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101

MOHR COU LOMB HARDENING

13.17

MOHR COULOMB HARDENING: Specify hardening for the Mohr-Coulomb plasticity

model.

This option is used to deﬁne piecewise linear hardening/softening behavior for a m aterial deﬁned by the Mohr-

Coulomb plasticity model. It must be used in conjunction with the

MOHR COULOMB option.

Product: ABAQUS/Standard

Type: Model data

Level: Model

References:

•

“Mohr-Coulom b plasticity,” Section 18.3.3 of the ABAQ US Analysis User’s M anual

• *

MOHR COULOMB

Optional parameter:

DEPENDENCIES

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

the cohesion yield stress, in addition t o temperature. If this parameter is omitted, it is assume d

that the cohesion yield stress depends only on the plastic strain and, possibly, 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.

Data lines to deﬁne Mohr-Coulomb hardening:

First line:

1. Cohesion yield stress.

2. Absolute value of the corresponding plastic strain. (The ﬁrst tabular value entered must always

be zero.)

3. Temperature.

4. First ﬁeld variable.

5. Second ﬁeld variable.

6. Etc.,uptoﬁveﬁeldvariables.

Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than ﬁve):

1. Sixth ﬁeld variable.

13.17–1

ABAQUS Version 6.1 Module:

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Abaqus Volume II: I–Z Manual do Utilizador Página 161

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