Metafor

ULiege - Aerospace & Mechanical Engineering

User Tools

Site Tools


doc:user:elements:volumes:thixo_iso_hypo_materials

Thixotropic materials

ThixoEvpIsoHHypoMaterial

Description

Elasto-visco-plastic law with nonlinear hardening, temperature set in a way specific for thixotropic materials.

Stresses are integrated with a radial return method. The stiffness tangent matrix is analytic and numerical

The yield stress must verify the constraint:

$$ f=\overline{\sigma}-\sigma_{yield}=0 $$

where $ \overline{\sigma}$ is the equivalent stress computed and $ \sigma_{yield} $ is a yield stress specific for thixotropic materials.

Parameters

Name Metafor Code Dependency
Density MASS_DENSITY -
Young modulus ELASTIC_MODULUS TM
Poisson ratio POISSON_RATIO -
Thermal expansion THERM_EXPANSION TM
Number of the material law which defines the yield stress $\sigma_{yield}$ YIELD_NUM -
Evolution law of the material temperature TEMP TM
Number of the plastic criterion
(by default, a VonMisesPlasticCriterion)
PLASTICCRITERION_NUM -
Objectivity Method
(Jaumann = 0, GreenNaghdi = 1)
OBJECTIVITY -
Orthotropic axis ORTHO_AX1_X -
Orthotropic axis ORTHO_AX1_Y -
Orthotropic axis ORTHO_AX1_Z -
Orthotropic axis ORTHO_AX2_X -
Orthotropic axis ORTHO_AX2_Y -
Orthotropic axis ORTHO_AX2_Z -

ThixoTmEvpIsoHHypoMaterial

Description

Same as ThixoEvpIsoHHypoMaterial but including thermal effects.

Parameters

Name Metafor Code Dependency
Solid phase density MASS_DENSITY TO/TM
Liquid phase density MASS_DENSITY_LIQ TO/TM
Young modulus ELASTIC_MODULUS TO/TM
Poisson ratio POISSON_RATIO TO/TM
Thermal expansion THERM_EXPANSION TO/TM
Number of the material law which defines the yield stress $\sigma_{yield}$ YIELD_NUM -
Conductivity CONDUCTIVITY TO/TM
Solid phase heat capacity HEAT_CAPACITY TO/TM
Solid phase heat capacity HEAT_CAPACITY_LIQ TO/TM
Dissipated thermoelastic power fraction DISSIP_TE -
Dissipated (visco)plastic power fraction (Taylor-Quinney factor) DISSIP_TQ -
Latent heat LATENT_HEAT /
Number of the plastic criterion
((by default, VonMisesPlasticCriterion)
PLASTICCRITERION_NUM -
Objectivity method
(Jaumann = 0, GreenNaghdi = 1)
OBJECTIVITY -
Orthotropic axis ORTHO_AX1_X -
Orthotropic axis ORTHO_AX1_Y -
Orthotropic axis ORTHO_AX1_Z -
Orthotropic axis ORTHO_AX2_X -
Orthotropic axis ORTHO_AX2_Y -
Orthotropic axis ORTHO_AX2_Z -
doc/user/elements/volumes/thixo_iso_hypo_materials.txt · Last modified: 2016/03/30 15:23 (external edit)