*elementchecksettings

Specifies the methods for calculating element quality checks which are generally those used by an FE solver.

Syntax

*elementchecksettings solver jacobian_2d jacobian_3d min_len_2d min_len_3d aspect_2d aspect_3d skew_2d skew_3d angle warpage taper chord_dev tetra_collapse cell_squish_2d equi_skew_2d cell_squish_3d equi_skew_3d time_step reserved_1 reserved_2 reserved_3 reserved_4

Type

HyperMesh Tcl Modify Command

Description

This command specifies the methods for calculating element quality checks which are generally those used by an FE solver.

If an invalid method index is specified for any check, the HyperMesh check is utilized.

Inputs

solver

Solver method to use for all checks. If a value of -1 is given, a distinct method can be supplied for some individual checks (see each option below to determine relevance). Valid values for the method/solver are:

0 - HyperMesh
1 - Abaqus
2 - I-deas
4 - Moldflow
5 - Nastran
6 - OptiStruct
8 - Radioss
9 - ANSYS
10 - Medina
12 - HyperMesh-Alt

jacobian_2d

Flag indicating the type of Jacobian calculation to use for 2D elements. Valid values are:

0 - Calculate at integration points (default HyperMesh value).
1 - Calculate at corners.
2 - At corner and mid points.
3 - At high order integration points.

jacobian_3d

Flag indicating the type of Jacobian calculation to use for 3D elements. Valid values are:

0 - Calculate at integration points.
1 - Calculate at corners.
2 - At corner and mid points.
3 - At high order integration points.

min_len_2d

Flag for minimum 2D element edge calculations. Valid values are:

0 - Calculate using the shortest edge.
1 - Calculate using the minimum normalized height (default HyperMesh value).
2 - Calculate using the minimum height.
10 - Calculate using Radioss default formulation.
20 - Calculate using LS-DYNA ISDO=0.
21 - Calculate using LS-DYNA ISDO=1.
22 - Calculate using LS-DYNA ISDO=2.
30 - Calculate using PAM-CRASH LARGE active.
31 - Calculate using PAM-CRASH SMALL active.

Methods 1 and 2 differ only for tria elements. Method 1 finds minimum tria length as its minimum height multiplied by the factor sqrt(3)/2. For equilateral triangles, this method returns exactly the triangle side length. Method 2 finds the minimum tria length as its minimum height.

min_len_3d

Flag for minimum 3D element edge calculations. Valid values are:

0 - Calculate using the shortest edge
1 - Calculate using the minimum height (tetra) (default HyperMesh value)
10 - Calculate using Radioss default formulation
20 - Calculate using LS-DYNA ISDO=0
21 - Calculate using LS-DYNA ISDO=1
22 - Calculate using LS-DYNA ISDO=2
30 - Calculate using PAM-CRASH LARGE active
31 - Calculate using PAM-CRASH SMALL active

aspect_2d

Method used to calculate the aspect ratio of 2D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh
1 - Abaqus
2 - Ideas
4 - Moldflow
5 - Nastran
6 - OptiStruct
8 - Patran
9 - ANSYS
10 - Medina
12 - HyperMesh-Alt

aspect_3d

Method used to calculate the aspect ratio of 3D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh
1 - Abaqus
2 - Ideas
4 - Moldflow
5 - Nastran
8 - Patran
9 - ANSYS

skew_2d

Method used to calculate the skew of 2D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh
1 - Abaqus
2 - Ideas
5 - Nastran
6 - OptiStruct
8 - Patran
9 - ANSYS
10 - Medina
12 - HyperMesh-Alt

skew_3d

Method used to calculate the skew of 3D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh
1 - Abaqus

angle

Method used to calculate the interior angle of 2D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh
1 - Abaqus
5 - Nastran
6 - OptiStruct
8 - Patran
9 - ANSYS
10 - Medina

warpage

Method used to calculate the warpage of 2D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh
1 - Abaqus
2 - Ideas
5 - Nastran
6 - OptiStruct
8 - Patran
9 - ANSYS
10 - Medina
12 - HyperMesh-Alt

taper

Method used to calculate the taper of 2D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh
2 - Ideas
5 - Nastran
6 - OptiStruct
8 - Patran
10 - Medina
12 - HyperMesh-Alt

chord_dev

Method used to calculate chordal deviation of 2D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh

tetra_collapse

Method used to calculate tetra collapse of tetra elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh

cell_squish_2d

Method used to calculate cell squish of 2D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh

equi_skew_2d

Method used to calculate the equi skew of 2D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh

cell_squish_3d

Method used to calculate cell squish of 3D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh

equi_skew_3d

Method used to calculate the equi skew of 3D elements. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh

time_step

Method used to calculate time step. This value is used only if the solver parameter is set to -1. Valid methods are:

0 - HyperMesh

reserved_1

Reserved for future use. Should always be 0.

reserved_2

Reserved for future use. Should always be 0.

reserved_3

Reserved for future use. Should always be 0.

reserved_4

Reserved for future use. Should always be 0.

Example

Set to use the OptiStruct checks:

*elementchecksettings 6 0 0 1 1 6 0 6 0 6 6 6 0 0 0 0 0 0 0 0 0 0 0

Version History

2020 - Value 5 (Nastran) is now supported for aspect_2d.