考虑裂尖损伤的粘弹性裂纹扩展规律

THE VISCO-ELASTIC CRACK PROPAGATION LAW CONSIDERING THE DAMAGE EFFECT IN THE CRACK TIP

本文根据作者1在对聚合物断裂破坏过程的实验观测基础上，应用连续损伤力学的基本观点和方法所建立的裂纹尖端破坏模型，研究了考虑裂尖损伤的粘弹性裂纹扩展规律，讨论了以损伤演化和裂纹扩展行为构成的聚合物材料破坏的全过程，并在理论分析的基础上，具体计算了某种聚合物在恒定载荷作用下的裂纹扩展行为，预期的理论结果与实验值吻合的较好．

In this paper,using the known view-points and methods of the Continum Damage Mechanics,we discussed the visco -elastic crack propagation and whole peocess of the polymer failure which consists of damage evolution and the crack propagation on the basis of the constant observation under the SEM. Our calculation shows that the our theory and experimental values is uniform.