CINT, Action, Par1, Par2, Par3, Par4, Par5, Par6, Par7
Defines parameters associated with fracture parameter calculations

Compatible Products: – | – | – | Enterprise | Ent PP | Ent Solver | –

Command Specification for Action = NEW


Par1 --

CINT ID number.

Command Specifications for Action = CTNC

CINT, CTNC, Par1, Par2, Par3

Par1 --

Crack-tip node component name.

Par2 --

Crack-extension direction calculation-assist node. Any node on the open side of the crack.

Par3 --

Crack front’s end-node crack-extension direction override flag:

0 --

Align the extension direction with the edges attached at the two end nodes of the crack front (default).

1 --

Align the extension direction to be perpendicular to the crack front.

Command Specifications for Action = CENC

CINT, CENC, Par1, Par2, Par3, Par4, Par5, Par6, Par7

Par1 --

Crack extension node component name (CM).

Par2 --

Crack-tip node. The crack-tip node defaults to the first node of the crack extension node component.

Par3, Par4 --

Coordinate system number (Par3) and the number of the axis that is coincident with the crack direction (Par4). When these parameters are defined, Par5, Par6 and Par7 are ignored.

Par5, Par6, Par7 --

Global x, y, and z components of the crack extension direction vector. (Par3 and Par4 must be blank.)

Command Specifications for Action = TYPE


Par1 --

Type of calculation to perform:


Calculate J-integral (default).


Calculate material forces.


Calculate stress-intensity factors.


Calculate T-stress.


Calculate energy-release rate using the VCCT method.


Calculate C*-integral.


Calculate circumferential stress at the location where when sweeping around the crack tip at the given radius. Valid in an XFEM-based crack-growth analysis only.


Calculate maximum circumferential stress when sweeping around the crack tip at the given radius. Valid in an XFEM-based crack-growth analysis only.

Command Specifications for Action = DELE


Par1 --

CINT ID (default = ALL).

Command Specifications for Action = NCON


Par1 --

Number of contours to be calculated.

Command Specifications for Action = SYMM


Par1 --
OFF, 0, or NO --

No symmetry (default).

ON, 1, or YES --

Symmetric about the crack line/plane.

Command Specifications for Action = UMM


Par1 --
OFF, 0, or NO --

Deactivate Unstructured Mesh Method (UMM).

ON, 1, or YES --

Activate .

Command Specifications for Action = NORM

CINT, NORM, Par1, Par2

Par1 --

Coordinate system number (default = 0, global Cartesian).

Par2 --

Axis of coordinate system (default = 2, global Cartesian Y-axis).

Command Specifications for Action = EDIR

CINT, EDIR, ITYPE, Par1, Par2, Par3, Par4


Input type for the crack-assist extension direction. Valid values are CS (coordinate system number) or COMP (component x or y extension direction).

Par1 --

If ITYPE = CS, the coordinate system number.

If ITYPE = COMP, the x component of the crack-assist extension direction.

Par2 --

If ITYPE is CS, the axis representing the crack-assist extension direction.

If ITYPE = COMP, the y component of the crack-assist extension direction.

Par3 --

For ITYPE = CS, this value is not specified.

For ITYPE = COMP, the z component of the crack-assist extension direction.

Par4 --

A reference node on the crack front attached to the crack-assist extension direction. To accurately calculate and flip the crack extension directions, the crack-assist extension direction defined at this node is rotated as the tangent along the crack front rotates. This capability is useful when the crack-extension directions vary by more than 180 degrees along the crack front.

Command Specifications for Action = PLOT

CINT, PLOT, Par1, Par2

Par1 --

Crack ID.

Par2 --

0 -- Disable plotting of crack-tip coordinate system.

1 -- Enable plotting of crack-tip coordinate system (default).

Color codes are white for crack-extension direction, green for crack normal, and red for the direction tangential to the crack front. To clear or delete the plots, issue the /ANNOT command.

Command Specifications for Action = CXFE


Par1 --

Crack-tip element number or crack-front component name.

Command Specifications for Action = RADIUS


Par1 --

Radius at which a value is evaluated (used with CINT,TYPE,PSMAX or CINT,TYPE,STTMAX only).

Command Specifications for Action = RSWEEP

CINT, RSWEEP, Par1, Par2, Par3

Par1 --

Number of intervals for the sweep.

Par2 --

Minimum angle of the sweep.

Par3 --

Maximum angle of the sweep


Initiate a new calculation via the Action = NEW parameter. Subsequent CINT commands (with parameters other than NEW) define the input required for the fracture parameter calculations.

The simplest method is to define crack information using Action = CTNC; however, this method limits you to only one node for a given location along the crack front. Use the CTNC option only when all nodes that define the crack front lie in a single plane.

To define crack information at multiple locations along the crack front, use Action = CENC. You can issue CINT,CENC, Par1, etc. multiple times to define the crack-extension node component, the crack tip, and the crack-extension directions at multiple locations along the crack front.

Although you can vary the sequence of your definitions, all specified crack-tip nodes must be at the crack front, and no crack-tip node can be omitted.

You can define the crack extension direction directly by specifying either Action = CENC or Action = NORM.

The crack-assist extension direction (Action = EDIR) provides a generic extension direction when Action = CTNC is specified. It is used to help define crack extension directions based on the connectivity of the crack-front elements. For a 2-D case, when the crack tangent cannot be calculated, the crack-assist extension direction provided is used directly.

For Action = UMM, the default value can be OFF or ON depending on the element type. The CINT command overrides the default setting for the given element.

For an XFEM-based crack-growth analysis:

  • Action = CTNC, CENC, NCON, SYMM, UMM, or EDIR have no effect.

  • Action = CXFE, RADIUS, or RSWEEP are XFEM-specific and invalid for any other type of crack-growth analysis.

  • For CINT,TYPE, only Par1 = PSMAX or STTMAX are valid. Other Par1 values have no effect.

The stress-intensity factors calculation (CINT,TYPE,SIFS) applies only to isotropic linear elasticity. Use only one material type for the crack-tip elements that are used for the calculations.

When calculating energy release rates (CINT,TYPE,VCCT), do not restrict the results from being written to the database (/CONFIG,NOELDB,1) after solution processing; otherwise, incorrect and potentially random results are possible.

The CINT command supports only strain data for initial state (INISTATE,SET,DTYP,EPEL). Other initial state capabilities are not supported.

For more information about using the CINT command, including supported element types and material behavior, see Evaluation of Fracture Mechanics Parameters in the Mechanical APDL Fracture Analysis Guide.

Menu Paths

This command cannot be accessed from a menu.

Release 18.2 - © ANSYS, Inc. All rights reserved.