Fracture analysis of the fan shaft was made by observing macroscopic and microscopic appearances of the crack, and examining micro hardness and chemical composition of the material.
通过观察断裂风机轴裂纹宏观和微观形貌，检验化学成分、显微硬度等方法对风机轴断裂的原因进行了分析。
Brittle fracture. Fracture that occurs by rapid crack propagation and without appreciable macroscopic deformation.
通过快速裂纹扩展发生断裂，没有明显的宏观变形。
The irreversible deformation and fracture of solids may be related to a class of processes in which the macroscopic effects are predominated by mesoscopic level behavior.
固体的不可逆形变和断裂与一类过程相关，在此过程中宏观效应是细观层次行为起着支配作用。
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