This is formed by the cracks oscillating about the centerline in the direction of crack propagation.
这是由于在裂纹的传播过程中，裂纹尖端沿着传播方向的中线上下振荡所形成的。
The results showed that the weak interface can block the motion of the dislocations and change the propagation direction of the main crack, and result in forming lamella fracture surface.
结果表明，弱界面有阻碍位错运动、偏转主裂纹扩展方向的作用，可形成分层断口。
The results showed that the weak interface can block the motion of the dislocations and change the propagation direction of the main crack, and result in forming lamella fracture surface.
结果表明，弱界面有阻碍位错运动、转主裂纹扩展方向的作用，可形成分层断口。
The fatigue crack propagation rate (FCPR) of as-rolled AM60 in the longitudinal direction is higher than that of the transverse direction.
轧制AM60的横向疲劳裂纹扩展速度（FCPR）明显地高于纵向。
A stress analysis of a diesel engine crankshaft is made by FEM based on dynamics analysis to determine the position of the initial crack and its propagation direction.
在内燃机动力分析的基础上，运用有限单元法，通过对曲轴应力分析，确定了裂纹启裂部位和扩展方向；
A stress analysis of a diesel engine crankshaft is made by FEM based on dynamics analysis to determine the position of the initial crack and its propagation direction.
在内燃机动力分析的基础上，运用有限单元法，通过对曲轴应力分析，确定了裂纹启裂部位和扩展方向；
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