Thermodynamic formulation of a material model for microcracking applied to creep damage

Kari Santaoja

doi:10.1016/j.mspro.2014.06.192

Thermodynamic formulation of a material model for microcracking applied to creep damage

Kari Santaoja

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Abstract

A Hookean material containing an increasing number of non-interacting microcracks is studied from the aspect of continuum thermodynamics. Rectilinear microcracks in a two-dimensional body are examined. The former model by Basista (2003) is enhanced to describe the response of microcracks to compression. Microcrack densities introduced here enter into the formulation of continuum thermodynamics as internal variables. The strong physical foundation of these internal variables makes them more attractive quantities for damage mechanics than variable damage, the physical background of which is sometimes unclear. The model is coded as an Abaqus VUMAT subroutine and applied to the creep of ice.

Original language	English
Pages (from-to)	1179-1184
Journal	Procedia Materials Science
Volume	3
DOIs	https://doi.org/10.1016/j.mspro.2014.06.192
Publication status	Published - 2014
MoE publication type	A1 Journal article-refereed
Event	European Conference on Fracture - NTNU, Trondheim, Norway Duration: 30 Jun 2014 → 4 Jul 2014 Conference number: 20

Keywords

Abaqus VUMAT
Clausius-Duhem inequality
ice
material modelling
microcracking
specific Gibbs free energy
thermodynamics

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10.1016/j.mspro.2014.06.192

1-s2.0-S221181281400193X-mainFinal published version, 386 KBLicence: CC BY-NC-ND

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title = "Thermodynamic formulation of a material model for microcracking applied to creep damage",

abstract = "A Hookean material containing an increasing number of non-interacting microcracks is studied from the aspect of continuum thermodynamics. Rectilinear microcracks in a two-dimensional body are examined. The former model by Basista (2003) is enhanced to describe the response of microcracks to compression. Microcrack densities introduced here enter into the formulation of continuum thermodynamics as internal variables. The strong physical foundation of these internal variables makes them more attractive quantities for damage mechanics than variable damage, the physical background of which is sometimes unclear. The model is coded as an Abaqus VUMAT subroutine and applied to the creep of ice.",

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author = "Kari Santaoja",

note = "VK: T20403; European Conference on Fracture, ECF ; Conference date: 30-06-2014 Through 04-07-2014",

year = "2014",

doi = "10.1016/j.mspro.2014.06.192",

language = "English",

volume = "3",

pages = "1179--1184",

journal = "Procedia Materials Science",

issn = "2211-8128",

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T1 - Thermodynamic formulation of a material model for microcracking applied to creep damage

AU - Santaoja, Kari

N1 - Conference code: 20

PY - 2014

Y1 - 2014

N2 - A Hookean material containing an increasing number of non-interacting microcracks is studied from the aspect of continuum thermodynamics. Rectilinear microcracks in a two-dimensional body are examined. The former model by Basista (2003) is enhanced to describe the response of microcracks to compression. Microcrack densities introduced here enter into the formulation of continuum thermodynamics as internal variables. The strong physical foundation of these internal variables makes them more attractive quantities for damage mechanics than variable damage, the physical background of which is sometimes unclear. The model is coded as an Abaqus VUMAT subroutine and applied to the creep of ice.

AB - A Hookean material containing an increasing number of non-interacting microcracks is studied from the aspect of continuum thermodynamics. Rectilinear microcracks in a two-dimensional body are examined. The former model by Basista (2003) is enhanced to describe the response of microcracks to compression. Microcrack densities introduced here enter into the formulation of continuum thermodynamics as internal variables. The strong physical foundation of these internal variables makes them more attractive quantities for damage mechanics than variable damage, the physical background of which is sometimes unclear. The model is coded as an Abaqus VUMAT subroutine and applied to the creep of ice.

KW - Abaqus VUMAT

KW - Clausius-Duhem inequality

KW - ice

KW - material modelling

KW - microcracking

KW - specific Gibbs free energy

KW - thermodynamics

KW - Abaqus VUMAT

KW - Clausius-Duhem inequality

KW - ice

KW - material modelling

KW - microcracking

KW - specific Gibbs free energy

KW - thermodynamics

KW - Abaqus VUMAT

KW - Clausius-Duhem inequality

KW - ice

KW - material modelling

KW - microcracking

KW - specific Gibbs free energy

KW - thermodynamics

U2 - 10.1016/j.mspro.2014.06.192

DO - 10.1016/j.mspro.2014.06.192

M3 - Article

SN - 2211-8128

VL - 3

SP - 1179

EP - 1184

JO - Procedia Materials Science

JF - Procedia Materials Science

T2 - European Conference on Fracture

Y2 - 30 June 2014 through 4 July 2014

ER -

Thermodynamic formulation of a material model for microcracking applied to creep damage

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Keywords

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