Shot Peening and Robust Design for Fatigue Performance

Author:  I Nevarez, D Nelson, M Esterman, K Ishii
Source:  Conf Proc: ICSP-6, (p.517-529)
Doc ID:  1996097
Year of Publication:  1996
Abstract:  
atigue data usually display substantial scatter. The goal of this paper is to demonstrate how simulated variations in shot peening parameters and material properties affect the predicted fatigue performance (mean life and scatter) of a component. This is achieved by applying robust design principles to fatigye life evaluation methods. analyzing changes in fatigue performance due to variations in the peening parameters and material properties identified levels of the controllable factors which maximize the mean fatigue life and minimize its scatter. These simulation predictions are consistent with past experimental observations concerning effects of compressive residual stresses on fatigue performance. In addition, the compressive zone depth is identified as a possible off-line production quaility check relating directly to the component fatigue performance. This study is an initial step in the development of a generalized methodology to aid engineers with design for robust fatigye performance for other manufacturing proceses as well.