Stick-slip testing apparatus with controllable driving rigidity

Abstract

The invention discloses a stick-slip testing apparatus with controllable driving rigidity. The stick-slip testing apparatus with controllable driving rigidity comprises a supporting bottom board, a cross bearing assembly, a balancing lever, a measuring unit, a sample table assembly and a driving assembly, wherein the lower end of the cross bearing assembly is connected with the supporting bottom board and extends upwards; the balancing lever is located above the supporting bottom board, is connected with the cross bearing assembly, can rotate around the cross bearing assembly and can swing up and down around the cross bearing assembly; the measuring unit is detachably connected to the right end of the balancing lever; the sample table assembly is arranged on the supporting bottom board and is opposite to the measuring unit; the driving assembly is arranged on the supporting bottom board and is used for driving the balancing lever to rotate around the cross bearing assembly. According to the stick-slip testing apparatus with controllable driving rigidity, disclosed by the invention, different measuring units can be selectively mounted as required and have different rigidities, so that the requirements of stick-slip tests under different conditions can be met.

Description

technical field [0001] The invention relates to the technical field of tribology, in particular to a stick-slip test device with controllable driving stiffness. Background technique [0002] With the continuous development of tribology research, the research on the basic problems of tribology is gradually deepening. Stick-slip, as the basic unit of the friction process, is very important for understanding the interface friction behavior. When an object slides on another surface at a very low speed, the friction process will become discontinuous, and the motion will show the law of alternating stick-slip, which is called stick-slip. The seemingly smooth friction process often contains thousands of tiny stick-slip units. Although these tiny units cannot be seen intuitively, stick-slip is widely present in our daily life, such as when mechanical parts move Noise, violin playing, and the breaking of rocks during earthquakes. Therefore, in-depth study of the stick-slip process...

AI Technical Summary

Problems solved by technology

However, almost all commercial friction and wear testing machines ensure the stability of the normal load by reducing the stiffness in the loading direction, and the stiffness in the driving direction is too large to achieve controllable large-scale stick-slip

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