Application Of The Shot Peen Forming Process To Sandwich- And Laminate Structures

Author:  G. Hirt, H. Dackweiler
Source:  Conf Proc: ICSP-10 Tokyo, Japan 2008
Doc ID:  2008079
Year of Publication:  2008
Abstract:  
ABSTRACT Sandwich and laminate materials gain increasing importance for high grade, large, thin and multi-dimensional curved structures. This paper details basic as well as additional industrial scale studies about the applicability of the Shot Peen Forming process to the sandwich-material Hylite. Low-speed indentation experiments are used to characterize geometrical and material influences, e.g. of ball size and material state on the indentation diameter. For their interpretation dimensionless values are used. A comparison between monolithic and sandwich materials on the basis of numerical models shows the fundamental difference between them with respect to forming incidents. In forming experiments in an industrial scale peening facility significant concave curvatures and information about their dependency on material, ball size and coverage are achieved which show the potential of the shot peen forming process and its application to this innovative kind of material. KEY WORDS Shot Peen Forming, Sandwich- and Laminate material, Hylite