Investigation on Laser-Induced Shock Pressure with Condensed Matter Model and Experimental Verification

被引：10
作者：
Jiang, X. [1 ]
Yu, X. [1 ]
Deng, X. [1 ]
Shao, Y. [2 ]
Peng, P. [2 ]
机构：
[1] Shanghai Jiao Tong Univ, State Key Lab Adv Opt Commun Syst & Networks, Key Lab Laser Plasmas, Minist Educ,Dept Phys & Astron, Shanghai 200240, Peoples R China
[2] State Grid Shanghai Municipal Elect Power Co, Shanghai, Peoples R China
来源：
EXPERIMENTAL TECHNIQUES | 2019年 / 43卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Laser-induced shock pressure; Laser shock peening; Condensed matter model; Propagation of the shock wave; NUMERICAL-SIMULATION; WAVES; WATER; GENERATION; PLASMA; NS;
D O I：
10.1007/s40799-018-0291-9
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The laser-induced shock wave generated by the water confined regime in laser shock peening and its propagation in the Al2024 alloys are investigated theoretically and experimentally. Based on the condensed matter model, the pressure of plasma induced by homogenous nano-laser pulse is derived analytically and calculated from a simple partial differential equation. Using the derived plasma pressure as the input condition, the propagation of the shock wave in Al2024 is simulated by finite element method. The shock force at the back surface of Al2024 plate with different thickness were measured with polyvinylidene fluoride (PVDF) transducers and recorded by oscilloscope in the LSP experiment. By using water as a cushion at the Al0204-transducer and BK7-transducer interface, the impedance mismatch effect have been severely reduced. The experimental shock force profiles agree well with the simulated results, which indicates the analytical method based on the condensed matter model is an accurate way to conveniently calculate the laser-induced pressure from the laser power density.
引用
收藏
页码：161 / 167
页数：7
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