Reference Type:  Journal Article
Record Number: 1
Author: Xiong, Y., Katsuta, J., Kawano, K. and Sakiyama, T.
Year: 2005
Title: The effects of elasto-plastic behavior at the crack tip on fatigue crack propagation
Journal: Advanced Steel Construction
Volume: 1
Issue: 2
Pages: 10
Start Page: 55
Short Title: The effects of elasto-plastic behavior at the crack tip on fatigue crack propagation
DOI: 10.18057/IJASC.2005.1.2.4
Keywords: Fatigue crack propagation, Crack tip, Opening/closure, Hysteresis loop, compressive plastic zone, Variable amplitude loading.
Abstract: Emphasis on physical meanings of the hysteresis loop denoting the relationship between loads and strainsnear the crack tip, variations of the loading tensile plastic load zone and the unloading compressive plastic load zone are studied respectively under various fatigue test conditions, and the effects on acceleration, deceleration and non-propagation during fatigue crack propagation are also studied. Two types of crack closure are obtained from tests, and the influence of each load zone of the hysteresis loop on fatigue crack propagation is evaluated. Result shows that load zones PRPG~Pmax and PRCPG~PCF play an important role in the crack opening/closure behavior, and the fatigue crack propagates difficultly if the compressive plastic zone at the crack tip is not enough.
Author Address: Department of Structural Engineering, Faculty of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan