Surface Variables

Contact pressure (CPRESS) and frictional shear stresses (CSHEAR). Output is also available on the main surface to the .odb file in a single main-secondary setting.

Contact pressure (CPRESSETOS) and frictional shear stresses (CSHEARETOS) due to edge-to-surface contact constraints. Output is also available on the main surface to the .odb file in a single main-secondary setting.

Error indicators for the contact pressure (CPRESSERI) and frictional shear stresses (CSHEARERI). Output is also available on the main surface to the .odb file in a single main-secondary setting.

Viscous pressure (CDPRESS) and viscous shear stresses (CDSHEAR). Output is also available on the main surface to the .odb file in a single main-secondary setting.

Contact opening (COPEN) and relative tangential motions (CSLIP).

Contact equivalent relative tangential motion.

Normalized contact equivalent relative tangential motion for the small-sliding tracking approach in general contact.

Contact plastic relative tangential motions (CSLIP_PL1 and CSLIP_PL2).

Contact equivalent plastic relative tangential motion.

Contact opening (COPENETOS) and relative tangential motions (CSLIPETOS) for edge-to-surface contact constraints.

Contact normal force (CNORMF) and frictional shear force (CSHEARF). Output is also available on the main surface to the .odb file in a single main-secondary setting.

Contact load due to line contact from edge-to-surface and radial edge-to-edge constraints in units of force per length. The normal (CLINELOADN) and frictional shear (CLINELOADT) components are available only for general contact to the .odb file.

Contact nodal area for each node in contact or near an opposing surface, calculated as $A_i={\mathrm{\Sigma }}_{j=1}^{n_{cont\_i}}\left|c_{ij}\right|A_j,$ where $n_{cont\_i}$ is the number of potential contact constraints involving node $i$ , $A_j$ is the area of constraint $j$ , and $c_{ij}$ is a contact constraint coefficient.

Contact load in units of force due to point contact from edge-to-edge constraints using the cross formulation. The normal (CPOINTLOADN) and frictional shear (CPOINTLOADT) components are available only for general contact to the .odb file.

Crack opening and relative tangential motions on cracked surfaces in enriched elements.

Remaining residual pressure and tangential shear stresses on cracked surfaces in enriched elements.

Contact status. Output is also available on the main surface to the .odb file in a single main-secondary setting.

Maximum value of the maximum stress-based damage initiation criterion for cohesive contact up to the current increment.

Maximum value of the quadratic stress-based damage initiation criterion for cohesive contact up to the current increment.

Maximum value of the maximum separation-based damage initiation criterion for cohesive contact up to the current increment.

Maximum value of the quadratic separation-based damage initiation criterion for cohesive contact up to the current increment.

Damage variable for cohesive surfaces or for cracked surfaces in enriched elements.

Instantaneous contact tangent directions (CTANDIR1 and CTANDIR2).

Pressure due to fluid pressure penetration loading.

Force due to fluid pressure penetration loading.

Solution-dependent state variables.

Total force due to contact pressure (CFNn, n = 1, 2, 3).

Magnitude of total force due to contact pressure.

Total force due to frictional stress (CFSn, n = 1, 2, 3).

Magnitude of total force due to frictional stress.

Total force due to contact pressure and frictional stress (CFTn, n = 1, 2, 3).

Magnitude of total force due to contact pressure and frictional stress.

The scalar integration of the contact pressure over the surface.

Total moment about the origin due to contact pressure (CMNn, n = 1, 2, 3).

Magnitude of total moment about origin due to contact pressure.

Total moment about the origin due to frictional stress (CMSn, n = 1, 2, 3).

Magnitude of total moment about the origin due to frictional stress.

Total moment about the origin due to contact pressure and frictional stress (CMTn, n = 1, 2, 3).

Magnitude of total moment about the origin due to contact pressure and frictional stress.

Total area in contact.

Maximum torque that can be transmitted about the z-axis by a contact surface in an axisymmetric analysis with a friction coefficient of unity.

Center of the total force due to contact pressure (XNn, n = 1, 2, 3).

Center of the total force due to frictional stress (XSn, n = 1, 2, 3).

Total force due to fluid pressure penetration loading (PFNn, n = 1, 2, 3).

Magnitude of total force due to fluid pressure penetration loading.

Center of the total force due to contact pressure and frictional stress (XTn, n = 1, 2, 3).

Heat flux per unit area leaving the secondary surface.

HFL multiplied by the nodal area.

Time integrated HFL.

Time integrated HFLA.

Electrical current per unit area.

ECD multiplied by the nodal area.

Time integrated ECD.

Time integrated ECDA.

Heat flux per unit area leaving the secondary surface.

HFL multiplied by the nodal area.

Time integrated HFL.

Time integrated HFLA.

Heat flux per unit area due to electrical current.

SJD multiplied by the nodal area.

Time integrated SJD.

Time integrated SJDA.

Weighting factor for heat distribution between the interface surfaces.

Heat flux per unit area leaving the secondary surface.

HFL multiplied by the nodal area.

Time integrated HFL.

Time integrated HFLA.

Heat flux per unit area due to frictional dissipation.

SFDR multiplied by the nodal area.

Time integrated SFDR.

Time integrated SFDRA.

Weighting factor for heat distribution between the interface surfaces.

Electrical current per unit area.

ECD multiplied by the nodal area.

Time integrated ECD.

Time integrated ECDA.

Heat flux per unit area leaving the secondary surface.

HFL multiplied by the nodal area.

Time integrated HFL.

Time integrated HFLA.

Heat flux per unit area due to frictional dissipation.

SFDR multiplied by the nodal area.

Time integrated SFDR.

Time integrated SFDRA.

Heat flux per unit area due to electrical current.

SJD multiplied by the nodal area.

Time integrated SJD.

Time integrated SJDA.

Weighting factor for heat distribution between the interface surfaces.

Electrical current in electrolyte per unit area.

ECDE multiplied by the nodal area.

Time integrated ECDE.

Time integrated ECDEA.

Heat flux per unit area due to electrical current in electrolyte.

SJDE multiplied by the nodal area.

Time integrated SJDE.

Time integrated SJDEA.

Ionic flux per unit area leaving the secondary surface.

MFLE multiplied by the nodal area.

Time integrated MFLE.

Time integrated MFLEA.

Species flux per unit area leaving the secondary surface.

MFLS multiplied by the nodal area.

Time integrated MFLS.

Time integrated MFLSA.

Pore fluid volume flux per unit area leaving the secondary surface.

PFL multiplied by the nodal area.

Time integrated PFL.

Time integrated PFLA.

Fluid volume rate within the cracked surfaces in the enriched element.

Pore pressure within the cracked surfaces in the enriched element.

Pore pressure on the cracked surfaces in the enriched element.

Leak-off flow rate on the cracked surfaces in the enriched element.

Accumulated leak-off flow volume on the cracked surfaces in the enriched element.

Total pore fluid volume flux leaving the secondary surface.

Time integrated TPFL.

When multiple fluids are defined, the components of FLVF represent the volume fraction of each fluid type. In particular, FLVF_i refers to the volume fraction of fluid type i.

Volumetric concentration of proppant particles in the slurry within the cracked surfaces in the enriched element.

Concentration of proppant particles in the slurry per unit area within the cracked surfaces in the enriched element.

Filter cake thickness on the top and bottom crack surfaces in the enriched element.

Temperature within the cracked surfaces in the enriched element.

Heat generation surface flux of Butler-Volmer electric current, $Q_1$ .

Entropic heat generation surface flux, $Q_2$ .

Sum of heat generation surface fluxes, $Q_1$ and $Q_2$ above.

Time when bond failure occurs.

All components of remaining stress in the failed bond.

Fraction of stress that remains at bond failure.

Bond state (varies from 1.0 to 0.0).

Damage variable.

Relative displacement behind crack when fracture criterion is met.

All components of critical stress at failure.

All components of strain energy release rate.

Effective energy release rate ratio.

Number of cycles to debond.

Accumulated crack length at each secondary surface node, measured starting from the unbonded nodes immediately behind the initial crack front.