Products: Abaqus/Explicit Abaqus/CAE
Benefits: You can now model rate-dependent traction-separation behavior in Abaqus/Explicit.
Description: In Abaqus/Explicit, time domain viscoelasticity can now be used to model rate-dependent behavior of cohesive elements with traction-separation elasticity. The evolution equations for the normal and two shear nominal tractions take the form:
, 
, and 
are the instantaneous nominal tractions at time t in the normal and the two local shear directions, respectively. The functions 
and 
represent the dimensionless shear and normal relaxation moduli, respectively. Shear relaxation is supposed to be isotropic and independent on the direction of shearing. See “Defining viscoelastic behavior for traction-separation elasticity in Abaqus/Explicit” in “Time domain viscoelasticity,” Section 22.7.1 of the Abaqus Analysis User's Manual, for additional details. Time domain viscoelasticity can also be used in combination with the models for progressive damage and failure available for cohesive elements with traction-separation behavior (“Defining the constitutive response of cohesive elements using a traction-separation description,” Section 32.5.6 of the Abaqus Analysis User's Manual). This combination allows modeling rate-dependent behavior both during the initial elastic response (prior to damage initiation), as well as during damage progression.
Property module:
Material editor: Mechanical
ElasticityViscoelastic; Domain: Time