Evaluation of stress intensity factors under multiaxial and compressive conditions using low order displacement or stress field fitting
Journal article, 2018

A methodology for evaluation of stress intensity factors from the asymptotic displacement (or stress) fields at a crack front is proposed. The methodology strives to be of practical use in conjunction with commercial FE-codes, also when approaches such as XFEM are employed. To this end, the matching of the fields is carried out through a minimalistic, low order, ansatz of the displacement and stress fields. As demonstrated, the proposed methodology can deal with multiaxial loading of curved crack fronts in three-dimensional bodies. The methodology shows good accuracy also for compressive loading when crack face friction can be neglected.

Linear elastic fracture mechanics

Stress intensity factors

Least squares fitting

XFEM

Contact loading

Author

Robin Andersson

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Fredrik Larsson

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Elena Kabo

Qamcom Research & Technology

Chalmers, Mechanics and Maritime Sciences, Dynamics

Engineering Fracture Mechanics

0013-7944 (ISSN)

Vol. 189 204-220

Subject Categories

Mechanical Engineering

Applied Mechanics

Vehicle Engineering

Areas of Advance

Transport

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1016/j.engfracmech.2017.11.015

More information

Latest update

6/11/2018