中文摘要：

纤维残存长度及其分布是影响纤维增强聚合物基复合材料性能的重要因素之一。通过对碳纤维在纯剪切流场中的受力断裂行为分析，建立了复合材料中碳纤残存长度和重均残存长度的预测模型，并借助密炼机混合实验，时上述2个模型进行了验证。结果表明：预测结果与实验结果误差在15％以内；随着转子转速的增加，碳纤残存长度和重均残存长度减小；随着混合时间的增加，纤维受到的累积解聚功增加，碳纤残存长度和重均残存长度减小。

英文摘要：

The residual length and its distribution of CF were one of the important factors that affect the properties of fiber reinforced composites. The fracture behavior of CF was analyzed in the pure shear flow,CF residual length and weight average residual length prediction model were established. Then two models were verified by mixer mixing experiments. The experimental results showed that the error between the predicted results and the experimental results was less than 15%. With the increase of the rotor speed, residual length and weight average residual length of CF decreased. With the increase of the mixing time,the cumulative power increased of fible depolymerization residual length and weight average residual length of CF decreased.