Comprehensive Element Technology
The current generation of ANSYS element technologies used in explicit dynamics provides rich functionality with a consistent theoretical foundation coupled with the most advanced algorithms. ANSYS Explicit Dynamics solutions provide a variety of elements for use with line bodies, surfaces and solid elements. Element types include 8-node hex, 6-node penta or 4-node tet elements in 3-D as well as 4-node hex and 3-node tet in 2-D. The speed of calculations can be further improved with the use of 2-D axis symmetry, 2-D planer symmetry as well as 3-D quarter or half symmetry. These options can be easily set up in the ANSYS Workbench platform. Complex geometries are often difficult to mesh with all hex elements, which are generally desirable due to their accuracy and efficiency. Tet elements facilitate the meshing of complicated geometries, but have been avoided in the past for explicit solutions, because they tend to be too stiff and lock up. The recently implemented NBS tet eliminates problems with both volume and shear locking and enables easier problem setup without sacrificing accuracy.