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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 proportional bridging law, an analytical model of I-type layered bridging cracks is given by Euler Bernoulli beam theory. The results show that the energy release rate of crack has a rising to descending process as the crack propagates, which is totally different from the case without bridging: the energy release rate monotonically increases with the crack growth. Bridge fiber stop effect is obvious.