A test method for high temperature compressive yield strength of materials

Abstract

The invention provides a high-temperature compression yield strength test method for materials, which uses a creep testing machine and a compression fixture to perform a high-temperature compression loading test on the material. The compression fixture includes upper and lower clamping parts and is used to connect between the upper and lower connectors of the creep testing machine Between the commutator, the commutator includes the upper and lower pressure blocks, and there is a distance between the upper and lower pressure blocks along the tensile direction of the creep testing machine for installing the sample, and the distance value can be Adjustment, the upper and lower pressure blocks use triangular prism-shaped positioning holes to cooperate with the clamping parts to clamp and fix the sample in the radial direction of the sample. The method of the present invention thickens the diameter of the rod-shaped sample and delays The time for obvious bending ensures the safety of the test machine and the operation process, and changes the end of the sample from a threaded structure to a smooth cylindrical structure, which enhances the clamping firmness of the sample and reduces the time required for processing the sample to the finished product. The steps that go through can also enhance the centering of the specimen.

Description

technical field [0001] The invention relates to high-temperature compression yield strength test equipment and an operation method thereof, in particular to a high-temperature compression yield strength test method for materials. Background technique [0002] With the rapid development of my country's industry, creep age forming technology is also making continuous progress. Creep age forming technology is the main forming technology for large-scale panels such as aircraft and rockets. In the actual creep age forming of aluminum alloy and other materials Previously, finite element software was generally used for creep aging forming simulation, and the most suitable actual forming scheme was determined through software simulation. Before the creep aging forming simulation of the material, the creep performance of the material should be tested. A creep testing machine is commonly used. The material to be tested is processed into a sample, and the sample is clamped in the creep ...

AI Technical Summary

Problems solved by technology

Since there is also an installation gap when the thread is screwed, the sample may still slightly shake from side to side during the compression process, and the stability and neutrality are not good enough. During the high temperature compression yield strength test, the sample There is a certain difference in the left and right deformation of the sample. 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, and the accurate high-temperature compressive yield strength and high-temperature stress-strain curve of the material cannot be obtained.

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