.cntf file
An OptiStruct ASCII format results file.
File Creation
This file is created when the OPTI format is selected in the CONTF I/O Option Entry for Linear Static, Linear Inertia Relief, and Nonlinear Static Analysis.
File Contents
This file contains the following details. The output is controlled by the CONTF I/O Option.- Total contact force
- Total contact area
- Total normal force
- Total tangential force
- Contact utilization factor and shear magnitude. These are available only if the UTIL option is specified in the CONTF I/O Option.
- Contact moment. This is only available when the MNTREF continuation line is defined in the CONTACT Bulk Data Entry.
File Format
The .cntf file has the following format:
For each iteration, the following header is
used.
iter Iteration Numel
- Data
- Description
- iter
- Keyword identifying that the next field is the iteration number.
- Iteration
- Iteration number.
- Numel
- Total number of nonlinear quasi-static subcases (with contact) in the entire model.
Within the Iteration section, the following information is
provided for each
subcase.
SUBCASE: <Subcase ID> <Number of Contact Interfaces> LOAD: <Load ID> LABEL: <Label>
CONTACT INTERFACE: TOTAL FORCE ACTING ON MAIN SURFACE (BASIC SYSTEM) AND TOTAL CONTACT AREA
CONTACT# FORCE-X FORCE-Y MAGNITUDE AREA
- Data
- Description
- CONTACT#
- The Contact Interface identification number (CTID on the CONTACT Bulk Data Entry).
- FORCE-X
- The component of the total contact force along the X-axis of the Basic System.
- FORCE-Y
- The component of the total contact force along the Y-axis of the Basic System.
- FORCE-Z
- The component of the total contact force along the Z-axis of the Basic System.
- MAGNITUDE
- The magnitude of the total contact force acting on the Main Surface.
- AREA
- The total contact area.
CONTACT INTERFACE: TOTAL NORMAL AND TANGENTIAL FORCES ACTING ON MAIN SURFACE
CONTACT# NORMAL FORCE TANGENT FORCE
- Data
- Description
- NORMAL FORCE
- The total contact force along the normal direction of the contact.
- TANGENT FORCE
- The total contact force along the tangential direction of the contact.
Note: The following contact moment output is available only when the
MNTREF continuation line is defined in the
CONTACT Bulk Data
Entry.
CONTACT INTERFACE: MOMENT ACTING ON CONTACT SURFACE (BASIC SYSTEM)
CONTACT# MOMENT-X MOMENT-Y MOMENT-Z
- Data
- Description
- CONTACT#
- The Contact Interface identification number (CTID on the CONTACT Bulk Data Entry).
- MOMENT-X
- X-component of the moment, about the reference point in MNTREF definition, in the basic coordinate system.
- MOMENT-Y
- Y-component of the moment, about the reference point in MNTREF definition, in the basic coordinate system.
- MOMENT-Z
- Z-component of the moment, about the reference point in MNTREF definition, in the basic coordinate system.