
CREEP: Define timedependent, viscoplastic behavior (creep and
swelling).

DFLOW: Define nonuniform pore fluid velocity in a consolidation
analysis.

DFLUX: Define nonuniform distributed flux in a heat transfer or
mass diffusion analysis.

DISP: Specify prescribed boundary conditions.

DLOAD: Specify nonuniform distributed loads.

FILM: Define nonuniform film coefficient and associated sink
temperatures for heat transfer analysis.

FLOW: Define nonuniform seepage coefficient and associated sink
pore pressure for consolidation analysis.

FRIC: Define frictional behavior for contact surfaces.

FRIC_COEF: Define frictional coefficient for contact surfaces.

GAPCON: Define conductance between contact surfaces or nodes in a
fully coupled temperaturedisplacement analysis, a fully coupled
thermalelectricalstructural analysis, or a pure heat transfer analysis.

GAPELECTR: Define electrical conductance between surfaces in a
coupled thermalelectric analysis or a fully coupled
thermalelectricalstructural analysis.

HARDINI: Define initial equivalent plastic strain and initial
backstress tensor.

HETVAL: Provide internal heat generation in heat transfer
analysis.

MPC: Define multipoint constraints.

ORIENT: Provide an orientation for defining local material
directions or local directions for kinematic coupling constraints or local
rigid body directions for inertia relief.

RSURFU: Define a rigid surface.

SDVINI: Define initial solutiondependent state variable fields.

SIGINI: Define an initial stress field.

UAMP: Specify amplitudes.

UANISOHYPER_INV: Define anisotropic hyperelastic material behavior using
the invariant formulation.

UANISOHYPER_STRAIN: Define anisotropic hyperelastic material behavior based
on Green strain.

UCORR: Define crosscorrelation properties for random response
loading.

UCREEPNETWORK: Define timedependent behavior (creep) for models defined
within the parallel rheological framework.

UDECURRENT: Define nonuniform volume current density in an eddy
current or magnetostatic analysis.

UDEMPOTENTIAL: Define nonuniform magnetic vector potential on a surface
in an eddy current or magnetostatic analysis.

UDMGINI: Define the damage initiation criterion.

UDSECURRENT: Define nonuniform surface current density in an eddy
current or magnetostatic analysis.

UEL: Define an element.

UELMAT: Define an element with access to
Abaqus
materials.

UEPACTIVATIONVOL: Specify material volume fraction added during element
activation.

UEXPAN: Define incremental thermal strains.

UEXTERNALDB: Manage userdefined external databases and calculate
modelindependent history information.

UFIELD: Specify predefined field variables.

UFLUID: Define fluid density and fluid compliance for hydrostatic
fluid elements.

UFLUIDCONNECTORLOSS: Define the connector loss for fluid pipe connector
elements.

UFLUIDCONNECTORVALVE: Define the valve opening to control flow in fluid pipe
connector elements.

UFLUIDLEAKOFF: Define the fluid leakoff coefficients for pore pressure
cohesive elements.

UFLUIDPIPEFRICTION: Define the friction coefficient for fluid pipe elements.

UGENS: Define the mechanical behavior of a shell section.

UHARD: Define the yield surface size and hardening parameters
for isotropic plasticity or combined hardening models.

UHYPEL: Define a hypoelastic stressstrain relation.

UHYPER: Define a hyperelastic material.

UINTER: Define surface interaction behavior for contact surfaces.

UMASFL: Specify prescribed mass flow rate conditions for a
convection/diffusion heat transfer analysis.

UMAT: Define a material's mechanical behavior.

UMATHT: Define a material's thermal behavior.

UMDFLUX: Specify moving or stationary nonuniform heat flux in a
heat transfer analysis.

UMESHMOTION: Specify mesh motion constraints during adaptive meshing.

UMOTION: Specify motions during cavity radiation heat transfer
analysis or steadystate transport analysis.

UMULLINS: Define damage variable for the Mullins effect material
model.

UPOREP: Define initial fluid pore pressure.

UPRESS: Specify prescribed equivalent pressure stress conditions.

UPSD: Define the frequency dependence for random response
loading.

URDFIL: Read the results file.

USDFLD: Redefine field variables at a material point.

USUPERELASHARDMOD: Modify the material constants of the superelasticity
model as a function of the plastic strain.

UTEMP: Specify prescribed temperatures.

UTRACLOAD: Specify nonuniform traction loads.

UTRS: Define a reduced time shift function for a viscoelastic
material.

UTRSNETWORK: Define a reduced time shift function for models defined
within the parallel rheological framework.

UVARM: Generate element output.

UWAVE: Define wave kinematics for an
Abaqus/Aqua
analysis.

UXFEMNONLOCALWEIGHT: Define the weight function used to compute the average
stress/strain to determine the crack propagation direction.

VOIDRI: Define initial void ratios.