You are here
Isogeometric boundary element methods for three dimensional fatigue crack growth
Isogeometric boundary element methods for three dimensional fatigue crack growth
http://hdl.handle.net/10993/22289
The isogeometric boundary element method (IGABEM) based on NURBS is adopted to model fracture problem in 3D. The NURBS basis functions are used in both crack representation and physical quantity approximation. A stable quadrature scheme for singular integration is proposed to enhance the robustness of the method in dealing with highly distorted element. The convergence study in crack opening displacement is performed for penny-shaped crack and elliptical crack. Two ways to extract stress intensity factors (SIFs), the contour $M$ integral and virtual crack closure integral, are implemented based on the framework of dual integral equations. An algorithm is outlined and validated to be stable for fatigue crack growth, thanks to the smoothness not only in crack geometry but also in stress/SIFs solution brought by IGABEM.
http://orbilu.uni.lu/bitstream/10993/22289/2/penny%20crack%20growth.avi
http://orbilu.uni.lu/bitstream/10993/22289/3/elliptical%20crack%20growth.avi
penny crack growth elliptical crack growth
Thank you to Xuan Peng, PhD Student on the ITN INSIST Project, and to Elena Atroshchenko.
Stéphane Bordas
- Stephane Bordas's blog
- Log in or register to post comments
- 2156 reads
Recent comments