Effect of unconstraint vibration treatment on fatigue damage healing for copper film

2019 ◽  
Vol 764 ◽  
pp. 138265
Author(s):  
Hai-Meng Zhang ◽  
De-Guang Shang ◽  
Xiao-Dong Liu ◽  
Ya-Nan Liu ◽  
Yu Zhang
Keyword(s):  
Fatigue Damage ◽  
Copper Film ◽  
Vibration Treatment ◽  
Damage Healing

scholarly journals Fatigue damage healing model based on dislocation reverse-back under unconstraint vibration condition for copper film

2021 ◽  
Author(s):  
Haimeng Zhang ◽  
De-Guang Shang ◽  
Xiao-Dong Liu ◽  
Yu Zhang
Keyword(s):  
Fatigue Damage ◽  
Treatment Process ◽  
Elastic Stress ◽  
Copper Film ◽  
Back Stress ◽  
Vibration Condition ◽  
Pile Up ◽  
Motion Resistance ◽  
Damage Healing ◽  
Healing Model

In this investigation, it is found that the generated elastic stress during the unconstraint vibration treatment process can act as the dislocation driving stress on the dislocation in the micro-scale. When the sum of the dislocation driving stress, the image stress and the back stress exceeds the motion resistance of the dislocations in a pile-up, the dislocations begin to reverse back, and the pile-up disappear. Based on this principle, a fatigue damage-healing model under unconstraint vibration condition was proposed. The verified results showed that the damaged copper film can be effectively healed by the vibration guided by the model calculation.

scholarly journals FES of the effect of free vibration treatment on fatigue damage recovery for notched copper film

2018 ◽  
Vol 165 ◽  
pp. 14008 ◽  
Author(s):  
Hai-Meng Zhang ◽  
De-Guang Shang ◽  
Shuai Lv
Keyword(s):  
Plastic Strain ◽  
Free Vibration ◽  
Dynamic Analysis ◽  
Fatigue Damage ◽  
Copper Film ◽  
Transient Dynamic Analysis ◽  
Vibration Treatment ◽  
Transient Dynamic ◽  
Original Specimen ◽  
Damage Process

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.

A nonlinear fatigue damage-healing model for copper film by LSP

2014 ◽  
Vol 37 (11) ◽  
pp. 1232-1241 ◽  
Author(s):  
L-H. Zhang ◽  
D-G. Shang ◽  
X-D. Liu ◽  
Y-J. Sun ◽  
Y-B. Guo ◽  
...  
Keyword(s):  
Fatigue Damage ◽  
Copper Film ◽  
Damage Healing ◽  
Healing Model

Healing fatigue damage by laser shock peening for copper film

2013 ◽  
Vol 54 ◽  
pp. 127-132 ◽  
Author(s):  
Xiao-Dong Liu ◽  
De-Guang Shang ◽  
Ming Li ◽  
Jia Jin ◽  
Tao Chen ◽  
...  
Keyword(s):  
Fatigue Damage ◽  
Copper Film ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Shock Peening

A unified damage-healing model for laser shock repair of copper film

2014 ◽  
Vol 63 ◽  
pp. 145-153 ◽  
Author(s):  
Xiao-Dong Liu ◽  
De-Guang Shang ◽  
Li-Hong Zhang ◽  
Tao Chen ◽  
Y.B. Guo ◽  
...  
Keyword(s):  
Copper Film ◽  
Laser Shock ◽  
Damage Healing ◽  
Healing Model

Equivalent damage-healing approach to residual fatigue life prediction for copper film by laser repair

2014 ◽  
Vol 24 (5) ◽  
pp. 750-766 ◽  
Author(s):  
Xiao-Dong Liu ◽  
De-Guang Shang ◽  
Li-Hong Zhang ◽  
Yu-Bo Guo ◽  
Yu-Juan Sun ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Copper Film ◽  
Fatigue Life Prediction ◽  
Residual Fatigue Life ◽  
Damage Healing ◽  
Residual Fatigue
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