strain-release point

In order to verify the analysis results, static test on two spatial full-sized solid models is carried out, and the step-by-step load apply system is adopted to find out the stress and strain value of each testing point.

为验证计算分析结果，对两个受力较大的铸钢节点进行了足尺实体静力试验，采用分级加卸载制度获取各级荷载下各观测点应力应变值。

The results made clear that the widely used method with attached stiffness set in compressive test of stress-strain complete curve was not proper for concrete in direct tension. complete curve of a three-point bending concrete beam is realized.

在普通试验机上进行的混凝土抗拉应力-应变全曲线的试验研究结果表明，在抗压全曲线试验中采用的刚性试验机和附加刚性组件的方法在抗拉全曲线的试验中并不适用。

From another point of view, tension strain could not exist in the rock under high confining pressure, it could only exist under low confining pressure.

从另一意义上讲，处于高围压环境中的岩石，其内部不可能存在拉应力，拉应力只在低围压状态中存在。

It was pointed out that in tensile test with specimen of C-grade casting steel, the load-halt method or the judgment from the pointer swing of strain instrument could not give clearly the yield point except the graphical analysis method.

指出测定C级钢拉伸试样屈服点时，用载荷停顿法或指针法，屈服现象不明显，只有图解法可一次测出未知屈服指标。

Test of Impact force by using two-point strain Measuring Method

两点应变测量法测试冲击力