A Model for Determining Crack Opening Stress Intensity Factor Ratio under Tri-Axial Stress State

Abstract:

When studying 3D fatigue crack growth behaviors of materials, to determine the crack opening stress intensity factor ratio is the key issue. Elastic-plastic Fracture Mechanics theory and physical mechanism of cracks’ closure phenomena caused by plastic deformation are employed here. A model for determining the crack opening stress intensity factor ratio under tri-axial stress state is presented. The comparison of the present model with available data and models shows quite good agreement.

• Periodical: Key Engineering Materials (Volumes 297-300)
• Pages: 1572-1578
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.297-300.1572
• Online since: November 2005
• Authors: Yu Ting He, Feng Li, Rong Shi, G.Q. Zhang, L.J. Ernst, X.J. Fu
• Keywords: Crack Closure Factor, Crack Opening Stress Intensity Factor Ratio, Crack Tip Opening Displacement (CTOD), Ĵ-Integral, Stress Ratio, Tri-Axial Stress State

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