'elty' <set> 'be2'|'be2f'|'be2d'|'be3'|'be3f'|-> 'tr3'|'tr3u'|'tr3e'|'tr3s'|'tr3c'-> 'tr6'|'tr6u'|'tr6e'|'tr6s'|'tr6c'|-> 'qu4'|'qu4e'|'qu4s'|'qu4c'|-> 'qu4r'|'qu4er'|'qu4sr'|'qu4cr'|-> 'qu8'|'qu8e'|'qu8s'|'qu8c'|-> 'qu8r'|'qu8er'|'qu8sr'|'qu8cr'|-> 'he8'|'he8f'|'he8i'|'he8r'|-> 'he20'|'he20r'|'pe6'|'pe6f'|'pe15'|-> 'pe15r'|'te4'|'te4f'|'te10' [<parameter>]This keyword is used to assign a specific element type to a set of entities (see section Element Types in the appendix). It can be used to specify the element type before the mesh is created or afterwards to change element attributes (from tr6u to tr6c or he8 to he8f etc.). The element name is composed of the following parts: The leading two letters define the shape (be: beam, tr: triangle, qu: quadrangle, he: hexahedra, pe: penta), then the number of nodes and at last an attribute describing the mathematical formulation or other features (c: axisymmetric, e: plain strain, s: plain stress, u: unstructured mesh, r: reduced integration, i: incompatible modes, f: fluid element for ccx). If the element type is omitted, the assignment is deleted. If all parameters are omitted, the actual assignments are posted:
>
1: coarser than the average boundary spacing, <
1: denser ). Be aware that specialized unstructured meshes must be created by using two times the elty command. First time the general unstructured type before the mesh is actually created and afterwards a redefinition into the more specific type:
The penta element types are not supported for meshing but can be used to redefine the attributes (pe6 to pe6f). Penta elements are only created if a mesh of triangles (2D) is sweeped in 3D. This procedure is used to create quasi 2D cfd meshes.
The fluid network element types are be2f and be3f. The be2f has to be used at the begin and the end of a network. This elements will use the special node nr '0' at the entry and exit. This node-nr is automatically assigned to the element definition when written in the ccx format. All other elements in the network must use the be3f type. The detailed element type definition has to be done in the ccx input file based on element-sets.