Measurement of dynamic characteristics of metal sheet under laser shock  

作　　者：姚红兵 周祝生 邢博 丁桂林 佟艳群 平洁 季良湾 张永康 

机构地区：[1]School of Mechanical Engineering,Jiangsu University

出　　处：《Chinese Optics Letters》2012年第4期82-84,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.50735001 and 10804037);the special funded projects of China Postdoctoral Science Foundation(No.200902506);the Research Funds of Jiangsu Province Key Laboratory of Photon Manufacture Science and Technology(No.GZ200703)

摘　　要：A new approach is developed to measure the dynamic characteristics of metal sheet under laser shock,including deformation velocity,strain,and strain rate.The detecting laser beam is partially shaded by the target deformation induced by the laser action.A photodiode transforms the received beam intensity real time into an electrical signal which could record the process of the target deformation.The functional relation between the electrical signal and the deformation of the metal sheet is derived.The deformation curve of a thin aluminum and the velocity curve of its deformation are also obtained during the exper-iment.The results indicate that the average velocity of the elastic deformation of the target can reach 2.999×10 3 m/s in the central area.This new method provides an approach in the study of the effect of strain rate on deformation.A new approach is developed to measure the dynamic characteristics of metal sheet under laser shock,including deformation velocity,strain,and strain rate.The detecting laser beam is partially shaded by the target deformation induced by the laser action.A photodiode transforms the received beam intensity real time into an electrical signal which could record the process of the target deformation.The functional relation between the electrical signal and the deformation of the metal sheet is derived.The deformation curve of a thin aluminum and the velocity curve of its deformation are also obtained during the exper-iment.The results indicate that the average velocity of the elastic deformation of the target can reach 2.999×10 3 m/s in the central area.This new method provides an approach in the study of the effect of strain rate on deformation.

关 键 词：Sheet metal Strain rate 

分 类 号：TG115.56[金属学及工艺—物理冶金] TN249[金属学及工艺—金属学]