High-speed tensile test steel plate sample piece clamp

Abstract

The invention provides a high-speed tensile test steel plate sample piece clamp. The high-speed tensile test steel plate sample piece clamp comprises an upper holding forcep, a lower holding forcep and a locking device, wherein a clamp forceps shape is formed by the upper holding forcep and the lower holding forcep which are symmetrical up and down; the rear ends of the upper holding forcep and the lower holding forcep are mounted in the locking device. Each of the upper holding forcep and the lower holding forcep is provided with a corresponding bolt hole and a locking bolt which penetrates through the two bolt holes is arranged to lock the upper holding forcep and the lower holding forcep; the rear end of the locking device is mounted on a base; an elastic device is arranged on the base and the base is provided with two seat plates which are arranged in parallel; a buffering spring is connected between the two seat plates. According to the clamp, on the basis of keeping the structure of a previous static stretching test clamp, the locking bolt structure is additionally arranged on the upper holding forcep and the lower holding forcep so that the clamping force on a steel plate sample piece is improved; the elastic connection device is arranged so as to realize the flexible connection of the clamp and stretching test equipment and the influences on testing data by stretching impacts are reduced.

Description

technical field [0001] The invention relates to a high-speed tensile test, in particular to a steel plate sample fixture for a high-speed tensile test. Background technique [0002] With the gradual promotion of the application of CAE technology in the field of automobile safety, the demand for mechanical property data of steel plate materials at high strain rates is increasing, and the mechanical property data at high strain rates are mainly achieved through high-speed tensile tests. The current high-speed tensile test of steel plate materials still uses the quasi-static tensile test fixture, see figure 1 . The clamp is composed of an upper clamp 11 , a lower clamp 12 and a locking device 13 . The sample is clamped by the static friction force produced by the pressing of the upper clamping pliers 11 and the lower clamping clamp 12 , and the tightening degree is controlled by the locking degree of the locking device 13 . However, in the high-speed tensile state, the strai...

AI Technical Summary

Problems solved by technology

However, in the high-speed tensile state, the strain rate of the sample is usually 100-500 / S, which is hundreds of thousands of times that of the quasi-static 0.001 / S. Therefore, the current clamping method is easy to cause the sample to fall off, and the test fails; another On the one hand, the current fixture is rigidly connected to the tensile test equipment through the locking device 13, which will easily cause the waveform of the data transmission to be unstable under the condition of a huge impact, which will affect the accuracy of the test data

Images