A new calculation mode of the earth stress of vertical fracture is built based on generalized Hook 's law in this paper, which is suitable to hydraulic fracturing cracks.

该文基于广义虎克定律，建立了适用于水力压裂裂缝为垂直裂缝的地应力计算模式。

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One is called the S-N curve of surface fracture mode. It is governed by a crystal slip on the specimen surface, which occurs in the region of short fatigue life and high stress amplitude level.

一组叫做表面破坏模式的S-N曲线，它发生在高应力幅短寿命区，是由试样表面晶体滑移引起的。

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Dobriskey's preparations have been far from ideal, suffering a stress fracture to her back, followed by a thigh injury.

BBC: Dobriskey hopes for world glory