Computational homogenisation for thermoviscoplasticity: application to thermally sprayed coatings

Research output: Contribution to journalArticle

Abstract

Metal forming processes require wear-resistant tool surfaces in order to ensure a long life cycle of the expensive tools together with a constant high quality of the produced components. Thermal spraying is a relatively widely applied coating technique for the deposit of wear protection coatings. During these coating processes, heterogeneous coatings are deployed at high temperatures followed by quenching where residual stresses occur which strongly influence the performance of the coated tools. The objective of this article is to discuss and apply a thermo-mechanically coupled simulation framework which captures the heterogeneity of the deposited coating material. Therefore, a two-scale finite element framework for the solution of nonlinear thermo-mechanically coupled problems is elaborated and applied to the simulation of thermoviscoplastic material behaviour including nonlinear thermal softening in a geometrically linearised setting. The finite element framework and material model is demonstrated by means of numerical examples.

Details

Authors
Organisations
External organisations
  • Technical University of Dortmund
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Tribology

Keywords

  • Finite element method, Homogenisation, Multiscale modelling, Thermomechanics, Thermoviscoplasticity
Original languageEnglish
Pages (from-to)739-766
JournalComputational Mechanics
Volume60
Issue number5
Early online date2017 Jul 8
Publication statusPublished - 2017 Nov
Publication categoryResearch
Peer-reviewedYes