3D Connexion Version 6.6

*MOHR COULOMB

13.16 *MOHR COULOMB: Specify the Mohr-Coulomb plasticity model.

This option is used to deﬁne the yield surface and ﬂow potential parameters for elastic-pla stic materials

that use the Mohr-Coulomb plasticity model. It must be used in conjunction with the *MOHR COULOMB

HARDENING option.

Product: ABAQUS/Standard

Type: Model data

Level: Model

References:

•“Mohr-Coulomb plasticity,”Section 18.3.3 of the ABAQUS Analysis User’s Manual

•*MOHR COULOMB HARDENING

Optional parameters:

DEPENDENCIES

Set this parameter equal to the number of ﬁeld variable depende ncies included in the deﬁnition

of the material parameters other than temperature. If this parameter is omitted, it is assumed that

the material properties are constant or depend only on temperature. See “Specifying ﬁeld variable

dependence”in “Material data deﬁnition,” Section 16.1.2 of the ABAQUS Analysis User’s Manual,

for more information.

DEVIATORICECCENTRICITY

Set this parameter equal to the ﬂow potential eccentricity in the deviatoric plane, e. This feature

allows the shape of ﬂow potential in the deviatoricstress space to be controlled independently of

the angle of friction. If this parameter is omitted, the deviatoric eccentricity is calculated by default

as ,where is the Mohr-Coulomb angle of friction deﬁned on the data

lines. The range of values ecan have is .

ECCENTRICITY

Set thisparam eter equalto the ﬂow potential eccentricity in the meridional plane, . Themeridional

eccentricity is a small positive number that deﬁnes the rateat which the ﬂow potential approaches

its asymptote. The default is .

Data lines to deﬁne a Mohr-Coulomb plasticity model:

First line:

1. Frictionangle , ,athighconﬁningpressureinthep–plane. Give the value in degrees.

13.16–1

ABAQUS Version 6.1 Module: ID:

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