Surface Variables

You can request surface variable output to the data, results, or output database file. The letter “M” at the end of an output variable identifier designates the magnitude of the variable. Those variables that are output on both main and secondary surfaces in a single main-secondary contact pair are designated below. For exceptions to output on the main surface, see About Contact Pairs in Abaqus/Standard.

The following topics are discussed:

This page discusses:

Mechanical Analysis–Nodal Quantities
Mechanical Analysis–Whole Surface Quantities
Heat Transfer Analysis
Coupled Thermal-Electrical Analysis
Fully Coupled Temperature-Displacement Analysis
Fully Coupled Thermal-Electrical-Structural Analysis
Coupled Pore Fluid-Mechanical Analysis–Nodal Quantities
Coupled Pore Fluid-Mechanical Analysis–Nodal Quantities in Enriched Elements
Coupled Pore Fluid-Mechanical Analysis–Whole Surface Quantities
Coupled Pore Fluid-Temperature-Mechanical Analysis–Nodal Quantities in Enriched Elements
Bond Failure Quantities

The output variables listed below are available in Abaqus/Standard.

Mechanical Analysis–Nodal Quantities

CSTRESS: .dat: yes .fil: yes .odb Field: yes .odb History: yes
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.
CSTRESSETOS: .dat: no .fil: no .odb Field: yes .odb History: no
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.
CSTRESSERI: .dat: no .fil: no .odb Field: yes .odb History: no
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.
CDSTRESS: .dat: yes .fil: yes .odb Field: yes .odb History: yes
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.
CDISP: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Contact opening (COPEN) and relative tangential motions (CSLIP).
CSLIPEQ: .dat: no .fil: no .odb Field: yes .odb History: no
Contact equivalent relative tangential motion.
CSL_NORMALIZED: .dat: no .fil: no .odb Field: yes .odb History: no
Normalized contact equivalent relative tangential motion for the small-sliding tracking approach in general contact.
CSLIP_PL: .dat: no .fil: no .odb Field: yes .odb History: no
Contact plastic relative tangential motions (CSLIP_PL1 and CSLIP_PL2).
CSLIP_PLEQ: .dat: no .fil: no .odb Field: yes .odb History: no
Contact equivalent plastic relative tangential motion.
CDISPETOS: .dat: no .fil: no .odb Field: yes .odb History: no
Contact opening (COPENETOS) and relative tangential motions (CSLIPETOS) for edge-to-surface contact constraints.
CFORCE: .dat: no .fil: no .odb Field: yes .odb History: no
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.
CLINELOAD: .dat: no .fil: no .odb Field: yes .odb History: no
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.
CNAREA: .dat: no .fil: no .odb Field: yes .odb History: no
Contact nodal area for each node in contact or near an opposing surface, calculated as $A_{i} = Σ_{j = 1}^{n_{c o n t_i}} | c_{i j} | A_{j},$ where $n_{c o n t_i}$ is the number of potential contact constraints involving node $i$ , $A_{j}$ is the area of constraint $j$ , and $c_{i j}$ is a contact constraint coefficient.
CPOINTLOAD: .dat: no .fil: no .odb Field: yes .odb History: no
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.
CRKDISP: .dat: no .fil: no .odb Field: yes .odb History: yes
Crack opening and relative tangential motions on cracked surfaces in enriched elements.
CRKSTRESS: .dat: no .fil: no .odb Field: yes .odb History: yes
Remaining residual pressure and tangential shear stresses on cracked surfaces in enriched elements.
CSTATUS: .dat: no .fil: no .odb Field: yes .odb History: no
Contact status. Output is also available on the main surface to the .odb file in a single main-secondary setting.
CSMAXSCRT: .dat: no .fil: no .odb Field: yes .odb History: yes
Maximum value of the maximum stress-based damage initiation criterion for cohesive contact up to the current increment.
CSQUADSCRT: .dat: no .fil: no .odb Field: yes .odb History: yes
Maximum value of the quadratic stress-based damage initiation criterion for cohesive contact up to the current increment.
CSMAXUCRT: .dat: no .fil: no .odb Field: yes .odb History: yes
Maximum value of the maximum separation-based damage initiation criterion for cohesive contact up to the current increment.
CSQUADUCRT: .dat: no .fil: no .odb Field: yes .odb History: yes
Maximum value of the quadratic separation-based damage initiation criterion for cohesive contact up to the current increment.
CSDMG: .dat: no .fil: no .odb Field: yes .odb History: yes
Damage variable for cohesive surfaces or for cracked surfaces in enriched elements.
CTANDIR: .dat: no .fil: no .odb Field: yes .odb History: no
Instantaneous contact tangent directions (CTANDIR1 and CTANDIR2).
PPRESS: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Fluid pressure for pressure penetration analysis.
SDV: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Solution-dependent state variables.

Mechanical Analysis–Whole Surface Quantities

CFN: .dat: yes .fil: yes .odb Field: no .odb History: yes
Total force due to contact pressure (CFNn, n = 1, 2, 3).
CFNM: .dat: no .fil: no .odb Field: no .odb History: yes
Magnitude of total force due to contact pressure.
CFS: .dat: yes .fil: yes .odb Field: no .odb History: yes
Total force due to frictional stress (CFSn, n = 1, 2, 3).
CFSM: .dat: no .fil: no .odb Field: no .odb History: yes
Magnitude of total force due to frictional stress.
CFT: .dat: yes .fil: yes .odb Field: no .odb History: yes
Total force due to contact pressure and frictional stress (CFTn, n = 1, 2, 3).
CFTM: .dat: no .fil: no .odb Field: no .odb History: yes
Magnitude of total force due to contact pressure and frictional stress.
CICPS: .dat: no .fil: no .odb Field: no .odb History: yes
The scalar integration of the contact pressure over the surface.
CMN: .dat: yes .fil: yes .odb Field: no .odb History: yes
Total moment about the origin due to contact pressure (CMNn, n = 1, 2, 3).
CMNM: .dat: no .fil: no .odb Field: no .odb History: yes
Magnitude of total moment about origin due to contact pressure.
CMS: .dat: yes .fil: yes .odb Field: no .odb History: yes
Total moment about the origin due to frictional stress (CMSn, n = 1, 2, 3).
CMSM: .dat: no .fil: no .odb Field: no .odb History: yes
Magnitude of total moment about the origin due to frictional stress.
CMT: .dat: yes .fil: yes .odb Field: no .odb History: yes
Total moment about the origin due to contact pressure and frictional stress (CMTn, n = 1, 2, 3).
CMTM: .dat: no .fil: no .odb Field: no .odb History: yes
Magnitude of total moment about the origin due to contact pressure and frictional stress.
CAREA: .dat: yes .fil: yes .odb Field: no .odb History: yes
Total area in contact.
CTRQ: .dat: yes .fil: yes .odb Field: no .odb History: yes
Maximum torque that can be transmitted about the z-axis by a contact surface in an axisymmetric analysis with a friction coefficient of unity.
XN: .dat: yes .fil: yes .odb Field: no .odb History: yes
Center of the total force due to contact pressure (XNn, n = 1, 2, 3).
XS: .dat: yes .fil: yes .odb Field: no .odb History: yes
Center of the total force due to frictional stress (XSn, n = 1, 2, 3).
XT: .dat: yes .fil: yes .odb Field: no .odb History: yes
Center of the total force due to contact pressure and frictional stress (XTn, n = 1, 2, 3).

Heat Transfer Analysis

HFL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Heat flux per unit area leaving the secondary surface.
HFLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
HFL multiplied by the nodal area.
HTL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated HFL.
HTLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated HFLA.

Coupled Thermal-Electrical Analysis

ECD: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Electrical current per unit area.
ECDA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
ECD multiplied by the nodal area.
ECDT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated ECD.
ECDTA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated ECDA.
HFL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Heat flux per unit area leaving the secondary surface.
HFLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
HFL multiplied by the nodal area.
HTL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated HFL.
HTLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated HFLA.
SJD: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Heat flux per unit area due to electrical current.
SJDA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
SJD multiplied by the nodal area.
SJDT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated SJD.
SJDTA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated SJDA.
WEIGHT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Weighting factor for heat distribution between the interface surfaces.

Fully Coupled Temperature-Displacement Analysis

HFL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Heat flux per unit area leaving the secondary surface.
HFLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
HFL multiplied by the nodal area.
HTL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated HFL.
HTLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated HFLA.
SFDR: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Heat flux per unit area due to frictional dissipation.
SFDRA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
SFDR multiplied by the nodal area.
SFDRT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated SFDR.
SFDRTA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated SFDRA.
WEIGHT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Weighting factor for heat distribution between the interface surfaces.

Fully Coupled Thermal-Electrical-Structural Analysis

ECD: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Electrical current per unit area.
ECDA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
ECD multiplied by the nodal area.
ECDT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated ECD.
ECDTA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated ECDA.
HFL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Heat flux per unit area leaving the secondary surface.
HFLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
HFL multiplied by the nodal area.
HTL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated HFL.
HTLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated HFLA.
SFDR: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Heat flux per unit area due to frictional dissipation.
SFDRA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
SFDR multiplied by the nodal area.
SFDRT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated SFDR.
SFDRTA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated SFDRA.
SJD: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Heat flux per unit area due to electrical current.
SJDA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
SJD multiplied by the nodal area.
SJDT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated SJD.
SJDTA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated SJDA.
WEIGHT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Weighting factor for heat distribution between the interface surfaces.

Coupled Pore Fluid-Mechanical Analysis–Nodal Quantities

PFL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Pore fluid volume flux per unit area leaving the secondary surface.
PFLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
PFL multiplied by the nodal area.
PTL: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated PFL.
PTLA: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time integrated PFLA.

Coupled Pore Fluid-Mechanical Analysis–Nodal Quantities in Enriched Elements

GFVR: .dat: no .fil: no .odb Field: yes .odb History: yes
Fluid volume rate within the cracked surfaces in the enriched element.
PORPRES: .dat: no .fil: no .odb Field: yes .odb History: yes
Pore pressure within the cracked surfaces in the enriched element.
PORPRESURF: .dat: no .fil: no .odb Field: yes .odb History: yes
Pore pressure on the cracked surfaces in the enriched element.
LEAKVR: .dat: no .fil: no .odb Field: yes .odb History: yes
Leak-off flow rate on the cracked surfaces in the enriched element.
ALEAKVR: .dat: no .fil: no .odb Field: yes .odb History: yes
Accumulated leak-off flow volume on the cracked surfaces in the enriched element.

Coupled Pore Fluid-Mechanical Analysis–Whole Surface Quantities

TPFL: .dat: yes .fil: yes .odb Field: no .odb History: no
Total pore fluid volume flux leaving the secondary surface.
TPTL: .dat: yes .fil: yes .odb Field: no .odb History: no
Time integrated TPFL.

Coupled Pore Fluid-Temperature-Mechanical Analysis–Nodal Quantities in Enriched Elements

PORTEMP: .dat: no .fil: no .odb Field: yes .odb History: yes
Temperature within the cracked surfaces in the enriched element.

Bond Failure Quantities

DBT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Time when bond failure occurs.
DBS: .dat: yes .fil: yes .odb Field: yes .odb History: yes
All components of remaining stress in the failed bond.
DBSF: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Fraction of stress that remains at bond failure.
BDSTAT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Bond state (varies from 1.0 to 0.0).
CSDMG: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Damage variable.
OPENBC: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Relative displacement behind crack when fracture criterion is met.
CRSTS: .dat: yes .fil: yes .odb Field: yes .odb History: yes
All components of critical stress at failure.
ENRRT: .dat: yes .fil: yes .odb Field: yes .odb History: yes
All components of strain energy release rate.
EFENRRTR: .dat: yes .fil: yes .odb Field: yes .odb History: yes
Effective energy release rate ratio.
CYCLE: .dat: no .fil: no .odb Field: yes .odb History: yes
Number of cycles to debond.