| 引用本文: | 杨光松,周鸣。。。.玻璃纤维增强复合材料的损伤分析.[J].国防科技大学学报,1988,10(3):1-11 ，108.[点击复制] |
| Yang Guangsong,Zhou Mingji.The Damage Analysis tor Glass/Epoxy Composites[J].Journal of National University of Defense Technology,1988,10(3):1-11 ，108[点击复制] |
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| 玻璃纤维增强复合材料的损伤分析 |
| 杨光松, 周鸣。。。 |
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(航天技术系)
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| 摘要: |
| 本文对玻璃纤维增强复合材料层合板进行了拉、剪多向应力本构关系的实验研究，成功地用软x射线照相观察到材料内部微裂纹沿纤维方向近似均匀分布，并沿裂纹面扩展至破坏的损伤形貌，同时结合声发射技术等监测其扩展规律。在此基础上建立了基于微观机制的微裂纹损伤模型，预测材料的损伤非线性本构关系和破坏，以及实验观察到的一些复合材料特有的损伤现象，理论预测结果与实验值吻合。 |
| 关键词: 复合材料损伤，微裂纹，软 x 射线，声发射技术 |
| DOI： |
| 投稿日期：1988-08-15 |
| 基金项目: |
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| The Damage Analysis tor Glass/Epoxy Composites |
| Yang Guangsong, Zhou Mingji |
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(Department of Aerospace Technology)
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| Abstract: |
| In this paper，we successful1y took the soft x-ray radiographs that distinctly. showed the internal damage such as microcracks in glass/epoxy composites The failure mechanisms and damage evolution law could be effectively obtained from these radiographs co-operating with AE results. Based upon the fact that the orientation of microcracks in fiber composites under loading is invariably in parallell with fiber，we define the damage variables correspond to mode Ⅰ and Ⅱ in macroscopic fracture mechanics，and obtain
the constitutive equations for the damaged lamina and laminate. The calculated results coincide closely with the experimental results. |
| Keywords: Damage in composite,Micracracks soft x-ray,AE technique |
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