摘要
基于比例桥联律 ,利用Euler Bernoulli梁理论 ,给出一个关于I型分层桥联裂纹的解析模型。结果分析表明 ,裂纹的能量释放率随着裂纹的扩展有一个上升到下降的过程 ,这完全不同于无桥联时的情况 :即能量释放率随着裂纹的扩展而单调上升。桥联纤维止裂效果明显。
Based on the proportionalfiber-bridged law, an analytical model of mode-Ⅰ intralaminar fiber-bridgedfracture is presented by using the Euler-Bernoulli beam theory. The theoretical investigation shows that the energy release rate of this fiber-bridgedfracture goes up firstly and then goes down with crack propagation. It is very different with mode-Ⅰ intralaminar fracture without fiber-bridge: the energy release rate increases monotonously with crack propagation.
出处
《机械科学与技术》
CSCD
北大核心
2004年第2期164-166,共3页
Mechanical Science and Technology for Aerospace Engineering
基金
航空科学基金 (99D5 3 0 14 )资助
关键词
桥联
分层裂纹
能量释放率
Fiber-bridge
Intralaminar fracture
Energy release rate
