Fatigue Damage Analysis Of Welded Structures Based On Continuum Damage Mechanics
Price
Free (open access)
Transaction
Volume
40
Pages
12
Published
2003
Size
496.50 kb
Paper DOI
10.2495/FDM030291
Copyright
WIT Press
Author(s)
K. Thepvongsa, Y. Sonoda & H. Hikosaka
Abstract
Fatigue damage analysis of welded structures based on continuum damage mechanics K. Thepvongsa, Y. Sonoda & H. Hikosaka Department of Civil Engineering, Kyushu University, Japan Abstract In this study, the fatigue damage analysis and life prediction of welded structures are carried out by using continuum damage mechanics. For high cycle fatigue, it is considered that plastic deformation and damage occurs at a microscopic scale. Therefore, a two-scale model presented by Lemaitre is introduced to evaluate the high cycle fatigue damage evolution. As it is difficult to identify the parameters directly at the micro scale, the identification method is proposed to obtain the reliable material parameters for weldment. In order to consider the effect of residual stress on fatigue behavior of welded joints, the inherent strain method is applied to determine the residual stress. The analytical results by the proposed method are compared to experimental results and it is confirmed that the proposed method
Keywords