Compressive yield strength test method for material

Abstract

The invention provides a compressive yield strength test method for a material. A normal-temperature compression loading test is carried out on the material by using a universal testing machine and acompression clamp, the compression clamp comprises an upper jacking component, a lower jacking component and a commutator used for being connected between an upper connecting head and a lower connecting head of the universal testing machine, the commutator comprises an upper pressing block and a lower pressing block, the distance between the upper pressing block and the lower pressing block alongthe tensile direction of the universal testing machine for installing a sample is kept, the distance value can be adjusted, the upper pressing block and the lower pressing block are used for clampingand fixing the sample in a jacking mode that triangular prism-shaped positioning holes are matched with the jacking components along the racial direction of the sample. According to the method provided by the invention, the diameter of the rod-shaped sample is thickened, the time for obviously bending the sample is delayed, the safety of a test machine and an operation process is guaranteed, the end part of the sample is changed into a smooth cylindrical structure from a threaded structure, the clamping firmness of the sample is enhanced, the steps required for processing the sample into a finished product are reduced, and the neutralization of the sample can also be enhanced.

Description

technical field [0001] The invention relates to compression yield strength test equipment and an operation method thereof, in particular to a material compression yield strength test method. Background technique [0002] With the rapid development of my country's industry, material forming technology is also constantly improving. The normal temperature compression yield strength test of materials is a common test item to verify the material's normal temperature compression yield strength. There are many, the following two are common: [0003] The first one, creep aging forming technology is the main forming technology for large-scale panels such as aircraft and rockets. After creep aging forming of aluminum alloy and other materials, in order to test the influence of creep aging process on material properties, generally The yield strength of the sample at room temperature after the creep aging forming test process is used to determine the influence of different creep aging c...

AI Technical Summary

Problems solved by technology

[0006] Since the sample and the chuck are screwed together, there will be an installation gap when the screw is screwed. Therefore, there will still be a slight left and right shaking of the sample during the compression process. Stability and alignment The performance is not good enough. There is a certain difference between the left and right deformation of the sample during the normal temperature compression yield strength test. If the difference is large, it will affect the accuracy of the test data, and the sample has already bent before reaching the yield point, so it is impossible to obtain Accurate room temperature compressive yield strength and high temperature stress-strain curve of materials

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