An energy-conserving cycle jump and load application technique for high-cycle fatigue simulations under general loading conditions

Research output: Contribution to book/conference proceedings/anthology/reportConference contributionContributedpeer-review

Contributors

Abstract

For high cycle fatigue simulations, cyclic loads are often replaced by constant envelope loads using a cycle jump technique. However, this simplification cannot be used under general loading conditions where the local stress ratios can substantially deviate from global load ratios. The local stress ratios have to be determined for every material point individually by periodically performing a full loadingunloading cycle. Usually, commercial finite element (FE) solvers use time integration methods that are not energy-conserving, so that the simulation of such a loading-unloading cycle produces a numerical energy error. In this contribution, a new cycle jump and load application technique for high cycle fatigue simulations under general loading conditions is presented. It combines the simulation of full load cycles to determine local stress ratios with cycle jumps to save computational costs. The new technique is characterized by its energy-conserving behavior which is reached by a complete unloading of the FE model after each cycle jump and a modified formulation of the element residual vectors. By using userdefined elements, this modified formulation can also be used with commercial FE solvers.

Details

Original languageEnglish
Title of host publicationECCM21 - Proceedings of the 21st European Conference on Composite Materials
PublisherEuropean Society for Composite Materials (ESCM)
Pages713-717
Number of pages5
Volume3
ISBN (print)978-2-912985-01-9
Publication statusPublished - 2 Jul 2024
Peer-reviewedYes

Conference

Title21st European Conference on Composite Materials
Abbreviated titleECCM 21
Conference number21
Duration2 - 5 July 2024
Website
Degree of recognitionInternational event
LocationLa Cité Nantes Congress Centre
CityNantes
CountryFrance

External IDs

ORCID /0000-0003-1370-064X/work/162844926
Mendeley 3bad8b9f-1bb4-31d2-bb88-4fa985624ef2

Keywords

Keywords

  • cycle jump technique, fatigue damage modelling, cohesive zone models, woven composites, segmentation, synthetic training data, x-ray computed tomography