表面改性UHMWPE纤维黏结性的有限元分析

Finite element analysis of adhesion of surface modified UHMWPE fibers

采用铬酸氧化法及吡咯气相沉积聚合法处理UHMWPE纤维。测定纤维与环氧树脂界面的剪切强度;用有限元法模拟处理后UHMWPE纤维与环氧树脂界面的剪切强度,将所得结果与实验值进行比较。研究结果表明:铬酸处理后纤维与环氧树脂界面剪切强度模拟值与实验值较一致,且模拟值略高于实验值;随吡咯气相沉积聚合时间延长,聚吡咯/UHMWPE纤维与环氧树脂界面剪切强度的模拟值与实验值越接近,沉积1 h时,剪切强度模拟值与实验值最接近。

UHMWPE fibers were treated by chromic acid oxidation and pyrrole vapor deposition respectively. The interracial shear strength of the fiber/epoxy resin system was tested, and then calculated by finite element method. The calculated interfacial shear strength was compared with the experimental value. The results show that the calculated interfacial shear strength of chromic acid treated UHMWPE fibers/epoxy resin system revealed a better agreement with the experimental value, and slightly higher than the experimental value. Increasing pyrrole vapor deposition polymerization time, the calculated interfacial shear strength approached the experimental value. When pyn＇ole process was 1 h, the calculated value was nearest to the experimental value.