University of Oulu

Frondelius, T., Holopainen, S., Kouhia, R., Ottosen, N., Ristinmaa, M., Vaara, J. (2019) A continuum based macroscopic unified low-and high cycle fatigue model. In ICMFF12 - 12th International Conference on Multiaxial Fatigue and Fracture, 300, 16008. https://doi.org/10.1051/matecconf/201930016008

A continuum based macroscopic unified low-and high cycle fatigue model

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Author: Frondelius, Tero1,2; Holopainen, Sami3; Kouhia, Reijo3;
Organizations: 1Wärtsilä Finland Oy, Järvikatu 2-4, FI-65100 Vaasa, Finland
2Oulu University
3Tampere University, P.O. Box 600, FI-33014 Tampere University, Finland
4Lund University, P.O. Box 117, SE-22100 Lund, Sweden
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.2 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2020112092210
Language: English
Published: EDP Sciences, 2019
Publish Date: 2020-11-20
Description:

Abstract

In this work, an extension of a previously developed continuum based high-cycle fatigue model is enhanced to also capture the low-cycle fatigue regime, where significant plastic deformation of the bulk material takes place. Coupling of the LCFand HCF-models is due to the damage evolution equation. The high-cycle part of the model is based on the concepts of a moving endurance surface in the stress space with an associated evolving isotropic damage variable. Damage evolution in the low-cycle part is determined via plastic deformations and endurance function. For the plastic behaviour a non-linear isotropic and kinematic hardening J2-plasticity model is adopted. Within this unified approach, there is no need for heuristic cycle-counting approaches since the model is formulated by means of evolution equations, i.e. incremental relations, and not changes per cycle. Moreover, the model is inherently multiaxial and treats the uniaxial and multiaxial stress histories in the same manner. Calibration of the model parameters is discussed and results from some test cases are shown.

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Series: MATEC web of conferences
ISSN: 2274-7214
ISSN-E: 2261-236X
ISSN-L: 2261-236X
Article number: 16008
DOI: 10.1051/matecconf/201930016008
OADOI: https://oadoi.org/10.1051/matecconf/201930016008
Host publication: ICMFF12 - 12th International Conference on Multiaxial Fatigue and Fracture
Type of Publication: A4 Article in conference proceedings
Field of Science: 214 Mechanical engineering
Subjects:
Funding: This research has been supported in part by Business Finland (former Tekes - the National Technology Agency of Finland), project MaNuMiES, project 3361/31/2015 and WIMMA 1566/31/2015.
Copyright information: © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).
  https://creativecommons.org/licenses/by/4.0/