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中文摘要：
纤维复合材料的损伤与破坏是缺陷萌生发展的过程。裂纹缺陷周围的应力变形场是影响裂纹扩展的重要因素。本文通过裂纹缺陷存在于纤维复合介质中的力学分析模型，由断裂力学中的J积分及有限元计算方法，探讨不同纤维组分和裂纹位于介质中不同位置时，应力场参量随之变化的规律，并进行了相关讨论分析。
英文摘要：
The damage and fracture of composite materials are of the process of fault germinating and developing. The stress field near crack tip is an important factor to effect crack extension. A model of crack fault existing in fiber reinforced composite materials is established and the value of J integral is calculated by finite element method. The actions of fiber proportion and crack location in the composite are discussed on the factor of stress field. And the conclusion is also given in the present paper.
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The repeated homogeneous balance method and its applications to nonlinear partical differential equa
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