强度。通过在应变能密度函数中引入损伤状态变量, 建立了含损伤材料的刚度矩阵, 运用基于不同失效模式下损伤状态变量的刚度渐进折减法表征材料积分点损伤, 通过数值结果与试验结果的对比, 分析了Hashin和Tsai-Wu两种准则作为判定纤维束起始损伤的适用性。分析表明: 基于引入不同失效模式的Tsai-Wu准则的数值模拟和试验结果吻合良好; Hashin准则不适合作为编织纤维束的损伤判据; 不同编织角材料的失效机制不同。
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| 关 键 词： | 三维编织复合材料 渐进损伤 失效准则 强度预测 |
| 收稿时间： | 2010-04-03 |
Progressive damage simulation and strength prediction of 3D braided composites |
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| ZHANG Chao,XU Xiwu,MAO Chunjian.Progressive damage simulation and strength prediction of 3D braided composites[J].Acta Materiae Compositae Sinica,2011,28(2):222-230. |
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| Authors: | ZHANG Chao XU Xiwu MAO Chunjian |
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| Affiliation: | MOE Key Lab of Structure Mechanics and Control for Aircraft, Institute of Structures &|Strength, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | A representative volume element(RVE) taking account of the contact and jamming of yarns,coupled with the periodical boundary condition was chosen to simulate the progressive damage behavior of 3D braided composites.The tensile strengths were predicted from the calculated stress-strain curves.The stiffness matrix of the damaged material was established by the method of introducing damage variables to the strain energy density function.The damage evolvement method by introducing damage variables of different ... |
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| Keywords: | 3D braided composites progressive damage failure criteria strength prediction |
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