Two-Way Radio User Manual

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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 nam es 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 exce ssive distortion for c rushable materials. This is the default value
for elements with hyperelastic or hyperfoam materials. The DISTORTION CONTRO L param eter
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 m aterials.
ELEMENT DELETION
In ABAQUS/Explicit this parameter applies to all elements with progressive damage beha
vior
except connector elements. In ABAQUS/Standard this parameter applies to cohesive elements
,
connector elements, and elements with plane stress formulations (plane stress, shell, continuu
m
shell, and m embrane elements).
Set ELEMENT DELETION=YES to allow elem ent deletion when the element has completely
damaged. This value is the default for all elements with a damage evol ution model. However, this
value is not applicable to pore pressure cohesive elements.
Set ELEMENT DELETION=NO to allow fully damaged elements to rem ain in the
computations. The elem ent 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 elem ents 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, m embrane, finite-strain
shell elem ents with reduced integration and modified tetrahedral or triangular elements in
18.1–2
ABAQUS Version 6.1 Module:
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