Evaluation of stress intensity factors under multiaxial and compressive conditions using low order displacement or stress field fitting
Artikel i vetenskaplig tidskrift, 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

Författare

Robin Andersson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Fredrik Larsson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Elena Kabo

Qamcom Research & Technology

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Engineering Fracture Mechanics

0013-7944 (ISSN)

Vol. 189 204-220

Ämneskategorier

Maskinteknik

Teknisk mekanik

Farkostteknik

Styrkeområden

Transport

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1016/j.engfracmech.2017.11.015