Figure 15.2: Types of Solid Section Cell Mesh
Default 2 x 2 Mesh 4 x 4 GradedMesh
Capturesplasticity
throughthicknessand
theonsetofplasticity
attheboundary1 x 4 Mesh
for 2 -Dbehavior15.2.3. Meshing a Line Model with BEAM188 or BEAM189 Elements
Before you mesh a line with BEAM188 or BEAM189 elements, some of its attributes must be defined.
These attributes include:
- The material set attribute pointer to be associated with the generat ed beam elements.
- The beam element type to be used in meshing the line.
- The orientation of the cross section with respect to the beam element axis. For detailed information
about orientation nodes and beams, see Generating a Beam Mesh With Orientation Nodes in the
Modeling and Meshing Guide. - The cross section ID to be assigned to the generat ed beam elements.
Issue the LATT command to associate these attributes with the selected, unmeshed line:
Command(s):LATT,MAT, ,TYPE, ,KB,KE,SECNUM
GUI: Main Menu> Preprocessor> Meshing> Mesh Attributes> Picked LinesSee the LATT command
description for the meaning of MAT and TYPE.
The following arguments are described here in terms of their applicability to beams.
KB
Corresponds to any keypoint number in the model. All beam elements generat ed will have their
beam section oriented such that the beam z-axis will lie in the plane defined by two line end key-
points and this keypoint number.
KE
Corresponds to any keypoint number in the model (optional).This keypoint determines the beam
orientation at the end of the line as described above. If KE is given,KB determines the beam orient-
ation at the beginning of the line. This is useful for creating twisted beams.
SECNUM
Corresponds to the beam section defined by the SECTYPE command with the section ID number
as given by the SECNUM.
15.3. Creating Cross Sections
There are two main types of beam cross sections:
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationBeam Analysis and Cross Sections