激光辐照靶材的温升模拟及变形的云纹干涉测试
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摘要: 采用0.15-2.5kA的大电流输出装置,对LY12铝板试件加热,可获得约27~7430℃/s的理论温升率;用高速相机连续实时记录高温动态云纹干涉条纹,获得了1000幅/s的拍摄频率,将这两种技术结合,模拟连续波激光辐照金属靶材产生的温升效应,并对变形过程进行测试,为激光结构破坏机理基础性研究提供了新方法,表明云纹干涉法用于高温动态变形测试完全可行。Abstract: A big electric-current apparatus which can output current of 0.15-0.25kA is discussed, a LY12 aluminium plate is heated by big electric-current, a heating, a heating rate from 27 to 7430℃/s can be obtained, the real-time recording technique of dynamic moire interferometry fringes under high heating rate by a high speed camera is studied, a recording frequency of 1000frame in a second is obtained. The temperature rising effect of structure irradiated by CW high power laser is simulated using both technology. It provides a new way to research some fundamental problems of structural mechanism of fracture. The experimental result indicates that it is possible for moire interferometry to measure dynamic deformation under high temperature condiation.
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