If the failure is defined as the final fracture of a component, then both S-N curves and crack growth rate curves reflect the fundamental material behavior under fatigue loading.
如果都把一个构件的最终断裂作为疲劳破坏的定义，则S - N曲线和裂纹扩展率曲线均是反映金属在疲劳载荷作用下的基本材料特性。
The major big rift and two groups of the minor rifts approximately pointing to S-N in the area are the main pathway and the main tectonic crack of heat controller for the hydrothermal activity.
区内近S—N向的主要大断裂和两组次一级的断裂是水热活动的主要通道和主要控热构造裂隙。
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