ABAQUS Volume II: I–Z - Manual (Page 381)

*SECTION CONTROLS
18.1 *SECTION CONTROLS: Specify section controls.
WARNING: Using values larger than the default values for hourglass control can
produce excessively stiff response and sometimes can even lead to instability if the values
are too large. Hourglassing that occurs with the default hourglass control parameters
is usually an indication that the mesh is too coarse. Therefore, it is generally better to
refine the mesh than to add stronger hourglass control.
This option is used to choose a nondefault hourglass control approach for reduced-integration elements
in ABAQUS/Standard and ABAQUS/Explicit and modified tetrahedral or triangular elements in
ABAQUS/Standard or to scale the default coefficients used in the hourglass control. In ABAQUS/Explicit
it is also used to select a nondefault kinematic formulation for 8-node brick elements, to choose the
second-order accurate formulation for solids and shells, to activate distortion control for solid elements, to
scale the linear and quadratic bulk viscosities, to specify whether elements must be deleted when they are
completely damaged, or to specify a value of the scalar degradation parameter at or above which elements
are assumed to be completely damaged. It is used in conjunction with the *MEMBRANE SECTION,
*SHELL GENERAL SECTION, *SHELL SECTION, and/or *SOLID SECTION options. It can be used
with *BEAM SECTION and *BEAM GENERAL SECTION to scale the linear and bulk viscosities. It can
also be used with the *SOLID SECTION, *SHELL SECTION, *MEMBRANE SECTION, *COHESIVE
SECTION, and *CONNECTOR SECTION options to specify whether elements must be deleted when they
are completely damaged, to specify a value of the scalar degradation parameter at or above which elements
are assumed to be completely damaged, or, in ABAQUS/Standard, to specify the viscosity coefficient that
controls the viscous regularization.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
References:
•
“Section controls,” Section 21.1.4 of the ABAQUS Analysis User’s Manual
•
*COHESIVE SECTION
•
*CONNECTOR SECTION
•
*MEMBRANE SECTION
•
*SHELL GENERAL SECTION
•
*SHELL SECTION
•
*SOLID SECTION
18.1–1
ABAQUS Version 6.1 Module: ID:
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