Data Input

  • CADFIX import of all popular CAD formats
  • Comprehensive interfaces to a wide range of FE- and CFD-programs
  • Neutral and archive formats for all or part of the model geometry
  • Batch or command input for model generation or display
  • Software libraries for development of your own interfaces
General Graphics Features

The main graphical and display features are:

  • Dynamic rotation, pan and zoom of model
  • Wire frame and hidden line views
  • Light source shading for realistic model images
  • Screen can be divided in multi-screens
  • User configurable fonts
  • Composing multi-layered pictures
  • User customization of color maps
  • Color assignments to parts/materials etc.
  • Viewing of full or part of the model based on sets
  • Labeling of geometry, shapes, loads, constraints, physical properties, local axis system and surface normal
  • Option to display realistic beam section, offset and orientation as well as display of realistic thickness of shell models
Geometry Creation
  • FEA solver specific environments for DIANA, ABAQUS, ANSYS, NASTRAN etc.
  • Creation of points by keyboard, cursor input, or calculated at intersections of two lines or a number of shapes
  • Points may be defined in a local coordinate system
  • Lines may be straight, arcs, ellipses, splines, circles or Nurbs and could be:
    • Defined as the intersection between analytical shapes
    • Grouped together to form combined lines
    • Split or grouped using the cursor
    • Defined as a fillet between 2 existing lines
    • Defined parallel, perpendicular, between or at an angle to existing lines
  • Surfaces may be defined from points or lines for 3 or 4 sided mapped meshing or n-sided regions for automatic meshing. It could also be:
    • Defined as the intersection between analytical shapes
    • Generated automatically on closed 3 or 4 sided regions
    • Nurbs may be input via CAD interface
  • Bodies may be defined from 2 opposite surfaces. It could also be:
    • 4, 5, 6 sided or general bodies (with voids)
    • A general body may be bounded by any number of surfaces (with voids)
    • Prismatic bodies with holes (generated by extruding complicated regions)
  • Boolean operations on sets are available
  • Geometric entities can be copied, swept or moved
  • Transformations available: translation, rotation, scale and mirror
  • Sweeping automatically produces lines, surfaces and/or bodies
  • Upward/downward tabulation to find parts of a higher or lower order
  • Geometric entities may be defined using parameters
  • Tools for merging duplicate entities or unwanted geometry within user defined tolerance
  • Entities can be created, deleted, or renamed at any time
  • Distances and angles between points, nodes and lines may be measured
  • Local co-ordinate systems may be rectangular, cylindrical or spherical
     
Mesh Definition
  • Mesh is associative – a change of geometry allows immediate remeshing
  • Mesh is either mapped or automatic 2-D triangulation, or quadrilateral paved
  • 3-D mesh may be brick, wedge or free tetrahedral
  • The number of divisions on any line may be adjusted to control mesh density
  • Divisions may be adjusted automatically, or in terms of element lengths
  • Divisions may be biased towards one end of a line
  • Divisions may be factored up or down for individual lines, surfaces or bodies of for the model as a whole
  • Element types are assigned to geometric entities and are analysis specific
  • Meshing is performed automatically for all or part of the model
  • The position of individual nodes may be adjusted
  • The position of mid-size modes can be controlled
  • Additional nodes and elements may be defined manually
  • Renumbering of nodes
  • Areas of mesh may be locked once they are acceptable to the user
  • Mesh quality can be checked against user specific quality criteria
     
Property and Loading Definition
  • Local co-ordinate systems may be assigned to geometry for loads and constraints
  • Properties, loads & constraints are assigned to geometric entities or at a space within the mesh
  • Analysis specific material properties are supported
  • Option to define properties through external files
  • Loads may be user-supplied, pressure, point-force, prescribed displacement, gravity load, temperature, heat, hydrostatic, centrifugal load or FE package specific
  • Time/frequency/space dependent loading variations
  • Load-masks can be applied to restrict load on part of geometry
  • Setting of initial conditions
  • Physical properties may be thickness, beam, sectional data, beam orientation or beam offset or analysis package specific

     

Visualization and Display
  • The full mesh or a user-defined set of the model may be displayed
  • Option of edge representation for fast draw
  • Color modulated tool for qualifying element connectivity
  • Shrunken elements, edges and faces
  • Display of selected external faces
  • Multiple cross-sections through solid models may be displayed at once
  • Automatic rotation to cross-section normal
  • Hidden line and hidden surface algorithms
  • Optional removal of internal mesh lines to reduce picture congestion
  • Smooth color shading with multiple light sources and highlighting
  • 3D perspective to add realism
  • User defined zooming in addition to dynamic zooming
  • Comprehensive interactive set creation tools for either nodes of elements
  • Sets of the model may be customized based on element type, group, material specific layer through a shell, XYZ location of IJK location (for CFD grids) or result values
  • Mesh may be colored according to element number, element group, material, physical property, set or element type
  • Cursor interrogation of node, element, material and group identity
  • Labeling of nodes, elements, IJK values (for CFD grids), materials, element groups or types with full color control
  • ‘Cutaway’ cross-section views to look through the model
     
Result Presentation
  • User controlled color modulation
  • Principal stress vector plots
  • Min/Max values are highlighted for results exceeding thresholds
  • Numerical values
  • Tabulated values
  • Contour plotting
  • Animation of particles track
  • Graph plotting
  • Bending Moment and Shear Force Diagrams may be superimposed on the mesh as an x-y plot
  • Displaced shape plots
  • Animations
     
Filters on Result Presentation
  • Values above and/or below user-specified thresholds
  • Presentation restricted to selected elements
  • Sets of elements or nodes can be created
  • Results restricted to selected surfaces
  • Presentation for selected materials
  • Presentation for specific surface within the shell element
     
Result Calculations

In addition to displaying results passed from an analysis program FEMGV can be used to calculate further results.

  • Load case combinations
  • Scanning across load cases or surfaces to create maximum/minimum envelopes
  • Standard structural analysis:
    • Principal stresses, strains and shears
    • Von Mises stress, plastic Yield and pressure
    • Extrapolate from Gauss points to element-nodes
    • Nodal average
    • Nodal average difference
    • Percentage difference
    • Safety factors
  • User defined calculation using expressions:
    • Addition, subtraction, multiplication and division
    • Power, square root, resultant of a vector
    • Gradient of a scalar
    • Divergence of a vector
    • Curl of a vector
    • Cross and dot product of vectors
  • Transformation to local axes systems
  • Transformation from global to local cylindrical, conical, spherical or rectangular systems
  • Transformations from local to global systems
  • Values calculated relative to a datum node or value
  • Displacements relative to a line or surface