INVESTIGATIONS ON LASER SHOCK-PROCESSING (LSP) TO IMPROVE FATIGUE LIFE OF SMALL HOLE IN AIRCRAFT STRUCTURES

作     者：Zhang Yongkang(Institute of Acoustics and Lab of Modern Acoustics,Nanjing University, Nanjing, China, 210093)Yu Chengye(Nanjing University of Aeronautics and Astronautics, Nanjing, China, 210016) 

作者机构：Institute of Acoustics Lab of Modern Acoustics Nanjing University Nanjing 210093 China Nanjing Univ. Aero. and Astronaut. Nanjing 210016 China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：1997年第10卷第1期

页      面：41-45页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 

主　　题：laser shock-processing(LSP) aircraft structures aluminum alloys fatigue life 

摘      要：Laser shock-processing (LSP) is of particular advantage for improving fa-tigue behavior of small holes and blind holes. Because there are not good accessibility andpassage, these holes cannot be treated by shot peening or cold extrusion. The fatigue livesof aircraft aluminum alloy 2024-T62 are increased greatly by means of optimization oflaser shocking parameters. With 95 % confidence, the mean fatigue life of LSP specimensis 4. 35~7, 75 times larger than that of the un-shocked ones.