文献类型：期刊文献

英文题名：Study of the mechanism of overlays acting on laser shock waves

作者：Zhang, Yongkang[1,2]; Gu, Yongyu[2]; Zhang, Xingquan[2]; Shi, Jianguo[2]; Zhou, Jun[2]

机构：[1]Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Peoples R China;[2]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2006

卷号：100

期号：10

外文期刊名：JOURNAL OF APPLIED PHYSICS

收录：;EI(收录号：20064910294861);WOS:【SCI-EXPANDED(收录号:WOS:000242408000028)】；

语种：英文

外文关键词：Elastic moduli - Electromagnetic wave attenuation - Laser produced plasmas - Pressure effects - Reflection

摘要：In laser shock processing, overlays are used to enhance peak pressures and prolong pulse widths of laser shock waves. The overlay usually has three types: rigid, flexible, and liquid overlays. In this paper, some mathematical models are constructed to analyze the process of laser-induced shock waves and pressure attenuations of the shock waves. The analyses indicate that the peak pressure of shock waves depends on the deformation amount of the overlays and the pressure attenuations depend on the deformation speed of the overlays, while the deformation amount and deformation speed are determined by the density and thickness of the overlays. Besides, for the rigid overlay, the elastic modulus must be taken into account in addition to its density and thickness. Furthermore, the reflected waves from the overlays enhance the shocking effects of laser-induced shock waves. Therefore, the rigid overlays are superior to the flexible and liquid overlays. (c) 2006 American Institute of Physics.