Analysis on the fatigue damage evolution of notched specimens with consideration of cyclic plasticity. Issue 10 (16th March 2015)

• Record Type: Journal Article
• Authors: Shen, F.; Voyiadjis, G. Z.; Hu, W.; Meng, Q.
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 38:Issue 10(2015:Oct.)
• Page Start: 1194
• Page End: 1208
• Publication Date: 2015-03-16
• Subjects: Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.12299
• Languages: English
• ISSNs: 8756-758X

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>This paper presents a damage mechanics method applied successfully to assess fatigue life of notched specimens with plastic deformation at the notch tip. A damage‐coupled elasto‐plastic constitutive model is employed in which nonlinear kinematic hardening is considered. The accumulated damage is described by a stress‐based damage model and a plastic strain‐based damage model, which depend on the cyclic stress and accumulated plastic strain, respectively. A three‐dimensional finite element implementation of these models is developed to predict the crack initiation life of notched specimens. Two cases, a notched plate under tension‐compression loadings and an SAE notched shaft under bending‐torsion loadings including non‐proportional loadings, are studied and the predicted results are compared with experimental data.</p> </abstract>