*COMBINED TEST DATA

Specify simultaneously the normalized shear and bulk compliances or relaxation moduli as functions of time.

This option can be used only in conjunction with the VISCOELASTIC option and cannot be used if the SHEAR TEST DATA and VOLUMETRIC TEST DATA options are used.

This page discusses:

See Also
*VISCOELASTIC
In Other Guides
Time Domain Viscoelasticity

ProductsAbaqus/StandardAbaqus/ExplicitAbaqus/CAE

TypeModel data

LevelModel

Abaqus/CAEProperty module

Optional parameters

SHRINF

To specify creep test data, set this parameter equal to the value of the long-term, normalized shear compliance jS().

To specify relaxation test data, set this parameter equal to the value of the long-term, normalized shear modulus gR().

The shear compliance and shear modulus are related by jS()=1/gR(). The fitting procedure will use the specified value in the constraint 1-i=1Ng¯iP=gR().

VOLINF

To specify creep test data, set this parameter equal to the value of the long-term, normalized volumetric compliance jK().

To specify relaxation test data, set this parameter equal to the value of the long-term normalized volumetric modulus kR(). The volumetric compliance and volumetric modulus are related by jK()=1/kR(). The fitting procedure will use this value in the constraint 1-i=1Nk¯iP=kR().

Data lines to specify creep test data

First line
  1. Normalized shear compliance jS(t),(jS(t)1).

  2. Normalized volumetric (bulk) compliance jK(t),(jK(t)1).

  3. Time t,    (t>0).

Repeat the above data line as often as necessary to give the compliance-time data.

Data lines to specify relaxation test data

First line
  1. Normalized shear modulus gR(t),(0gR(t)1).

  2. Normalized volumetric (bulk) modulus kR(t),(0kR(t)1).

  3. Time t,    (t>0).

Repeat the above data line as often as necessary to give the modulus-time data.