ABAQUS Volume II: I–Z - Manual (Page 382)

*SECTION CONTROLS
Required parameter:
NAME
Set this parameter equal to a label that will be used to refer to the section control definition. All
section control names in the same input file must be unique.
Optional parameters:
DISTORTION CONTROL
This parameter applies only to ABAQUS/Explicit analyses.
Set DISTORTION CONTROL=YES to activate a constraint that acts to prevent negative
element volumes or other excessive distortion for crushable materials. This is the default value
for elements with hyperelastic or hyperfoam materials. The DISTORTION CONTROL parameter
is not relevant for linear kinematics and cannot prevent elements from being distorted due to
temporal instabilities, hourglass instabilities, or physically unrealistic deformation.
Set DISTORTION CONTROL=NO to deactivate a constraint that acts to prevent negative
element volumes or other excessive distortion for crushable materials. This value is the default
except for elements with hyperelastic or hyperfoam materials.
ELEMENT DELETION
In ABAQUS/Explicit this parameter applies to all elements with progressive damage behavior
except connector elements. In ABAQUS/Standard this parameter applies to cohesive elements,
connector elements, and elements with plane stress formulations (plane stress, shell, continuum
shell, and membrane elements).
Set ELEMENT DELETION=YES to allow element deletion when the element has completely
damaged. This value is the default for all elements with a damage evolution model. However, this
value is not applicable to pore pressure cohesive elements.
Set ELEMENT DELETION=NO to allow fully damaged elements to remain in the
computations. The element retains a residual stiffness given by the specified value of MAX
DEGRADATION. In addition,
elements with three-dimensional stress states (including
generalized plane strain elements) can sustain hydrostatic compressive stresses, and elements with
one-dimensional stress states can sustain compressive stresses. This value is the default for pore
pressure cohesive elements and is not available for beam elements.
HOURGLASS
Set HOURGLASS=COMBINED to define the viscous-stiffness form of hourglass control for solid
and membrane elements with reduced integration in ABAQUS/Explicit.
Set HOURGLASS=ENHANCED (default for elements with hyperelastic and hyperfoam
materials in ABAQUS/Standard and ABAQUS/Explicit; default in ABAQUS/Standard and only
option in ABAQUS/Explicit for modified tetrahedral or triangular elements) to define hourglass
control that is based on the assumed enhanced strain method for solid, membrane, finite-strain
shell elements with reduced integration and modified tetrahedral or triangular elements in
18.1–2
ABAQUS Version 6.1 Module: ID:
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