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SECTION CONTROLS
ABAQUS/Standard and ABAQUS/Explicit. Any data given on the data line will be ignored for
this case.
Set HOUR GLASS=RELAX STIFFNESS (default for ABAQUS/Explicit, except for elements
with hyperelastic and hyperfoam ma terials) to use the integral viscoelas tic form of hourglass control
for all elements with reduced integration in ABAQU S/Explicit.
Set H OUR GLASS=STIFFNESS (default for ABAQUS/Standard, except for elements
with hyperelastic and hyperfoam materials and modified tetrahedral or triangular elements)
to define hourglass control that is strictly elastic for all elements with reduce d integration in
ABAQUS/Standard and ABAQUS/Explicit and modified tetrahedral or triangular elem ents in
ABAQUS/Standard.
Set HOURGLASS=VISCOUS to define the hourglass damping used to con trol the hourglass
modes for solid and membrane elements with reduced integration in ABAQUS/Explicit.
INITIAL GAP OPENING
This parameter a pplies only to AB AQUS/Standard analyses using pore pressure cohesive elements.
Set this parameter equal to the value of the initial gap opening used in the tangential flow
continuity equation for pore pressure cohesive elements. The default value is 0.002.
KINEMATIC SPLIT
Include this parameter to change the kinematic formulation for 8-node brick elements o nly.
Set KINEMATIC SPLIT=AVERAGE STRAIN (default in ABAQUS/Explicit) to use the
uniform strain formulation and the hourglass shape vectors in the hourgla ss control. This is the
only option available for ABAQUS/Standard.
Set KINEMATIC SPLIT=CENTROID to use the centroid strain form ulation and the hourglass
base vectors in the hourglass control in ABAQUS/Explicit.
Set KINEMATIC SPLIT=ORTHOGONAL to use the centroid strain formulation and the
hourglass shape vectors in the hourglass control in ABAQUS/Explicit.
If SECOND ORDER ACCU RACY =YES, the K INEMATIC SPLIT parameter will be reset to
AVERAGE STRAIN in ABAQUS/Explicit.
LENGTH RATIO
This parameter applies only to ABAQUS/Explicit analys es and is valid only when the
DISTORTION CON TROL parameter is used.
Set this parameter equal to
( ) to define the length ratio when using distortion
control for crushable materials. The default value is
.
MAX DEGRADATION
In ABAQUS/Explicit this parameter applies to all elements with progre s sive damage behavior
except connector elements. In A BAQ US/Standard this parameter applies to cohesive elements,
connector elements, and elements with plane stress formulations (plane stress, shell, continuum
shell, and membrane elements).
Set this parameter equal to the value of the damage variable at or above which a material point
will be assum ed to be completely damaged. This parameter also determ ines the amount of residual
stiffness that will be retained by elem ents for which the ELEMENT DELETION parameter is set to
18.1–3
ABAQUS Version 6.1 Module:
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