Furthermore, at all impact power, the wear mechanism of the material changes distinctively with the time under the cyclic impact stress.

同时，在各个冲击功下，材料的磨损机理在冲击应力的循环作用下随时间发生明显变化。

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This method has reference values in analyzing the dynamic stress in some structure under transient loads such as blast and impact.

本文对于承受爆炸、冲击等瞬态载荷作用下的结构动应力计算也有参考价值。

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This method has reference values in analyzing the dynamic stress in some structures under transient loads such as blast and impact.

本文对于承受爆炸、冲击等瞬态载荷作用下的结构动应力计算也有参考价值。

youdao

"The constantly increasing workload and stress under which teachers work, and their vulnerability to the ailments brought into school by pupils, inevitably impact on the amount of time they have off sick, " a spokeswoman said.

BBC: Sickness toll among teachers