Features

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

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

• 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 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
   

• 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

   

• 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
   

• 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
   

• 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
   

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