The Effect of the Free Surface on the Singular Stress Field at the Fatigue Crack Front

0482584 - ÚFM 2019 RIV SK eng J - Článek v odborném periodiku
Oplt, Tomáš - Pokorný, Pavel - Náhlík, Luboš - Hutař, Pavel
The Effect of the Free Surface on the Singular Stress Field at the Fatigue Crack Front.
Strojnický časopis. Roč. 67, č. 2 (2017), s. 69-76. ISSN 0039-2472
Grant CEP: GA MPO(CZ) EG15_019/0002421
Institucionální podpora: RVO:68081723
Klíčová slova: fatigue crack * stress singularity exponent * vertex singularity * crack front shape
Obor OECD: Audio engineering, reliability analysis

Description of stress singularity in the vicinity of a free surface is presented. Its presence causes the retardation of the fatigue crack growth in that region and fatigue crack is being curved. Numerical model is used to study dependence of the stress singularity exponent on Poisson’s ratio. Estimated values are compared to those already published. Experimentally measured angles of fatigue crack on SENB specimens confirm the relation between Poisson’s ratio and the angle between crack front and free surface.
Trvalý link: http://hdl.handle.net/11104/0289453