| 复合材料Z-pinning工艺过程的应力松弛 |
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| 引用本文： | 朱晓光,张俊乾.复合材料Z-pinning工艺过程的应力松弛[J].上海大学学报(自然科学版),2011(6):746-750. |
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| 作者姓名： | 朱晓光 张俊乾 |
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| 作者单位： | 上海大学理学院上海市力学在能源工程中的应用重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(10772105) |
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| 摘 要： | Z-pinning增强工艺中pin针的嵌入迫使原来均匀分布的面内纤维发生局部变形,造成纤维弯曲、分布非均匀以及树脂富集区的形成,同时基于半固化环氧树脂的流变特性,面内纤维的轴向应力随着时间发生了较大变化.通过建立二维有限元模型,研究pin针植入预成形件后的面内局部纤维应力分布的规律以及应力松弛的现象.研究结果可以为z-pinned复合材料固化过程的进一步研究提供依据.
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| 关 键 词： | 复合材料层合板 粘弹性 纤维变形 应力松弛 |
Stress Relaxation in Prepreg Composites Due to Z-pinning |
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| ZHU Xiao-guang,ZHANG Jun-qian.Stress Relaxation in Prepreg Composites Due to Z-pinning[J].Journal of Shanghai University(Natural Science),2011(6):746-750. |
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| Authors: | ZHU Xiao-guang ZHANG Jun-qian |
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| Institution: | ZHU Xiao-guang,ZHANG Jun-qian(Shanghai Key Laboratory of Mechanics in Energy and Environment Engineering,College of Sciences,Shanghai University,Shanghai 200444,China) |
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| Abstract: | The microstructure of laminates is changed by z-pinning.In order to understand the fiber stress distribution in prepreg composites with insertion of z-pins,finite element analyses are conducted based upon the micromechanics model.The uncured resin matrix is modeled by viscoleastic constitutive equations.The fiber stress relaxation behavior with time is revealed. |
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| Keywords: | composites laminate viscoelastic fiber waviness stress relaxation |
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