CEETRON Access from Tech Soft 3D is a toolkit designed to provide a comprehensive mechanism for accessing data from the model and solution results data files of many important commercial finite element analysis (FEA) software systems used in the fields of mechanical computer aided engineering (MCAE) and computational fluid dynamics (CFD).

A data model consisting of the notion of a library - dataset - attribute hierarchy is mapped onto the data structure of all model and solution results data files (libraries). The net result being that CEETRON Access allows a consistent interface to finite element data from many sources. CEETRON Access also provides a “native” library which supports both read and write operations. All library formats, whether native or “external” may be accessed through CEETRON Access in an identical manner. The basic features of CEETRON Access are summarized below.

  • Direct access to the following input model and output results files

    ABAQUS input file
    ABAQUS .fil and .odb data file
    AFLR (Mississippi State) grid file
    ANSYS input (CDWRITE) file
    ANSYS .rst, .rth and .rfl results files
    AUTODYN results files
    Altair Engineering HyperMesh ASCII file and H3D file
    CEI/EnSight Casefile format
    CFX result file
    CGNS data base
    COMSOL sectionwise and mph file
    Core Technologies CT Core interface
    FEMAP neutral file
    FIDAP neutral file
    FLUENT Case and data file
    GMV file
    LSTC LS-DYNA input file
    LSTC State and time history databases
    MSC/Adams files
    MSC/MARC results files
    MSC/NASTRAN bulk data input file
    MSC/NASTRAN OUTPUT2, XDB, HDF5 output file
    MSC/Patran neutral files
    NASA/PLOT3D grid, solution and function files
    OBJ tesselation files
    OpenFOAM databases
    PERMAS result file
    POLYFLOW mesh and solution files
    PTC/Mechanica design study and FEM Neutral Format
    IDEAS universal file
    Siemens SAMCEF des files
    STAR-CCM results file
    Tecplot file format
    3D Systems/STL ASCII text and binary files
    Vtk legacy file format
  • Model data consists of node, element and coordinate system information. Element data includes connectivity and type, material and property ids and user element id. Node data includes coordinates and user node id.

  • Supported finite elements include lines, triangles, quadrilaterals, tetrahedra, pyramids, pentahedra or hexahedra which may be represented by linear, parabolic or cubic shape functions. P-elements are supported as arbitrarily sized cell arrays. Polygons and polyhedra are also supported.

  • Auxiliary model information such as load and constraint cases, element material and physical properties are available if resident on the external library.

  • Results data may be maintained at node points, element centroids or element nodes. Scalar, vector and symmetric tensor (stress) data is supported.

  • All libraries are treated as direct access even if written as sequential binary files (eg using Fortran sequential I/O). Data is accessed and coerced to memory resident data structures only upon request. This eliminates the need for global translation and data duplication and maximizes I/O operations.

  • Object oriented architecture, written in C.

  • Hardware independent