Abstract
A series of fatigue experiments on thin-walled tubes under tension and torsion, the experimental
results – crack path and crack growth life – are measured and compared. It is observed that the cracks follow a
curvature from a tensile to a shear dominated growth with increasing crack length. The results are enforced by
the high amplitudes applied to the specimens causing large cyclic plastic deformations and crack growth rates in the order of 10-3 mm/cycle. The non-linear nature of the cyclic deformation has been taken into account by
applying a cyclic plasticity model, and plasticity-induced crack closure is captured by a contact formulation.
Already for the uniaxial reference case the current limitations in modelling plasticity induced crack closure – a
prerequisite for achieving realistic simulation results – have become obvious. Measurements have shown that
friction and roughness induced closure processes come up, especially for non-planar crack surfaces, challenge to be met in the future.
Keywords
Article history
- ReceivedUntil the next stage: 0 days
- AcceptedUntil the next stage: 0 days
- Published
How to cite
APA
IEEE
MLA
Chicago
Harvard
Vancouver
BibTeX
RIS
Licence
Copyright © 2015 Fracture and Structural Integrity.
Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.
Open Access Statement
Fracture and Structural Integrity (F&SI) is an open-access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author. This is in accordance with the DOAI definition of open access.
F&SI operates under the Creative Commons Licence Attribution 4.0 International (CC-BY 4.0). This allows to copy and redistribute the material in any medium or format, to remix, transform and build upon the material for any purpose, even commercially, but giving appropriate credit, providing a link to the license, and indicating if changes were made.
Similar articles
Most read articles by the same author(s)
- Y. Hos, M. Vormwald, J.L.F. Freire, Measurement and simulation of strain fields around crack tips under mixed-mode fatigue loading , Fracture and Structural Integrity: Vol 9 No 33 (2015): July 2015
- M. Vormwald, Multi-challenge aspects in fatigue due to the combined occurrence of multiaxiality, variable amplitude loading, and size effects , Fracture and Structural Integrity: Vol 9 No 33 (2015): July 2015
- C. Riess, M. Obermayr, M. Vormwald, The non-proportionality of local stress paths in engineering applications , Fracture and Structural Integrity: Vol 10 No 37 (2016): July 2016
- E. Shams, M. Vormwald, Fatigue of weld ends under combined in- and out-of-phase multiaxial loading , Fracture and Structural Integrity: Vol 10 No 38 (2016): October 2016
- M. Vormwald, E. Shams, Sharp three-dimensional notches under combined nominal normal and shear fatigue loading , Fracture and Structural Integrity: Vol 11 No 41 (2017): July 2017
- Y. Hos, M. Vormwald, Growth of long fatigue cracks under non-proportional loadings – experiment and simulation , Fracture and Structural Integrity: Vol 10 No 37 (2016): July 2016