Curling preventor of axial compression fatigue experiment

Abstract

An antibending device in axial compressing fatigue test consists of two pairs of antibending clamp plates such as top pair of antibending clamp plates and bottom pair of antibending clamp plates. It features that two pairs of antibending clamp plates are used to clamp top part and bottom part of testing piece separately, the gap between two pairs of antibending clamp plates is 2 - 3 times of testing piece thickness.

Description

Technical field [0001] The invention relates to a physical performance test device for metal materials, in particular to an axial compression fatigue test device for thin metal plates or slender rods. Background technique [0002] In the scientific research or practical application of metal materials, axial compression fatigue tests of metal sheets or slender rods are often required. For example, in order to ensure the flight safety of the aircraft, the aluminum alloy sheet used as the skin of the aircraft must undergo an axial compression fatigue test on the aluminum alloy sheet before the aircraft is manufactured. [0003] When performing axial compression fatigue tests on thin metal plates or slender rods (hereinafter collectively referred to as samples), in order to avoid excessive bending deformation of the samples after compression, an anti-bending device is required. The existing anti-bending device is composed of a pair of anti-bending splints connected with the sam...

AI Technical Summary

Problems solved by technology

Therefore existing anti-bending device has the following disadvantages: one, if the anti-bending splint and the sample are clamped too tightly, it will hinder the stretching and deformation of the sample with the alternating load; and because the anti-bending splint may also bear part of the load, Make the load on the sample less than the load applied by the testing machine, causing load errors, thus affecting the accuracy of the test results

2. If the anti-bending splint and the sample are clamped too loosely, the bending deformation of the slender and thin sample is too large, and the anti-bending effect of the anti-bending device is poor

In short, using the existing anti-bending device to carry out the axial compression fatigue test of the thin metal plate or the slender rod has disadvantages such as difficult operation, difficult test, and large error in test results.

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