<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></abstract>

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.

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

Faculty of Mechanical Engineering, Brno University of Technology

Institute of Solid Mechanics, Mechatronics and Biomechanics

Institute of Physics of Materials of the Academy of Sciences of the Czech Republic

Strojnícky časopis - Journal of Mechanical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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...

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

Pubblicato online: 18 nov 2017

Pagine: 69 - 76

DOI: https://doi.org/10.1515/scjme-2017-0019

Parole chiave
fatigue crack, stress singularity exponent, vertex singularity, crack front shape

© 2017 Tomáš Oplt et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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

Pubblicato online: 18 nov 2017

Pagine: 69 - 76

DOI: https://doi.org/10.1515/scjme-2017-0019

Parole chiavefatigue crack, stress singularity exponent, vertex singularity, crack front shape

© 2017 Tomáš Oplt et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Parole chiave
fatigue crack, stress singularity exponent, vertex singularity, crack front shape