A stress integration algorithm for phase transforming steels

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Abstract

A new stress integration algorithm for the constitutive models of materials that undergo strain-induced phase transformation is presented. The most common materials that fall into this category are metastable austenitic stainless (TRIP) steels. These materials can be classi¯ed as metal-matrix composites which comprise a soft and a hard metallic phase. A homogenization algorithm is presented that can estimate the evolution of state variables in each phase for a given strain increment. The elastic-plastic behavior of the phases are calculated individually using large deformation theory and the calculated algorithmic tangent moduli are used in different homogenization schemes. Furthermore, the phase transformation process in austenitic stainless steels involves a volumetric expansion and an inelastic shape change collinear with the deviatoric stress. This transformation plasticity is approximated by a phenomenological model and incorporated in the stress update algorithm.
Original languageUndefined
Title of host publicationComplas 2007
Pages-
Number of pages4
Publication statusPublished - 2007
Event9th International Conference on Computational Plasticity. Fundamentals and Applications, COMPLAS 2007 - Barcelona, Spain
Duration: 5 Sep 20077 Sep 2007
Conference number: 9

Conference

Conference9th International Conference on Computational Plasticity. Fundamentals and Applications, COMPLAS 2007
Abbreviated titleCOMPLAS 2007
CountrySpain
CityBarcelona
Period5/09/077/09/07

Keywords

  • IR-69670
  • METIS-263669
  • Onderzoek van algemene industriele aardMechanical engineering and technology

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