Study of the mechanism of overlays acting on laser shock waves

作     者：Zhang, Yongkang Gu, Yongyu Zhang, Xingquan Shi, Jianguo Zhou, Jun 

作者机构：Jiangsu Univ Sch Mech Engn Zhenjiang 212013 Peoples R China E China Univ Sci & Technol Sch Mech & Power Engn Shanghai 200237 Peoples R China 

出 版 物：《JOURNAL OF APPLIED PHYSICS》 (应用物理学杂志)

年 卷 期：2006年第100卷第10期

页      面：103517-103517-6页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：863 HI-TECH, (2002AA336030) National Natural Science Foundation of China, NSFC, (50275068, 50475127) National Natural Science Foundation of China, NSFC 

主　　题：SHOCK waves LASER materials PULSE-width modulation ELASTIC analysis (Engineering) DEFORMATIONS (Mechanics) ATTENUATION (Physics) 

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.