论文部分内容阅读
采用双参数威布尔模型描述纤维强度分布,结合总体载荷承担准则确定基体裂纹平面处断裂纤维和完好纤维承担载荷。基于卸载/重新加载时纤维相对基体滑移损伤机理,确定了纤维轴向应力分布。采用断裂力学方法确定了界面脱粘长度、卸载界面反向滑移长度和重新加载新界面滑移长度,对比了不同峰值应力下考虑和未考虑纤维失效影响的迟滞回线,分析了纤维特征强度和纤维威布尔模量对纤维失效、迟滞回线形状和面积的影响,预测的迟滞回线与试验数据相吻合。
The two-parameter Weibull model is used to describe the fiber strength distribution, and the total load bearing criterion is used to determine the load of the broken fiber and the intact fiber at the crack plane of the substrate. Based on the mechanism of slip relative to the substrate during unloading / reloading, the axial stress distribution was determined. Fracture mechanics was used to determine the interfacial debonding length, the reverse slip length of the unloading interface and the re-loading of the new interface slip length. The hysteresis loops with and without considering the fiber failure under different peak stresses were compared. The fiber characteristic strength And the effect of fiber Weibull modulus on fiber failure, hysteresis loop shape and area, the predicted hysteresis loop is consistent with the experimental data.