Impact is a finite element program for simulation of dynamic events such as car crashes or other large deformation events. It is kept very simple to make it intuitive to use and easy to change and extend. The program includes a NURBS based pre-processor for modelling, a solver with editor, a post-processor, and a graph plotter for results viewing. Impact also interfaces with several other programs, such as Nastran and Gmsh.
Several new file parsers have been added to the preprocessor. The UNV format allows interfacing with the Salome mesh generator. The BDF and NASTRAN file formats are simpler, faster, and more robust than the previous implementation. The GMSH reader now works with the version 2 format and does not require any preparation of the mesh. Finally, a group feature has been added but is not complete.
URL: Impact Finite Element Program