1.2. Element type

Names and IDs

At present, DAMASK incorporates ten different types of element geometries. The table below lists the element types and their equivalent IDs in MSC.Marc and Abaqus. For a detailed information about the characteristics of each element refer to [1] or [2].

Element geometry ID Dim Element type 3D view
Element Geometry
1 1 6   2 triangle (plane strain)
2 2 125   2 triangle, second order isoparametric (plane strain)
3 2 11 CPE4 2 arbitrary quadrilateral (plane strain)
4 2 27 CPE8 2 eight-node distorted quadrilateral (plane strain)
5 3 134 C3D4 3 tetrahedron, linear
6 4 127   3 tetrahedron, quadratic
7 4 136 C3D6 3 pentahedral, linear
8 4 117 C3D8R 3 hexahedral, linear (reduced integration)
9 4 7, 57 C3D8, C3D20R 3 hexahedral, linear; hexahedral, quadratic (reduced integration)
10 4 21 C3D20 3 hexahedral, quadratic

Features

 Figure 1: element 9: three-dimensional arbitrarily distorted brick.

Any element being incorporated has the same geometrical main features. 1 shows these features for the element ID 9. The eight corners represent the nodes having the numbers from 1 to 8. Each of these main nodes have an integration point (not shown in the figure) attached to its site. These are where all the kinematic calculations take place. It is worth to mention that for MSC.Marc the numbers of the integration points (IP) take the same value of their attached nodes with the exception that IP numbers of 3 and 4 are switched with each other as well as numbers 7 and 8. A numbering of the six faces (in this example) is necessary for the calculations. This is being illustrated with red in the figure. An introduction of the so-called subnodes was also essential to fully define all IP volumes. In our example the number of the subnodes are 19 taking the numbers from 9 to 27. In general all other used elements have the same main features of nodes, subnodes, integration points, and faces. They differ in the geometry and the number of components per each feature.

Application

A local coordinate system is defined with 3 linearly independent directions. It is sorted in (+x), (+y) and (+z) directions related to (1-2), (1-4) and (1-5) directions, respectively.

References

[1]
MSC.Marc users manual, Volume B: Element Library, 2010
[2]
Dassault Systèmes.Abaqus analysis user's manual, Volume IV: Elements, Version 6.10., 2010

Topic attachments
I Attachment Action Size Date Who Comment
gif animated_001.gif manage 143 K 25 Mar 2013 - 14:08 MaheshBalasubramaniam animated gif of 2D triangle (plane strain) element (damask id: 1)
gif animated_002.gif manage 174 K 25 Mar 2013 - 14:10 MaheshBalasubramaniam animated gif of 2D triangle, second order isoparametric (plane strain) element (damask id: 2)
gif animated_003.gif manage 190 K 25 Mar 2013 - 14:34 MaheshBalasubramaniam animated gif 2D arbitrary quadrilateral (plane strain) element (damask id: 3)
gif animated_004.gif manage 230 K 25 Mar 2013 - 14:23 MaheshBalasubramaniam animated gif of 2D eight-node distorted quadrilateral (plane strain) element (damask id: 4)
gif animated_005.gif manage 263 K 25 Mar 2013 - 15:03 MaheshBalasubramaniam animated gif file of 3D tetrahedron, linear element (damask id: 5)
gif animated_006.gif manage 426 K 25 Mar 2013 - 15:09 MaheshBalasubramaniam animated gif file of 3D tetrahedron, quadratic element (damask id: 6)
gif animated_007.gif manage 556 K 25 Mar 2013 - 15:24 MaheshBalasubramaniam animated gif file of 3D pentahedral, linear element (damask id: 7)
gif animated_008.gif manage 386 K 25 Mar 2013 - 15:32 MaheshBalasubramaniam animated gif file of 3D hexahedral, linear (reduced integration) element (damask id: 8)
gif animated_009.gif manage 792 K 25 Mar 2013 - 15:37 MaheshBalasubramaniam animated gif of 3D hexadral, linear (reduced integration) element (damask id: 9)
gif animated_010_1.gif manage 1 MB 25 Mar 2013 - 15:49 MaheshBalasubramaniam animated gif of 3D hexadral, quadratic element (damask id: 10)
pdf damask_001.pdf manage 10 K 21 Mar 2013 - 17:15 MaheshBalasubramaniam sketch of 2D triangle (plane strain) element (damask id: 1)
pdf damask_002.pdf manage 11 K 21 Mar 2013 - 17:15 MaheshBalasubramaniam sketch of 2D triangle, second order isoparametric (plane strain) element (damask id: 2)
pdf damask_003.pdf manage 11 K 21 Mar 2013 - 17:16 MaheshBalasubramaniam sketch of 2D arbitrary quadrilateral (plane strain) element (damask id: 3)
pdf damask_004.pdf manage 12 K 21 Mar 2013 - 17:17 MaheshBalasubramaniam sketch of 2D eight-node distorted quadrilateral (plane strain) element (damask id: 4)
pdf damask_005.pdf manage 19 K 21 Mar 2013 - 17:18 MaheshBalasubramaniam sketch of 3D tetrahedron, linear element (damask id: 5)
pdf damask_006.pdf manage 22 K 21 Mar 2013 - 17:18 MaheshBalasubramaniam sketch of 3D tetrahedron, quadratic element (damask id: 6)
pdf damask_007.pdf manage 23 K 21 Mar 2013 - 17:20 MaheshBalasubramaniam of 3D pentahedral, linear element (damask id: 7)
pdf damask_008.pdf manage 21 K 21 Mar 2013 - 17:21 MaheshBalasubramaniam sketch of of 3D hexahedral, linear (reduced integration) element (damask id: 8)
pdf damask_009.pdf manage 24 K 21 Mar 2013 - 17:52 MaheshBalasubramaniam sketch of 3D hexadral, linear element (damask id: 9)
pdf mesh_element_1.pdf manage 324 K 31 Oct 2012 - 08:44 NaderZaafarani Representation of element 1
png mesh_element_1.png manage 130 K 31 Oct 2012 - 09:24 PhilipEisenlohr
pdf mesh_element_9.pdf manage 362 K 04 Dec 2015 - 23:40 PhilipEisenlohr Representation of element 9
png mesh_element_9.png manage 171 K 04 Dec 2015 - 23:41 PhilipEisenlohr Representation of element 9
gif still_001.gif manage 2 K 25 Mar 2013 - 17:21 MaheshBalasubramaniam still of 2D triangle (plane strain) element (damask id: 1)
gif still_002.gif manage 2 K 25 Mar 2013 - 17:04 MaheshBalasubramaniam still of 2D triangle, second order isoparametric (plane strain) element (damask id: 2)
gif still_003.gif manage 3 K 25 Mar 2013 - 17:26 MaheshBalasubramaniam still 2D arbitrary quadrilateral (plane strain) element (damask id: 3)
gif still_004.gif manage 4 K 25 Mar 2013 - 17:27 MaheshBalasubramaniam still of 2D eight-node distorted quadrilateral (plane strain) element (damask id: 4)
gif still_005.gif manage 4 K 25 Mar 2013 - 17:29 MaheshBalasubramaniam still of 3D tetrahedron, linear element (damask id: 5)
gif still_006.gif manage 7 K 25 Mar 2013 - 17:33 MaheshBalasubramaniam still of 3D tetrahedron, quadratic element (damask id: 6)
gif still_007.gif manage 8 K 25 Mar 2013 - 17:34 MaheshBalasubramaniam still of 3D pentahedral, linear element (damask id: 7)
gif still_008.gif manage 6 K 25 Mar 2013 - 17:36 MaheshBalasubramaniam still of 3D hexahedral, linear (reduced integration) element (damask id: 8)
gif still_009.gif manage 14 K 25 Mar 2013 - 17:37 MaheshBalasubramaniam still of 3D hexadral, linear (reduced integration) element (damask id: 9)
gif still_010.gif manage 20 K 25 Mar 2013 - 17:38 MaheshBalasubramaniam still of 3D hexadral, quadratic element (damask id: 10)
Topic revision: r35 - 04 Dec 2015, PhilipEisenlohr

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