The conclusion is that the size of terrestrial stress mainly is vertical principal stressmaximum and the fracture of hydraulic fracturing is vertical.
最大水平主应力方向以近东西向为主,水力压裂裂缝的延伸方向也以近东西向为主;
2
It can provide plenteous data, and provide reference for design of cushioning package with maximum acceleration, static stress and cushion coefficient.
该方法能够提供充足的数据,并为缓冲包装设计提供最大加速度、静应力和缓冲系数的参考。
3
The fatigue properties were researched and found that the crack propagation velocity and the decline of rigidity were related to the maximum cycle stress.