Fatigue testing device of material under thermal-mechanical coupling effect

Abstract

The invention provides a fatigue testing device of a material under a thermal-mechanical coupling effect. The fatigue testing device comprises a loading device used for supplying single-axis tension load or compression load to a sample, an induction heating coil used for quickly heating and a cooling device used for quickly cooling the sample, wherein the loading device comprises two clamp bases and a driving mechanism used for driving the two clamp bases to be close to each other or far from each other; the induction heating coil is located in a sample loading area formed between the two clamp bases; the cooling device is close to the sample loading area and can adopt an air-cooling manner or a water-cooling manner; clamp heads corresponding to the sample are arranged on the two clamp bases; the induction heating coil can rotate horizontally and vertically to adjust the position. The fatigue testing device provides a reasonable test environment for testing the fatigue life of the material or a product under the thermal-mechanical coupling effect, can implement the thermal-mechanical coupling fatigue test under the tension and compression states so as to more accurately predict the fatigue life of the material or the product, and is capable of quickly increasing the temperature, shortening the test period and improving the test efficiency.

Description

technical field [0001] The invention belongs to the technical field of material testing, and in particular relates to a material fatigue testing device under the action of thermomechanical coupling. Background technique [0002] The fatigue test under the thermal-mechanical coupling of materials is an effective way to accurately evaluate the performance or life of materials in practical applications. However, the existing fatigue testing machines only consider the effect of thermal load or mechanical load. In fact, many materials or products are subjected to the combined effect of thermal load and mechanical load in actual work. Load, it will be difficult to accurately evaluate the stress state of materials or products and predict the fatigue life of materials or products. Moreover, in the prior art, the equipment is complicated, the energy consumption is high, and the heating and cooling cycle is long, which leads to a long cycle of a single test. Usually, the sample has t...

AI Technical Summary

Problems solved by technology

However, the existing fatigue testing machines only consider the effect of thermal load or mechanical load. In fact, many materials or products are subjected to the combined effect of thermal load and mechanical load in actual work. load, it will be difficult to accurately evaluate the stress state of materials or products and predict the fatigue life of materials or products

Moreover, in the prior art, the equipment is complicated, the energy consumption is high, and the heating and cooling cycle is long, which leads to a long cycle of a single test. Usually, the sample has to go through thousands of tests, which makes the thermal coupling fatigue test of the sample time-consuming. long

Although a thermal-mechanical coupling fatigue loading device has also appeared, it can only perform heating and rotating bending fatigue loading on the sample.

At the same time, the traditional loading fixtures are relatively simple and cannot adapt to the clamping and loading of various samples.

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