Method for determining fatigue damage degree of metal material based on specific gravity measurement

A metal material, fatigue damage technology, applied in specific gravity measurement, measurement device, analysis material, etc., can solve the problems of inability to apply metal material stretching, difficulty, and difficulty in area measurement.
CN105424554AInactive Publication Date: 2016-03-23CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
Publication Date
2016-03-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for determining the fatigue damage degree of a metal material based on specific gravity measurement. The method includes the following steps that 1, the density rho of the metal material without damage and the density (with the symbol shown in the specification) of the metal material with damage are measured; 2, the fatigue damage value of the metal material is calculated according to the formula (shown in the specification), wherein D indicates the fatigue damage value of the metal material. The method for determining the fatigue damage degree of the metal material based on specific gravity measurement is high in reliability and easy to implement.
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Description

technical field

[0001] The invention relates to a method for determining the degree of fatigue damage of metal materials based on specific gravity measurement. Background technique

[0002] The history of metal plastic damage research has only been more than half a century since the former Soviet scientist Kachanov proposed the "continuity factor" and "effective stress" in 1958. Although rapid development has been achieved in recent years, such as the elastic modulus test method, ultrasonic method, resistance test method and microhardness method of metal plastic damage, etc., and the application of damage mechanics to the design and construction of nuclear reactors, large deformation processing of metals, etc. Forming limits in and estimated service life of engineering components, etc. But there are also many literatures that question the existence of metal plastic damage. It can be seen that damage mechanics is still in a developing stage, the main reason is that damage m...

Claims

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