A stress integration algorithm for phase transforming steels

Emin Semih Perdahcioglu; Hubertus J.M. Geijselaers; Han Huetink

A stress integration algorithm for phase transforming steels

Emin Semih Perdahcioglu, Hubertus J.M. Geijselaers, Han Huetink

Faculty of Engineering Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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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 language	Undefined
Title of host publication	Complas 2007
Pages	-
Number of pages	4
Publication status	Published - 2007
Event	9th International Conference on Computational Plasticity. Fundamentals and Applications, COMPLAS 2007 - Barcelona, Spain Duration: 5 Sep 2007 → 7 Sep 2007 Conference number: 9

Conference

Conference	9th International Conference on Computational Plasticity. Fundamentals and Applications, COMPLAS 2007
Abbreviated title	COMPLAS 2007
Country	Spain
City	Barcelona
Period	5/09/07 → 7/09/07

Keywords

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

Access to Document

stress_integration
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Cite this

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title = "A stress integration algorithm for phase transforming steels",

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.",

keywords = "IR-69670, METIS-263669, Onderzoek van algemene industriele aardMechanical engineering and technology",

author = "Perdahcioglu, {Emin Semih} and Geijselaers, {Hubertus J.M.} and Han Huetink",

year = "2007",

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note = "null ; Conference date: 05-09-2007 Through 07-09-2007",

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TY - GEN

T1 - A stress integration algorithm for phase transforming steels

AU - Perdahcioglu, Emin Semih

AU - Geijselaers, Hubertus J.M.

AU - Huetink, Han

N1 - Conference code: 9

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

KW - IR-69670

KW - METIS-263669

KW - Onderzoek van algemene industriele aardMechanical engineering and technology

M3 - Conference contribution

SP - -

BT - Complas 2007

Y2 - 5 September 2007 through 7 September 2007

ER -