15.1 Changes in Abaqus options

This section summarizes the changes and the additions that have been made to the options that define an Abaqus model.

mod(S)  *ACOUSTIC FLOW VELOCITY

This option can now be used only in linear perturbation analyses.

mod(E)  *CAST IRON COMPRESSION HARDENING

This option can now be used in Abaqus/Explicit to define the compression hardening data for the gray cast iron plasticity model.

mod(E)  *CAST IRON PLASTICITY

This option can now be used in Abaqus/Explicit to define the plastic properties for the gray cast iron plasticity model.

mod(E)  *CAST IRON TENSION HARDENING

This option can now be used in Abaqus/Explicit to define the tension hardening data for the gray cast iron plasticity model.

mod(E)  *CLAY HARDENING

This option can now be used in Abaqus/Explicit to define piecewise linear hardening/softening of the Cam-clay plasticity yield surface.

mod(E)  *CLAY PLASTICITY

This option can now be used in Abaqus/Explicit to specify the plastic part of the material behavior for elastic-plastic materials that use the Cam-clay plasticity model.

mod(E)  *CONTACT CLEARANCE

The SEARCH NSET parameter can now be used to identify initially bonded nodes in a crack propagation analysis using the VCCT criterion.

mod(E)  *CONTACT FORMULATION

Set TYPE=POLARITY to choose which sides of double-sided elements will be considered for node-to-face or Eulerian-Lagrangian contact with another surface.

mod(S)  *CONTOUR INTEGRAL

The new XFEM parameter allows you to indicate that the crack is modeled as an enriched feature with the extended finite element method.

new(E)  *CONWEP CHARGE PROPERTY

Define a CONWEP charge for incident waves.

mod(S)  *DAMPING CONTROLS

This option can now be used with the *MATRIX GENERATE and *SUBSTRUCTURE GENERATE options.

mod(S)  *DYNAMIC

Use the new APPLICATION parameter to choose a general time integration method based on the nature of the analysis you are performing. Several other parameters have been added or revised to allow fine control over the time-integration scheme for dynamic analyses.

new(E)  *EULERIAN MESH MOTION

Define the motion of an Eulerian mesh.

mod(S)  *EXPANSION

Use the new FIELD parameter to identify the predefined field variable that will be used to drive field expansion strains.

mod(S)  *FIELD

Use the new OUTPUT VARIABLE parameter in conjunction with the FILE parameter to define predefined fields using nodal temperatures (NT), normalized concentrations (NNC), and electric potentials (EPOT) read from previously generated output databases.

mod(E)  *FRACTURE CRITERION

This option can now be used in Abaqus/Explicit to define brittle fracture crack propagation using a VCCT criterion in the context of general contact surface-based cohesive behavior.

mod(S)  *GLOBAL DAMPING

This option can now be used with the *MATRIX GENERATE and *SUBSTRUCTURE GENERATE options.

mod(E)  *INCIDENT WAVE INTERACTION

Use the new CONWEP parameter to indicate interaction with a blast wave from an explosion in air.

mod(E)  *INCIDENT WAVE INTERACTION PROPERTY

Set TYPE=AIR BLAST or TYPE=SURFACE BLAST to indicate interaction with a blast wave from an explosion in air.

mod(S)(E)  *INITIAL CONDITIONS

Use the new OUTPUT VARIABLE parameter in conjunction with the TYPE=FIELD and FILE parameters to initialize predefined fields using nodal temperatures (NT), normalized concentrations (NNC), and electric potentials (EPOT) read from previously generated output databases.

mod(S)  *MATRIX INPUT

Use the new TYPE parameter to define the shape (symmetric or unsymmetric) of the matrix.

mod(E)  *MOHR COULOMB

This option can now be used in Abaqus/Explicit to define the yield surface and flow potential parameters for elastic-plastic materials that use the Mohr-Coulomb plasticity model.

mod(E)  *MOHR COULOMB HARDENING

This option can now be used in Abaqus/Explicit to define piecewise linear hardening/softening behavior for a material defined by the Mohr-Coulomb plasticity model.

mod(E)  *NODAL ENERGY RATE

This option can now be used in Abaqus/Explicit to define the variable critical energy release rates for a crack propagation analysis using the VCCT criterion.

mod(S)  *SOLVER CONTROLS

You can no longer specify the number of domains used by the iterative linear equation solver.

mod(S)  *STEADY STATE DYNAMICS

Set INTERVAL=SPREAD to define frequency points spread around eigenfrequencies.

mod(S)  *STEP

Set SOLVER=ITERATIVE to use the iterative linear equation solver. The SOLVER=DDM setting is no longer available.