Acoustic Emission testing

Acoustic emission testing of metal material fatigue process

Update time：2005-08-18 14:49　　　 Viewed：次

Acoustic emission has become a hotspot in the research of the materials science and engineering subject and achieved many meaningful results, especially providing a new research method for those problems classic fatigue research methods are difficult to solve, such as research on the activities of the tiny cracks. People have also tried to make research in material fatigue monitoring of acoustic emission technique and have found the relationship between acoustic emission parameters and material of crack length and the stressintensity factor.

Make use of acoustic emission (AE) technology to conduct dynamic monitoring for wire rope fatigue damage process. The results show that the fatigue damage is generally produced from different parts of the steel wire’s length direction and all parts’ damage will reach a longterm slow development stage after the wire’s beginning stage of plastic deformation, during which the dominant crack forms. Due to the development of main guide crack in a quick expansion way, the fatigue life is mainly composed of main crack and generating period.

Application of acoustic emission technology can qualitatively describe metal material’s material performance degradation after fatigue loading, that is damage degree.
(Editor：admin)

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