3D Connexion Version 6.6

*MULLINS EFFECT

cannot be speciﬁed if both the R and M parameters are also speciﬁed (use the data line instead to

specify all three parameters). If this parameter is omitted, will be determine dfr om a nonlinear,

least-squaresﬁt of the test data. Allowablevaluesof BETA are . The M and BETA parameters

cannot both be zero.

DEPENDENCIES

Set this parameter equal to the number of ﬁeld variables, in addition to temperature, on which the

materialparametersdepend. If this parameteris omitted,it is assumed that thematerial parameters

are constant or depend only on temperature. See “Spe cifying ﬁeld variable dependence” in

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

information.

This parameter is not relevant if the USER or the TEST DATA INPUT parameter is included.

This parameter can be used only when the TEST DATA INPUT parameter is used; it deﬁnes the

value of while the other coefﬁcients of the Mullinseffect model are ﬁtted from the test data. It

cannot be speciﬁed if both the R and BETA parameters are also speciﬁed (use the data line instead

to specify all three parameters). Ifthis parameter is omitted, will be determined from a nonlinear,

least-squares ﬁt of the testdata. Allowable values of Mare . The M and BETA parameters

cannot both be zero.

PROPERTIES

This parameter applies only to ABAQUS/Standard analys es.

This parameter can be used only if the USER parameter is speciﬁed. Set this parameter equal

to the number of property values needed as data in user s ubroutine UMULLINS. The default value

is 0.

This parameter can be used only when the TEST DATA INPUT parameter is used; it deﬁnes the

value of while the other coe fﬁcients of the Mullins effect model are ﬁtted from the test data. It

cannot be speciﬁed if both the M and BETA parameters are also speciﬁed (use the data li ne instead

to specify all three parameters). If this parameter is omitted, will be determined from a nonlinear,

least-squares ﬁt of the test data. Allowable values of R are .

To deﬁne the materialbehavior by giving test data:

No data lines are used with this option when the TEST DATA INPUT parameter is speciﬁed.

The data are given instead under the *BIAXIAL TEST DATA, *PLANAR TEST DATA, and

*UNIAXIAL TEST DATAoptions. These options are applicable except for the case where the

damage variable is deﬁned by the user.

13.23–2

ABAQUS Version 6.1 Module: ID:

Printed on: