On the basis of mechanism of sediment exchange, some improvements in relation to the calculation method for river-bed deformation are performed.

根据泥沙交换原理，对河床变形计算方法进行了若干改进。

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The deformation and fracture of rocks are an evolution process with exchange of energy and mass between rocks and outer exotic environment.

岩石在变形破坏过程中始终不断地与外界交换着物质和能量，是一个能量耗散的损伤演化过程。

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The strain in the deformation zone distributes very complicatedly in cross section. The metal exchange between web and flange takes place in alternative direction as the deformation is in progress.

结果显示，变形区内横截面应变分布非常复杂，腹板和翼板间的金属交换在不同变形区域内发生方向变化。

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