Influence of holes on fatigue crack propagation path
ZHENG Wentao
CHEN Jinghua
LI Tian
Abstract：In order to study the influence of hole location and size on fatigue crack propagation path,ABAQUS finite element simulation software was used to establish the simulation model of crack propagation for modified CT samples.By using the extended finite element method(XFEM),the influence of the angle and distance between the circular hole and the crack tip as well as the radius of circular hole on the crack propagation path of Q235 steel under low cycle fatigue was studied.By introducing the crack deflection coefficient,the influence of different parameters on the deflection degree of crack propagation path was described quantitatively.The results show that the crack deflection coefficient reaches the maximum value when the angle between the crack tip and the circular hole is 45°.The crack deflection coefficient increases with the increase of hole radius,while decreases with the increase of the distance between circular hole and crack tip.
Keywords：holecrack propogationlow cycle fatiguecrack deflection behaviorextended finite element methodstress field at crack tipsimulationcrack deflection coefficient
Publication Date：2024-03-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 177-183 )