If the structure is elastic the force-displacement curve follows the same path on loading and unloading.
如果该结构为弹性，那么在加载和卸载时力位移曲线遵循相同的迹线。
The relationship between the restoring force-displacement curve and the stress in the ring during loading and unloading was analyzed.
分析了加载卸载过程中力-位移曲线与环内应力的关系。
The imitational parameters are different for loading section and unloading section of the fine-sandstone deformation curve at the same circulate curve under the same deformation-rate and stress-level.
在相同位移速率和相同载荷水平条件下，同一次循环时岩石变形曲线的加载段与卸载段的相应拟合参数值不同。
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