Abstract
In this paper, finite element simulation (FES) of the effect of free vibration treatment on fatigue damage recovery for notched copper film with the thickness of 33 um was investigated. The damage process analyzed by static analysis of original specimen and vibration process analyzed by transient dynamic analysis of damaged specimen were simulated respectively. The transient dynamic analysis was conducted with different frequencies and acceleration amplitudes. It is found that the plastic strain was produced as a result of cyclic loading and reduced after the vibration treatment. The values of plastic strain are different after treatment with different vibration frequencies and acceleration amplitudes. Furthermore, the plastic strain in notch reduces more than that of other areas of the specimen. According to the analysis, the vibration treatment can reduce the plastic strain of notched specimen significantly by which the microproperties are improved so that fatigue damage can be recovered.
Highlights
IntroductionThe VSR (vibratory stress relief) process is a green and emerging technology that refers to the relaxation of residual stress via cyclic loading treatments
The VSR process is a green and emerging technology that refers to the relaxation of residual stress via cyclic loading treatments
The results show that the maximum plastic strain is located at the root of specimen notch which was the (c) stress concentration district and the value is 1.399×10-2
Summary
The VSR (vibratory stress relief) process is a green and emerging technology that refers to the relaxation of residual stress via cyclic loading treatments. VSR methods have been successfully used to relieve or redistribute stress and guard against service failures, such as stress corrosion cracking. Heat treatment is a popular stress relief method in the metal forming industry. While this treatment yields stress-free materials, it has numerous disadvantages, such as along process time, significant energy consumption, oxide scale formation on the surface, and substantial effects on the mechanical properties. The stress relief performance of the VSR process remains inferior to that of heat treatment, this method is widely used in various industrial fields as a result of its time-saving, small equipment volume requirements, low cost, minimal energy consumption [1,2,3,4,5]
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