Simulation of shock waves at high repetition rate of laser sparks

2001 ◽  
Vol 31 (4) ◽  
pp. 283-284 ◽  
Author(s):  
V N Tishchenko ◽  
Gennadii N Grachev ◽  
A I Gulidov ◽  
V I Zapryagaev ◽  
V G Posukh
Keyword(s):  
Shock Waves ◽  
Repetition Rate ◽  
High Repetition Rate ◽  
High Repetition

Study of Effect of Repetition Rate on Laser Shock Peening Using Finite Element Modeling

2020 ◽  
Author(s):  
Sai Kosaraju ◽  
Xin Zhao
Keyword(s):  
Shock Wave ◽  
Residual Stress ◽  
Finite Element ◽  
Shock Waves ◽  
Repetition Rate ◽  
High Repetition Rate ◽  
Stress Profile ◽  
Surface Residual Stress ◽  
Residual Stress Profile ◽  
High Repetition

Abstract A two-dimensional finite element model is developed to simulate the interaction between metal samples and laser-induced shock waves. Multiple laser impacts are applied at each location to increase plastically affected depth and compressive stress. The in-depth and surface residual stress profiles are analyzed at various repetition rates and spot sizes. It is found that the residual stress is not sensitive to repetition rate until it reaches a very high level. At extremely high repetition rate (100 MHz), the delay between two shock waves is even shorter than their duration, and there will be shock wave superposition. It is revealed that the interaction of metal with shock wave is significantly different, leading to a different residual stress profile. Stronger residual stress with deeper distribution will be obtained comparing with lower repetition rate cases. The effect of repetition rate at different spot sizes is also studied. It is found that with larger laser spot, the peak compressive residual stress decreases but the distribution is deeper at extremely high repetition rates.

Experimental Study of Characteristics of Discharge Shock Waves in High-Repetition-Rate Excimer Lasers

2019 ◽  
Vol 46 (12) ◽  
pp. 1201001
Author(s):  
刘斌 Liu Bin ◽  
丁金滨 Ding Jinbin ◽  
王魁波 Wang Kuibo ◽  
周翊 Zhou Yi ◽  
江锐 Jiang Rui ◽  
...  
Keyword(s):  
Experimental Study ◽  
Shock Waves ◽  
Repetition Rate ◽  
High Repetition Rate ◽  
Excimer Lasers ◽  
High Repetition

Ti3C2Tx nanosheets for high-repetition-rate wideband-tunable Q-switched fiber laser around 3 μm

2021 ◽  
pp. 1-1
Author(s):  
Liqiang Zhou ◽  
Chen Wei ◽  
Dongsheng Wang ◽  
Hao Chi ◽  
Le Zheng ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Repetition Rate ◽  
High Repetition Rate ◽  
High Repetition
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