高聚物的断裂理论和普适断裂力学理论的应用

Fracture Mechanics of Polymeric Materials and Applications of Generalized Fracture Mechanical Theory

如果从裂纹尖端的应力集中来推导材料断裂强度,会得出不合理的结论。因此格里菲思和茹柯夫分别从能量和微观化学键断裂的角度来考虑材料的断裂问题。然而对于黏弹性的高聚物材料,这些理论均一定程度上偏离实际情况,无法解释全部的实验结果。安德鲁斯通过引入一个能量损耗因子将能量与化学键断裂情况结合起来,从而得到了能反映黏弹性高聚物断裂强度的普适性理论,并成功用于解释界面粘接树脂的性能。

Treating the fracture of materials based on stress concentration will obtain illogical conclusions.Unlike that,Griffith considered the fracture situation in view of energy,andЖирковtreated the fracture of materials based on breaking of chemical bonds.However their theories are not good enough to explain all experimental results in the fracture of polymeric materials with viscoelasticity.Andrews combined the view of energy and the breaking of chemical bonds by introducing a factor of energy loss during fracture.This deduced a generalized theory which can be used to understand the polymeric materials with viscoelasticity.This theory is also successfully fitted to the interfacial binding of resin.