1. 它由试件平台(1)、模具(2)、测力传感器(3)、位移传感器(4)和复位机构(5)组成，试件平台(1)是框架形，水槽形的模具(2)的中间处横截面积小于两端处横截面积，模具(2)的固定端固定在试件平台(1)一端的内表面上，模具(2)的移动端设置有拉耳(2-1)，拉耳(2-1)通过销(8)与复位机构(5)的牵拽套(5-9)相连接，牵拽套(5-9)的内表面与销(8)的外表面间设置有测力传感器(3)，模具(2)的移动端侧面处设置有位移传感器(4)。
It is made up of test piece platform, mold, force measuring sensor, shift sensor and reset mechanism, the test piece is frame type, the section area in the middle part of the mold with water groove type is smaller than the section area at the two ends, the fixed end of the mold is fixed on the internal surface of one end of the test piece platform, the mobile end of the mold is arranged with a hook, which is connected to the cover of the reset mechanism through a pin, the internal surface of the cover and the external surface of the pin are arranged with force measuring sensors, the mobile end of the mold is arranged with shift sensor.