ABAQUS Volume II: I–Z - Manual (Page 384)

*SECTION CONTROLS
NO. For elements other than cohesive elements, connector elements, and elements with plane stress
formulations the default value is 1.0 if the element is deleted from the mesh and 0.99 otherwise.
For cohesive elements, connector elements, and elements with plane stress formulations the default
value is always 1.0.
SECOND ORDER ACCURACY
Set SECOND ORDER ACCURACY=YES to use a second-order accurate formulation for
solid or shell elements suitable for problems undergoing a large number of revolutions (> 5) in
ABAQUS/Explicit. This is the only option available for ABAQUS/Standard.
Set SECOND ORDER ACCURACY=NO (default in ABAQUS/Explicit) to use the first-order
accurate solid or shell elements in ABAQUS/Explicit.
The SECOND ORDER ACCURACY parameter is not relevant for linear kinematics.
VISCOSITY
This parameter applies to cohesive elements, connector elements, and elements with plane stress
formulations (plane stress, shell, continuum shell, and membrane elements) in ABAQUS/Standard
analyses.
Set this parameter equal to the value of the viscosity coefficient used in the viscous
regularization scheme for cohesive elements or connector elements or equal to the value of the
damping coefficient used in connector failure modeling. When this parameter is used to specify
the viscosity coefficients for the damage model for fiber reinforced materials, the specified value is
applied to all the damage modes. The default value is 0.0.
WEIGHT FACTOR
This parameter applies only to ABAQUS/Explicit analyses.
Set this parameter equal to ( ) to scale the contributions from the constant
hourglass stiffness term and the hourglass damping term to the hourglass control formulation.
Setting
or corresponds to pure constant stiffness hourglass control and pure
damping hourglass control, respectively. The default is . This option is used only for solid
and membrane elements when the HOURGLASS parameter is set equal to COMBINED.
Data line to define the hourglass control and bulk viscosity:
First (and only) line:
1. Scaling factor, , for the hourglass stiffness, for use with displacement degrees of freedom.
If this value is left blank, ABAQUS will use the default value of 1.0. The suggested range for
the value of
is between 0.2 and 3.0.
2. Scaling factor, , for the hourglass stiffness, for use with rotational degrees of freedom in shell
elements. If this value is left blank, ABAQUS will use the default value of 1.0. The suggested
range for the value of
is between 0.2 and 3.0.
18.1–4
ABAQUS Version 6.1 Module: ID:
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