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。
Concrete unloading and re-loading models consist of linear models, multi-linear models and curve models.
混凝土卸载及再加载的模型有直线式、折线式和曲线式等。
Stress-strain curve at slow loading-rate obtained in alternating loading rate test is shifted along the unloading curves, and then it overlapped on stress-strain curve at a fast loading rate.
将在交替变换荷载速率试验中得到的对应于低荷载速率的应力–应变曲线沿着卸载曲线平移，可以与高荷载速率对应的应力–应变曲线重合。
Spindle static stiffness unloading is more than that of loading. The elastic deformation of spindle system resumes stagnantly when unloading. So the loading curve and unloading curve are not closed.
主轴静刚度在卸载时要大于加载时，卸载时主轴系统弹性恢复迟滞，并且加载曲线与卸载曲线不封闭，卸载时主轴变形恢复不到起点，进而影响加工精度。
Concrete stress-strain curves under cyclic loads include not only envelope curve, but also unloading and re-loading curves.
混凝土的反复加载应力-应变曲线不仅包括骨架曲线，还包括卸载及再加载曲线。
An example is cited to indicate that the comprehensive model fits the best with the test load-displacement curve, which shows that it's an efficient and simple unloading and re-loading model.
通过一个算例分析，指出了用该模型计算出的荷载-位移曲线与试验曲线最为接近，是一种有效且简单易用的卸载及再加载模型。
Next, unloading-reloading cycles are repeated in constant loading rate test with Sanjome andesite and Inada granite; and unloading curves at many points along stress-strain curve are obtained.
其次，对三城目安山岩和稻田花岗岩在恒定速率下进行循环加载卸载试验，得到了应力—应变曲线上很多点处的卸载曲线。
There is sudden change of slope in the stress-strain curve, because the core response in loading and unloading is entirely elastic, while the aluminum undergoes elastic-plastic deformation.
由于在拉伸过程中复合芯只表现出弹性变化，而铝绞线要发生弹塑性变形，使导线的应力应变曲线上存在斜率的突然变化；
There is sudden change of slope in the stress-strain curve, because the core response in loading and unloading is entirely elastic, while the aluminum undergoes elastic-plastic deformation.
由于在拉伸过程中复合芯只表现出弹性变化，而铝绞线要发生弹塑性变形，使导线的应力应变曲线上存在斜率的突然变化；
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