| 桥联特性对纤维复合材料裂纹扩展阻力曲线的影响 |
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| 引用本文： | 董启文,冯凭,孙毅,刘璇. 桥联特性对纤维复合材料裂纹扩展阻力曲线的影响[J]. 哈尔滨工业大学学报, 2002, 34(3): 348-351 |
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| 作者姓名： | 董启文 冯凭 孙毅 刘璇 |
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| 作者单位： | 哈尔滨工业大学航天学院,黑龙江哈尔滨,150001 |
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| 摘 要： | 针对纤维复合材料，在吸附区模型的基础上，采用一定的桥联关系，用断裂力学的理论导出裂纹表面张开位移的控制方程，采用数值解法，得到裂纹张开位移和桥联力的分布，在此基础上，进一步计算得出了裂纹扩展的阻力曲线，并讨论了纤维的体积比、纤维与基体间界面摩擦力及纤维强度对裂纹扩展阻力曲线的影响。
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| 关 键 词： | 桥联特性 裂纹扩展 阻力曲线 纤维增强复合材料 吸附区模型 断裂力学 张开位移 桥联力 |
| 文章编号： | 0367-6234(2002)03-0348-04 |
| 修稿时间： | 2001-10-18 |
Influence of bridging characteristics on fracture resistance curves |
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| DONG Qi wen,FENG Ping,SUN Yi,LIU Xuan. Influence of bridging characteristics on fracture resistance curves[J]. Journal of Harbin Institute of Technology, 2002, 34(3): 348-351 |
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| Authors: | DONG Qi wen FENG Ping SUN Yi LIU Xuan |
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| Abstract: | From a cohesive-zone model with some bridging relation, an integral equation governing the bridging displacement distribution along the crack surface has been derived using the fracture mechanics theory for fiber-reinforced composite. Crack opening displacement and fiber-bridging stress distribution curves have been obtained through numeri nal compufation,and matrix cracking conditions and fracture resistance curves have been established through computation as well. The influences of fiber-fraction , interfacial shear stress and fiber strength on fracture resistance curves are discussed. |
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| Keywords: | fiber-reinforced composites cohesive zone model fracture resistance curve. |
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