Experimental Investigation on Shot peen forming of 2198 Al-Li Alloy Plate

Author:  B. Xuepiao, Z. Yuansong, M. Qiang, H. Enguang
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.439-444)
Doc ID:  2014117
Year of Publication:  2014
Abstract:  
Fundamental shot peen forming experiments on Al-Li alloy 2198 plate were carried out to investigate the forming technique of thin skin integral reinforced panels. The effects of air-blast pressure, exposure time and pre-stress level on shaped curvature were investigated by experiment data analysis. The experimental results show that the shaped curvature decreases with exposure time, increases with air-blast pressure and pre-stress level. Exposure time is shown to be the main factor of process parameters affecting shaped curvature. A mathematical equation model for shaped curvature is proposed and was resolved through regression analysis method. A typical structure of fuselage panel was shot peen formed, which verified the effectiveness and accuracy of the mathematical equation model.