A theory of delayed crackinstability of viscoelastic bodies is pro-posed in this paper.
本文提出了粘弹性裂纹体的延迟失稳理论。
2
Volcanically water flooding of oil well is very ubiquitous during oil developing. It is the result of crackinstability propagation in the reservoir.
油井暴性水淹是裂缝性砂岩油田开发的普遍特征，其中很多是由注水引起裂缝失稳扩展所致。
3
Using the LFEM theory, the author provided the computing method of stress strength factor of crack and the criteria of crackinstability propagation and propagation angle.