Investigation on 3D fatigue crack propagation in surface-cracked specimens
In the present work the fatigue crack growth in AISI304 specimens is investigated experimentally.In 3D finite element analysis the virtual crack closure technique is applied to calculate distributions and variations of the stress intensity factor along the surface crack front.It is confirmed that the stress intensity factor along the surface crack front non-uniformly varies with crack growth.Crack growth rate is proportional to the stress intensity factor distribution in the 3D cracked specimen.The fatigue crack growth in surface cracked specimens can be described by the Forman model identified in conventional CT specimens.For crack growth in the free specimen surface the arc length seems more suitable to quantify crack progress.Geometry and loading configuration of the surface cracked specimen seem to not affect the fatigue crack growth substantially.
Surface crack crack front fatigue crack growth 3D stress intensity factor
X. Li H. Yuan J.Y. Sun
Department of Mechanical Engineering,University of Wuppertal,Germany
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）