User subroutine functions listing

Abaqus/Standard User Subroutines


Name	Function
CREEP	User subroutine to define time-dependent, viscoplastic behavior (creep and swelling).
DFLOW	User subroutine to define nonuniform pore fluid velocity in a consolidation analysis.
DFLUX	User subroutine to define nonuniform distributed flux in a heat transfer or mass diffusion analysis.
DISP	User subroutine to specify prescribed boundary conditions.
DLOAD	User subroutine to specify nonuniform distributed loads.
FILM	User subroutine to define nonuniform film coefficient and associated sink temperatures for heat transfer analysis.
FLOW	User subroutine to define nonuniform seepage coefficient and associated sink pore pressure for consolidation analysis.
FRIC	User subroutine to define frictional behavior for contact surfaces.
FRIC_COEF	User subroutine to define the frictional coefficient for contact surfaces.
GAPCON	User subroutine to define conductance between contact surfaces or nodes in a fully coupled temperature-displacement analysis, coupled thermal-electrical-structural analysis, or pure heat transfer analysis.
GAPELECTR	User subroutine to define electrical conductance between surfaces in a coupled thermal-electrical or a coupled thermal-electrical-structural analysis.
HARDINI	User subroutine to define initial equivalent plastic strain and initial backstress tensor.
HETVAL	User subroutine to provide internal heat generation in heat transfer analysis.
MPC	User subroutine to define multi-point constraints.
ORIENT	User subroutine to provide an orientation for defining local material directions or local directions for kinematic coupling constraints or local rigid body directions for inertia relief.
RSURFU	User subroutine to define a rigid surface.
SDVINI	User subroutine to define initial solution-dependent state variable fields.
SIGINI	User subroutine to define an initial stress field.
UAMP	User subroutine to specify amplitudes.
UANISOHYPER_INV	User subroutine to define anisotropic hyperelastic material behavior using the invariant formulation.
UANISOHYPER_STRAIN	User subroutine to define anisotropic hyperelastic material behavior based on Green strain.
UCOHESIVEOFFSET	User subroutine to define the cohesive offset for pore pressure cohesive elements.
UCORR	User subroutine to define cross-correlation properties for random response loading.
UCREEPNETWORK	User subroutine to define time-dependent behavior (creep) for models defined within the parallel rheological framework.
UCURE	User subroutine to define cure kinetics
UDAMAGEMF	User subroutine to define damage evolution at the macro-level for a composite modeled with mean-field homogenization.
UDECURRENT	User subroutine to define nonuniform volume current density in an eddy current or magnetostatic analysis.
UDEMPOTENTIAL	User subroutine to define nonuniform magnetic vector potential on a surface in an eddy current or magnetostatic analysis.
UDMGINI	User subroutine to define the damage initiation criterion.
UDSECURRENT	User subroutine to define nonuniform surface current density in an eddy current or magnetostatic analysis.
UEL	User subroutine to define an element.
UELEMDRESP	User subroutine to define an element design response and its derivatives.
UELMAT	User subroutine to define an element with access to materials.
UEPACTIVATIONFACET	User subroutine to specify the area fraction over which convective or radiative cooling is applied when using element activation.
UEPACTIVATIONSETUP	User subroutine to control interaction with the toolpath-mesh intersection module and to specify the list of elements that can be activated.
UEPACTIVATIONVOL	User subroutine to specify material volume fraction added during element activation.
UEXPAN	User subroutine to define incremental thermal strains.
UEXTERNALDB	User subroutine to manage user-defined external databases and calculate model-independent history information.
UFIELD	User subroutine to specify predefined field variables.
UFLUID	User subroutine to define fluid density and fluid compliance for hydrostatic fluid elements.
UFLUIDCONNECTORLOSS	User subroutine to define the loss coefficient for fluid flow in fluid pipe connector elements.
UFLUIDCONNECTORVALVE	User subroutine to define the valve opening to control flow in fluid pipe connector elements.
UFLUIDLEAKOFF	User subroutine to define the fluid leak-off coefficients for pore pressure cohesive elements.
UFLUIDPIPEFRICTION	User subroutine to define the frictional coefficient for fluid flow in fluid pipe elements.
UGENS	User subroutine to define the mechanical behavior of a shell section.
UHARD	User subroutine to define the yield surface size and hardening parameters for isotropic plasticity or combined hardening models.
UHYPEL	User subroutine to define a hypoelastic stress-strain relation.
UHYPER	User subroutine to define a hyperelastic material.
UHYPER_STRETCH	User subroutine to define a hyperelastic material in terms of principal stretches.
UINTER	User subroutine to define surface interaction behavior for contact surfaces.
UMASFL	User subroutine to specify prescribed mass flow rate conditions for a convection/diffusion heat transfer analysis.
UMAT	User subroutine to define a material's mechanical behavior.
UMATHT	User subroutine to define a material's thermal behavior.
UMDFLUX	User subroutine for specifying moving or stationary nonuniform heat flux in a heat transfer analysis.
UMDFLUXSETUP	User subroutine to communicate with the toolpath-mesh intersection module and to specify the list of elements that are subjected to the moving flux load.
UMESHMOTION	User subroutine to specify mesh motion constraints during adaptive meshing.
UMIXMODEFATIGUE	User subroutine to specify a user-defined mixed-mode form of the Paris law in a fatigue crack growth analysis.
UMOTION	User subroutine to specify motions during cavity radiation heat transfer analysis or steady-state transport analysis.
UMULLINS	User subroutine to define damage variable for the Mullins effect material model.
UPOREP	User subroutine to define initial fluid pore pressure.
UPRESS	User subroutine to specify prescribed equivalent pressure stress conditions.
UPSD	User subroutine to define the frequency dependence for random response loading.
URDFIL	User subroutine to read the results file.
USDFLD	User subroutine to redefine field variables at a material point.
USETTLING	User subroutine to define the settling velocity field in slurry transport analysis.
USUPERELASHARDMOD	User subroutine to modify the material constants of the superelasticity model as a function of the plastic strain.
UTEMP	User subroutine to specify prescribed temperatures.
UTRACLOAD	User subroutine to specify nonuniform traction loads.
UTRS	User subroutine to define a reduced time shift function for a viscoelastic material.
UTRSNETWORK	User subroutine to define a reduced time shift function for models defined within the parallel rheological framework.
UVARM	User subroutine to generate element output.
UWAVE	User subroutine to define wave kinematics for an analysis.
UXFEMCRACK	User subroutine to define the interactions between the cracked element surfaces for enriched elements using a small sliding formulation.
UXFEMNONLOCALWEIGHT	User subroutine to define the weight function used to compute the average stress/strain to determine the crack propagation direction.
VOIDRI	User subroutine to define initial void ratios.

Abaqus/Explicit User Subroutines


Name	Function
VDFLUX	User subroutine to specify nonuniform distributed fluxes in an explicit dynamic coupled temperature-displacement analysis.
VDISP	User subroutine to specify prescribed boundary conditions.
VDLOAD	User subroutine to specify nonuniform distributed loads.
VEXTERNALDB	User subroutine that gives control to the user at key moments of the analysis so that data can be exchanged dynamically among user subroutines and with external programs or files.
VFABRIC	User subroutine to define fabric material behavior.
VFILM	User subroutine to define nonuniform film coefficients and sink temperatures for heat transfer analysis.
VFRIC	User subroutine to define frictional behavior for contact surfaces.
VFRIC_COEF	User subroutine to define the frictional coefficient for contact surfaces.
VFRICTION	User subroutine to define frictional behavior for contact surfaces.
VHETVAL	User subroutine to provide internal heat generation in a heat transfer analysis.
VSDVINI	User subroutine to define initial solution-dependent state variable fields.
VUAMP	User subroutine to specify amplitudes.
VUANISOHYPER_INV	User subroutine to define anisotropic hyperelastic material behavior using the invariant formulation.
VUANISOHYPER_STRAIN	User subroutine to define anisotropic hyperelastic material behavior based on Green strain.
VUCHARLENGTH	User subroutine to define characteristic element length at a material point.
VUCREEPNETWORK	User subroutine to define time-dependent behavior (creep) for models defined within the parallel rheological framework.
VUEL	User subroutine to define an element.
VUEOS	User subroutine to define equation of state material model.
VUEXPAN	User subroutine to define thermal strain increments.
VUFIELD	User subroutine to specify predefined field variables.
VUFLUIDEXCH	User subroutine to define the mass flow rate/heat energy flow rate for fluid exchange.
VUFLUIDEXCHEFFAREA	User subroutine to define the effective area for fluid exchange.
VUGENS	User subroutine to define the mechanical behavior of a shell section.
VUHARD	User subroutine to define the yield surface size and hardening parameters for isotropic plasticity or combined hardening models.
VUINTER	User subroutine to define the interaction between contact surfaces.
VUINTERACTION	User subroutine to define the contact interaction between surfaces with the general contact algorithm.
VUMAT	User subroutine to define a material's mechanical behavior.
VUMATHT	User subroutine to define a material's thermal behavior.
VUMULLINS	User subroutine to define damage variable for the Mullins effect material model.
VUSDFLD	User subroutine to redefine field variables at a material point.
VUSUPERELASHARDMOD	User subroutine to modify the material constants of the superelasticity model as a function of the plastic strain.
VUTEMP	User subroutine to prescribe temperatures at the nodes of a model.
VUTRS	User subroutine to define a reduced time shift function for a viscoelastic material.
VUVISCOSITY	User subroutine to define the shear viscosity for equation of state models.
VWAVE	User subroutine to define wave kinematics for an analysis.