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。
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.
计算了结构压缩的载荷-位移曲线和变形情况。
The force-displacement curve and the deformation are calculated.
用有限元方法分析了一种圆柱疏圈螺旋弹簧的压缩变形过程，获得了弹簧的力学参量分布、载荷-行程曲线等结果，包括了弹簧发生塑性变形的情况。
The compression process of a cylindrical-helical spring is analyzed. Distribution of the spring's mechanical parameters and load-distance curve are achieved. Plastic deformation is included.
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