ModelChecker
is developed by:
Computer Aided Engineering Group, Inc.
398 Old Sherman Hill Road
Woodbury, CT 06798
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ModelChecker™ for ANSYS®5.7
through 11.0
Finite Element Analysis Model Examination and Documentation
Software
Technical Specifications
Checks model statistics. In addition
to standard information, the software provides:
- System date
- ANSYS® Revision #
- ANSYS® Update number
- Title
- Job name
- FE Model Units
- System type
- Solid model summary
- Keypoints, lines, areas, volume
- Solid model diagnostic information
- Number of solid parts
- Small/large
entity summary
- Small
angle summary
- Volume/mass
summary
- Analysis type
- Equation solver
- Detailed load and displacement BC summary
for solid model and FEA model
- Listing of element types used , # of elements
associated with each type
- List of material properties used with # of
associated elements
- Detailed description of inertia loads including component
inertia loads
- # of super elements
- # of contact elements
- # of pretension elements
- # of composite elements
- # of surface effect elements
- # of shell elements
- # of explicit elements
- # of 1-D elements
- # of lumped mass elements
- # of p-elements
- # of parts, solid model and FEA model
- # of mesh elements
- # of axisymmetric elements
- # of harmonic elements
- # of gasket elements
- # of MPC184 elements
- Model units w Model dimensionality (2-D, axisymmetric,
harmonic, 3-D)
- List of actual, active DOF in model (e.g.,
UX,UY,ROTZ), ANSYS listings are simply based on defined element
types
- Rotated nodal coordinate system flag
- Nonlinear model flag
- Sources of nonlinearity flagged such as plasticity
or viscoplasticity, creep, hyperelasticity, large deformation,
stress stiffening, nonlinear element types, contact element
types
- Conservative or non-conservative, (users manual
discusses implications)
- Current setting of nonlinear controls and
options
Number of FEM parts
(based on FEM topology), options to include or exclude coupling
and constraint equations and one-dimensional elements in determining
FEM parts
- Isolated elements (not connected to other elements)
- Unused (count of number and list of unused numbers)
- Element types, Material, Real set
- Needed but undefined (count of number and list of needed
numbers)
- element shape checks with concise summaries
- reversed (inconsistent) shell normals
Nodal checks
- Unused nodes
- DOF mismatch (elements with different DOF sharing common
node)
- Applied forces/displacements that will be ignored since
model does not have the corresponding DOF
Mesh compatibility
(cracks), including mid-side nodes shared with corner nodes
Temperature checks
- wide variety of node and element temperature checks, reference
value(s), temp-dependent properties, coefficient of thermal
expansion, etc. Portions of model where temperatures are undefined
and hence TUNIF will be used.
Coupling equations checks
(non-coincident nodes, non-parallel directions)
Constraint equation check
(simulate uniform temperature rise), look for equations that
inadvertently induce stress
Constraint and/or coupling
sets used in large deformation analysis
CPU-intensive options(require
element mass formulation)
- Net load summary
- Net load and moment in each direction. Overall model,
or part by part, broken down by:
- Applied nodal forces/moments
- Inertia loads
- Pressures
- FEM mass summary, over-all model or part by part.
Preliminary rigid-body
motion check (types and directions)
- Entire model or part by part
Element/load consistency checks
- Mixtures of axisymmetric and nonaxisymmetric elements
- Mixtures of harmonic and nonharmonic elements
- Use of harmonic elements in nonlinear analysis
- Axisymmetric elements subjected to inertia loads(spin,
G-loads) in inappropriate directions(e.g., spin about the
x-axis)
- Harmonic elements subjected to inertia loads in inappropriate
directions(e.g., spin about the y-axis for MODE >0)
Nonlinear summary
and consistency checks
Solid Model Checks
- Simple model statistics
- # of parts (based on solid model topology); volume parts,
area parts, line parts
- Small/large line, area, volume, small angle summary
- Area/volume/mass and center of mass location
- All of the above (default)
ModelChecker gives the user the option to include
multiple view plots of the solid model and/or the finite element
model with, or without, boundary conditions, in the HTML report.
If the model produces a warning in any check,
the number of entities producing such a warning is noted and
the entities are grouped into components for later review.
For companies that want to
provide their users with a customized report and additional
checking, the software provides the following options:
The information gathered by ModelChecker can
be stored in the ANSYS database.This allows companies to create
company-specific reports via the use of the data, which is
fully documented and easily accessible via the ANSYS APDL
language or a formatted external file.
The company or user can provide a file (or input
values) containing company- specific "reasonable" values of
the following:
- Young's Modulus
- Poisson's ratio
- Density
- Coefficient of thermal expansion
- Angular velocity
- Linear acceleration
- Temperature
The program can then check the database for
reasonable values and report quantities "out of range". This
will catch many errors associated with typos or incorrect
units.
Hardware platforms supported:
ModelChecker appears in the ANSYS graphical user interface
as a Main Menu selection and runs on all the ANSYS supported
hardware platforms.
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