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Evaluation of Fatigue Damage in Steel Plates Through Non-linear Ultrasonic Technique
https://orcid.org/http://orcid.org/0000-0003-4229-4716
Under the action of repeated stress on the components such as turbine blades, springs, crankshafts, biomedical transplantation, and load components, the strength of the material is reduced or the material is damaged. These components continue to be subjected to different types of tension, compression, bending, vibration, thermal expansion, and contraction or other repetitive stress effects. These stresses are often lower than the yield strength of the material, but must be greater than the fatigue limit of the material. The stress can cause the dislocation substructure of the material, thereby changing fatigue failure. In this study, we mainly used non-linear ultrasonic measurement to generate high-energy waves, made it incident on the steel and received its double-frequency signal at the other end. Then we calculated the non-linear factor of steel based on the ratio of the double frequency amplitude to the square of the fundamental frequency amplitude. Besides, the non-linear factor of steel was measured under different fatigue cycles. Then, the curve of the material non-linear factor was determined and the cycle stress number was measured by the relationship between different fatigue cycles and their non-linear factors. The final results show that, with the increase in the number of applied cyclic stresses, the non-linear factor also tends to increase. The non-linear factor of the test piece with no damage at all and the test piece with one million fatigue damages can be up to 6.5%. Non-linear ultrasonic technique was successfully implemented to analyse the fatigue damages.
Evaluation of Fatigue Damage in Steel Plates Through Non-linear Ultrasonic Technique
https://orcid.org/http://orcid.org/0000-0003-4229-4716
Under the action of repeated stress on the components such as turbine blades, springs, crankshafts, biomedical transplantation, and load components, the strength of the material is reduced or the material is damaged. These components continue to be subjected to different types of tension, compression, bending, vibration, thermal expansion, and contraction or other repetitive stress effects. These stresses are often lower than the yield strength of the material, but must be greater than the fatigue limit of the material. The stress can cause the dislocation substructure of the material, thereby changing fatigue failure. In this study, we mainly used non-linear ultrasonic measurement to generate high-energy waves, made it incident on the steel and received its double-frequency signal at the other end. Then we calculated the non-linear factor of steel based on the ratio of the double frequency amplitude to the square of the fundamental frequency amplitude. Besides, the non-linear factor of steel was measured under different fatigue cycles. Then, the curve of the material non-linear factor was determined and the cycle stress number was measured by the relationship between different fatigue cycles and their non-linear factors. The final results show that, with the increase in the number of applied cyclic stresses, the non-linear factor also tends to increase. The non-linear factor of the test piece with no damage at all and the test piece with one million fatigue damages can be up to 6.5%. Non-linear ultrasonic technique was successfully implemented to analyse the fatigue damages.
Evaluation of Fatigue Damage in Steel Plates Through Non-linear Ultrasonic Technique
https://orcid.org/http://orcid.org/0000-0003-4229-4716
Under the action of repeated stress on the components such as turbine blades, springs, crankshafts, biomedical transplantation, and load components, the strength of the material is reduced or the material is damaged. These components continue to be subjected to different types of tension, compression, bending, vibration, thermal expansion, and contraction or other repetitive stress effects. These stresses are often lower than the yield strength of the material, but must be greater than the fatigue limit of the material. The stress can cause the dislocation substructure of the material, thereby changing fatigue failure. In this study, we mainly used non-linear ultrasonic measurement to generate high-energy waves, made it incident on the steel and received its double-frequency signal at the other end. Then we calculated the non-linear factor of steel based on the ratio of the double frequency amplitude to the square of the fundamental frequency amplitude. Besides, the non-linear factor of steel was measured under different fatigue cycles. Then, the curve of the material non-linear factor was determined and the cycle stress number was measured by the relationship between different fatigue cycles and their non-linear factors. The final results show that, with the increase in the number of applied cyclic stresses, the non-linear factor also tends to increase. The non-linear factor of the test piece with no damage at all and the test piece with one million fatigue damages can be up to 6.5%. Non-linear ultrasonic technique was successfully implemented to analyse the fatigue damages.
Evaluation of Fatigue Damage in Steel Plates Through Non-linear Ultrasonic Technique
Int J Steel Struct
Yang, Che-Hua (author) / Jeyaprakash, N. (author) / Wu, Shan-Yan (author)
International Journal of Steel Structures ; 23 ; 1251-1264
2023-10-01
14 pages
Article (Journal)
Electronic Resource
English
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