Release Notes for Version 970/Release 4 (revision 6763)
October 2005
(Highlights modifications made since release of revision 5434a)
_________________________ Material models ______________________________
Updated mat_151 for solid elements.
Fixed mat_77 for shells.
Fixed bug in mat_183.
Fixed double-single precision problem in mat_106.
Made fixes to mat_040 shells and solids.
Made modification to bypass deletion of solid element when using mat_126
with the reference geometry option.
Fixed problems in rubber material mat_027 and mat_181.
Added upper bound for strain rates in mat_024 for shells with viscoplastic
rate formulation.
Added table of temperature-dependent yield curve for mat_106.
Made minor fix to high explosive model
Fixed unit system 1 in wood material mat_143 (cm changed to mm).
Corrected pressure term in mat_147.
NPLOT=5 in mat_147 outputs pore water pressure to "plastic strain" location.
Made minor fix to mat_add_erosion.
Fixed read error of LCSR in mat_112.
Fixed strain rate parameter in mat_ 112.
Corrected stress calculation in 2D solids for mat_098.
Added updates to mat_101.
Fixed bug in mat_181.
Modified mat_119 to use small strains rather than displacements.
Added modifications to mat_151 recieved from Sandia.
Added mat_151 (mat_emmi = Evolving Microstructural Model of Inelasticity).
Added deletion of solid element spotwelds if surrounding shell elements
fail.
Fixed problem with mat_024 combined with tet type 10.
Fix for density scaling in mat_147.
Added improved formulations of FORM 2,3,4 for mat_fabric.
These are FORM 12, 13, and 14, respectively.
Fixed Toyota's spotweld failure model to handle shared spotweld nodes.
Fixed *MAT_58 input problem (details not available).
Activated crash front calculation in composite materials.
In mat_15, log is now taken of a number not less than 1.0.
Thus (1+c*ln(epsdot)) and (1+D4*ln(epsdot)) are not less than 1.0.
Added viscoplastic option to mat_123.
Fixed problem with mat_181 for shell elements in single precision.
Added failure model to material 181.
Fixed minor bug in mat_024 shells with VP=1 where rate parameters C & p
were used in addition to the table definition.
Added viscoplastic strain rate to mat_024 as the first history variable.
Fixed mat_082 for VP=0. Failure did not occur for a simple test case
using the C and p rate constants.
Fixed mat_024 for VP=1. Error related to interpolation between
curves when table definition is used.
Fixed mat_098 for solid elements related to stress initialization
using the dynain file. The volumetric strain must be initialialized.
Fixed bug in solid element mat_103 when cmpflg=1 and aopt=0.0.
Fixed timestep problem related to mat_054 and shell formulation
type 8.
Fixed barlat_yld96 material model. The wrong load curve is used if
the curve option is active.
Fixed bug in seismic beam, mat_191.
Fixed bugs related to spotweld material option opt=1. Rate effects
were not working correctly.
Added support for non-Newtonian viscosity variations via load curve or by
power law in MAT_NULL.
Fixed problem with mat_183 shell elements related to single precision.
Fixed problem with mat_156 to handle large load curve ID's in single precision.
Added muscle model for truss element.
Added mat_183, a variation of mat_181 but with a damage curve.
Fixed timestep calculation for mat_106.
Fixed problem in mat_023 related to user integration rules that reference Part IDs.
Made minor fix related to large load curve numbers in mat_083.
Added mat_155 (ice model).
Added support for types 6 and 7 hourglass control for solid material
types 85, 102, 109, 110, 111, 112, 115, 120, 131, 132, 141, 147, 151, 153,
154 159, 164, 169, 176, 180, 192, 198, and 200.
Added reference geometry option to mat_083.
Fixed bug in 2D solid element related to mat_002 and full integration.
Added cutoffs for the green strain tensor in fabric material for options
2,3, and 4. Round-off error can cause instabilities.
Fixed problem with viscoelastic mat_065.
Fixed bugs in mat_059 for solid elements affecting transverse tensile
failure and reversal of transverse shear strengths.
Added new failure criteria for 2D mat_010 elements.
Fixed bug affecting strain output of mat_058 when EC=0.
Corrected a bug that could cause spotweld failure option 7 to use the
default failure values rather than the failure values from the table.
Fix to slope in type 4 spring material.
Made changes to mat_124 failure model.
Updated mat_075 per Paul Du Bois.
_________________________ Element formulations _________________________
Shell formulations 4, 11, 16, and 17 can now model rubber.
Corrections made to shell formulations 2 and 7 for rubber.
Fixed a bug in shell formulation 18.
Updated shell formulation 15 for consistency, accuracy, and speed.
Corrected mass calculation in solid formulation 12.
Corrected time step calculation for cable elements.
Fixed incorrect thickness in 2D plane stress solid.
Corrected seatbelt bug caused by incorrect index used in the retractor array.
Fixed a bug in shell formulation 21: yz- and zx-stress/strain components
were misplaced.
Fixed formulation 15 solid (prism) to correct NaN problem triggered by
stiffness damping.
Fixed possible problem in stiffness damping in Hughes-Liu beam elements.
Fixed problem with stiffness damping in shells and solids. The implementation
was incorrect for the type 2 and 3 solids and the energy calculation was wrong.
For shells, the damping stresses were sometimes overwritten before energy was calculated.
Fixed inertia calculation for formulation 16 tetrahedron.
Corrected 2D hourglass stiffness for axisymmetric formulation 15.
Fixed input problem when number of element_inertia exceeds 99999.
Fixed beam end release problem.
Fixed problem with tet formulation 16 combined with mat_004.
Fixed problem with local stresses in 2D solid elements.
Fixed problem related to massless nodes in discrete beams.
Added new pretensioner type 7 in which the pretensioner
and retractor forces are calculated independently and added.
Fixed NFAIL option related to rubber material and fully integrated elements.
All elements were deleted in the first time step.
Fixed bug in truss element stiffness and added geometric stiffness.
_____________________________ Contact __________________________________
Fixed problem with contact_auto...tiebreak option=5 related to cutoff of decay curve.
Fixed problem with contact_auto_..tiebreak contact for option=1.
Fixed problem with contact_auto_..tiebreak contact related to searching and offsets.
Fixed forming contact in SMP where the shell thickness is greater than
the edge length.
Added option to automatically switch from type 9 tiebreak surface to surface contact
to automatic tiebreak.
Added a check for improperly tied solid spotweld elements that lack
table data for spotweld failure OPT=7.
If soft=2 contact is requested for a keyword that is not supported, it
now switches to soft=1 instead of soft=0.
Added revision 3858's node-to-surface eroding contact back as an option.
Fixed segment-based contact energy and rcforc output when elements erode.
Fixed segment-based contact problems. One problem occured with incorrect
detection of penetration when there was extreme compression of solid elements (foam).
Added options to control birth and death time of contact when dynamic relaxation is active.
Added scaling of spotweld failure (*control_spotweld_beam).
Added error termination when requesting constraint-based contact with rigid bodies
in explicit computations.
Made change to eroding surface-to-surface contact to make it behave more like
revision 3858.
Modified area check of contact segments to allow smaller segments to be used.
Fixed 2D automatic contact to prevent likely penetration from occuring
after eroding solid element expose new segments.
Fixed a potiential memory allocation error in segment-based contact
that could cause a segmentation fault during a run. The error
is only known to have occured with solid elements in combination with eroding contact.
Added guided cable contact.
Add consideration of true out-of-plane thickess of 3D shells when used with
2D automatic contact. Previously, a unit thickness was assumed because the
use of 3D elements with 2D contact was not anticipated.
Fixed the sliding option of segment-based contact when used with triangluar
segments.
Changed the release criteria for forming contact to prevent premature release.
Added option whereby negative contact damping coefficient becomes a flag for
damping all velocity components, not just the normal velocity component.
___________________________ Adaptivity _________________________________
Fixed bug in *SET_GENERATE... options for adaptivity.
Fixed bug in look-forward h-adaptivity (too many elements refined).
Fixed d3plot and restart problems for 3D r-adaptivity.
Fixed bug that resulted in missing d3plot files in adaptive runs.
Increased some local array sizes to handle larger 2D r-adaptive problems.
Made many improvements to the triangular surface remesher in support of
3D r-adaptivity.
Made minor tolerance changes for symmetry planes and 3D adaptivity.
Fixed volume conservation and mass loss issues with 3D adaptivity.
Added feature to control h-adaptivity level by load curve.
Fixed 2D adaptive dynain corruption problem.
Fixed problem with stiffness damping used in combination with adaptivity.
Fixed problem of failed elements reappearring after mesh is adapted.
Added new option for IADPGH in *CONTROL_ADAPTIVE.
IADPGH=0 split main and neighbor elements
IADPGH=1 split maine element only
Added curve to specify 2D adaptive mesh size.
Added *DEFINE_SET_ADAPTIVE so that
the user can define the adaptivity refineement level by part or element set.
Added adpsize option to *DEFINE_SET_ADAPTIVE.
Made fix to 2D adaptivity related to missing lumped masses after
first adaptive step.
___________________________ ALE ________________________________________
Added ALE birth time option.
Updated coupling type 5 (coupling to eroding parts).
Added mat_025 for ALE.
Added option in *INITIAL_VOLUME_FRACTION_GEOMETRY to control degree of
refinement used in each ALE element to calculate initial volume fraction of
each material.
Added a new coupling stiffness option to *constrained_lagrange_in_solid.
(uses slave bulk modulus, mass-weighted penalty).
Added a soft constraint coupling option.
Added an option to terminate the run if the
critical time step calculated from ALE is less than dt2ms.
Fixed a bug in *initial_volume_fraction_geometry in which
the initial guess on which segmental normal to use was wrong in some cases.
Fixed a bug that would cause ale_reference_system_group to function abnormally.
Modified leakage control type 2 for ALE coupling to adjust velocities in order
to better conserve energy.
Eliminated mass scaling for ALE elements to avoid problems.
Added option for considering shell thickness in constrained_lagrange_in_solid.
Modified codes so that all gas species of mat_gas_mixture are considered in estimating
ALE point source inlet gas velocity.
Fixed bug in ALE interface reconstruction if number of materials is
greater than three in an element.
Added alternate names for all materials specific to ALE:
(1) MAT_VACUUM -> MAT_ALE_VACUUM or MAT_ALE_01
MAT_GAS_MIXTURE -> MAT_ALE_GAS_MIXTURE or MAT_ALE_02
MAT_NULL -> MAT_ALE_VISCOUS or MAT_ALE_03
MAT_MIXING_LENGTH -> MAT_ALE_MIXING_LENGTH or MAT_ALE_04
Fixed the ALE sensor option to use only the segment center
as the sensing point.
Added mass output to d3plot and d3thdt for each multimaterial group.
Disabled ALE coupling with nodes and always default to element quad points.
Implemented ALE multi-material switching (*ALE_FSI_SWITCH_MMG).
This option will allow user to switch the material group ID after it flows through
a defined section set. Using this option, coupling can occur from either side
of a Lagrangian surface. Report mass of switched material in
the porosity field of dbfsi.
Updated ALE coupling to accommodate all element shapes including tets.
Fixed a bug affecting ALE reference system 4.
Added ability to assign initial velocities using *INITIAL_VOLUME_FRACTION_GEOMETRY.
Added a new algorithm for *INITIAL_VOLUME_FRACTION_GEOMETRY that accounts for more
than just convex shell/segment surfaces.
Fixed bug in ALE reference system 9.
Implemented *load_ale_convection for simulating heat convection
from ALE fluid to Lagrangian structure. Write temperature change
to dbfsi.
Fixed bug for lvel=0 in AIRBAG_ALE
Fixed bug affecting ALE FSI sensor.
Added capability to allow NORM in CONSTRAINED_LAGRANGE_IN_SOLID to take
a value between 0 to 1. The normal of the penalty springs can now be:
a. segment-based normal
b. nodal average of the segment-based normal (weighted by segment area)
c. a blend of (a) and (b)
Option c avoids the need to define multiple coupling commands in some cases.
Added support for ALE reference pressure in element formulations 5,6,7.
Fixed problem in EOS_IDEAL_GAS used in element formulations 5,6,7.
Added translational and expansion constraints for
ALE_REFRENCE_SYSTEM_GROUP type 5.
Changed default gas mixture option for AIRBAG_ALE to non-linear cv, cp model.
Added pop pressure and venting curve in AIRBAG_ALE option.
Added DATABASE_FSI_SENSOR option to get ALE element pressure at the sensor
location and output to "dbsensor" file.
Reinstated ALE solid 7 ambient type 3 condition which was disabled accidentally.
Implemented new ALE FSI interface forces file to get binary database
similar to contact's INTFOR database.
To activate the option:
(1) add h=filename to execution line
(2) set flag in *CONSTRAINED_LAGRANGE_IN_SOLID
*DATABASE_BINARY_FSIFOR defines the output frequency.
Added new option to POINT_SOURCE to evenly distribute momentum
among nodes.
Implemented _ID and _TITLE option card for
CONSTRAINED_LAGRANGE_IN_SOLID.
Fixed advection for wedge elements.
Fixed bug in which kinetic energy of the inlet gas was not properly
compensated for in the internal energy
Fixed bug affecting zero load curve velocity for Point Source.
Added ALE initial penetration option in CONSTRAINED_LAGRANGE_IN_SOLID.
Made correction to heat convection in ALE coupling while using mat_148 with
nonlinear cv,cp formulation.
Added ALE reference system 9 - new option to create smoother expansion of meshes
that includes a fixed part.
Implemented exclude part list for ALE_REFERENCE_SYSTEM type 9 to avoid
point source from moving outward from the critical region.
Added option for ALE_REFERENCE system 9 to only allow expansion but not
shrinking of ALE mesh.
Added a box option for CONSTRAINED_LAGRANGE_IN_SOLID for slave
segments so that only segments inside the box get coupled with fluid.
Added option triggered by negative porosity pressure curve ID in
CONSTRAINED_LAGRANGE_IN_SOLID whereby porosity comes from MAT_FABRIC.
___________________________ SPH ________________________________________
Added mass of SPH elements to d3plot files.
Fixed problem with tied SPH particles.
Added a test on mass of SPH element during initialization.
Fixed bulk viscosity computation for all the SPH formulation.
Fixed a bug with *define_box_sph. Box was not moving
even with the definition of the load curve.
Fixed bug in initialization of mat_008 SPH elements.
All the SPH elements were detonating at time=0.
Fixed bug in SPHOUT . An Error Termination
occured when *DATABASE_SPHOUT was defined before
the *DATABASE_HISTORY_SPH keyword in the input deck.
Implemented MAT_ISOTROPIC_ELASTIC_FAILURE (mat_013) for
SPH elements.
Fixed bug in *BOUNDARY_SPH_SYMMETRY_PLANE.
Lagrangian nodes (of shells and solids) were constrained
by this boundary condition.
Fixed bug in SPH non-reflecting boundary.
Improved efficiency of SPH initialization.
_____________________________ EFG ____________________________________
Added 2nd order objective stress update to 3D EFG.
This is controlled by *CONTROL_ACCURACY
Added 6-noded and 4-noded elements for EFG.
Corrected EFG 2D contact with beam elements.
_____________________________ Output ____________________________________
Added version number to lstc binary files: d3plot, d3thdt, d3part, etc.
Changed banner, binout, and ascii file headers to include version
number, revision number, mpp/smp, and single/double indicators. Header
format will now match new 971 format.
Changed xtfile to 32-bit format if LSTC_BINARY=32ieee.
Removed extra data in rbdout file.
Fixed bad write to d3plot when a tie-break is used and some nodes are moved.
Added write to all ASCII files at termination time.
Fixed d3crack output if LSTC_BINARY=32ieee is set.
Fixed missing header for nodout in a full deck restart.
Disable dbfsi and dbsensor if there is no FSI coupling defined.
Corrected temperatures written to the drdisp.sif file for itemp=-2
and itemp>0.
Fixed error in nodfor file. All forces were zero if node is attached
to a rigid body.
Fixed calculation of strain tensor that is output for type 4 tetra element.
Fixed a bug in d3plot output when DECOMP=3 or 4 (*DATABASE_EXTENT_BINARY)
in the case of a thermal problem.
Added output of all ASCII and intfor data at the termination time.
Fixed jntforc binary output to be in agreement with the ASCII output.
Changed default scale factor for binary file size from x=7 to x=70.
Fixed bug in beam d3plot output to correct viewing of beams as
prisms in LS-Prepost.
Fixed bug in *COMPONENT_GEBOD segment acceleration output.
(Affected reported accelerations of lower legs in
d3plot, nodout, and rbdout. Motion of the dummies was unaffected.)
Made change to binary ncforc output for eroding surfaces. Since the number of
nodes can change each state, write the ids array in each output state, but
only for eroding contacts.
Fixed bug in writing D3PART if any ale elements is requested.
Fixed bug in writing D3PART if DCOMP=3 or 4 is defined in *DATABASE_EXTENT_BINARY.
Updated format for all ASCII files.
Fixed problem of IDs in swforc file in binary output: user ids were not
being output for nodal constraints or generalized welds.
Added sleout output for 2D contact and added binout output of
2D contact rcforc, ncforc, and sleout.
Fixed ALE tracer particle output problem.
Changed signs on type 4 beam stress resultants to be consistent with
types 1 and 2.
Fixed a bug in d3plot for linear shell elements 18, 20, and 21.
Fixed initial rotational velocities written to nodout files. Nodes belonging
to rigid bodies had their t=0 velocities written as 0.0.
Fixed beam resultants in elout file so type 1 and 2 beams agree.
Corrected sign of beam moments in secforc file.
Fixed bug in elout for linear shell formulations 18, 20, 21.
Corrected strain output to elout file for material 34 forms 3 and 4.
Fixed bug in binary swforc output for generalized welds in MPP.
Fixed secforc file for 1-pt solid elements for implicit computations.
Cleaned up thick shell output.
Fix force output for Lagrange Multiplier joints.
Fixed output of shell resultants for materials 22, 54, and 55 when CMPFLG=1.
Added option CMPFLG=2 which overwrites resultants as requested by NASA.
Fixed output to swforc for implicit.
Added resultant moments to swforc file for Toyota weld option with table.
Fixed binout output for solid type=3.
Correct reporting of joint forces to JNTFORC file for implicit simulations.
Added *DATABASE_BINARY_D3PROP for writing the material and property data to
the first d3plot file or to a new database (d3prop).
Corrected output of reaction forces to bndout for rigid bodies in implicit.
Removed warning messages if the number of history blocks exceeds 2000.
Added MASS_PROPERTIES option to include mass and inertial properties in
the glstat and ssstat files.
Fixed bug in writing d3thdt.
Fixed ASCII file SBTOUT in restart run.
Fixed cross_section problem.
Fixed bug in dynain related to output of undefined beam elements.
Fixed problem with accelerometer output.
Added option in *CONTROL_CPU to output cpu/elapsed time in glstat file.
Corrected the writing of beam reference nodes to d3eigv.
Added output of material fit data to messag file (convenient for plotting) for
mat_077 (Ogden) when N=3 or N=4. Previously, data was written only when N=2.
Fit data is also written for mat_027.
Fixed 2D automatic contact pressure calculation for ncforc output. Before
fix, in-plane rather than out-of-plane thickness was used to evalutate the
tributary area so pressure magnitudes were wrong.
Fixed bug for d3thdt output to prevent creation of many small files.
Added extra history variables in d3thdt file for ALE solid 11, 12 elements
to show correct rho, volume fraction in the history file.
Limited the time for the next d3plot output to be endtim for implicit.
Added beam elements to the dynain file.
Fixed bug in binout swforc data in the case where there are both
solid and beam spotwelds.
Fixed output of thick shell data to both d3iter and d3eigv
databases for implicit analysis.
Fixed bug in writing dynain after restart.
Fixed d=NODUMP option.
Fixed bug affecting ID on DATABASE_HISTORY_NODE_ID.
_____________________________ Restarts ___________________________________
Fixed bug related to restart and user-defined materials.
Fixed full deck restart with SPH elements.
Made various fixed for full deck restart.
Fixed 2 problems related to LSDA/binout and restarts:
Fixed bug affecting tied contact in full deck restart to correct problem
where length of spotweld beams increased after each restart if the beam
was offset from the surface.
Fixed full deck restart for changing initial velocity.
Fixed bug in full deck restart in which adaptivity was used in
combination with *INTERFACE_SPRINGBACK_LSDYNA.
Fixed full deck restart bug involving failed beam elements.
The deleted beam elements reappeared again after full deck restart.
Fixed restart problem affecting deletion of ALE parts and deletion
of ALE coupling.
Fix restart problem involving rubber material.
Added hourglass forces to the full deck restart file to correct differences
observed between runs that used the full deck restart versus those that do
not. This is important for calculations that use solids with the stiffness
form of the hourglass control.
Implemented DELETE_FSI command for small restart to activate or delete
Lagrange_in_solid coupling. It is implemented
similiar to DELETE_CONTACT. A negative ID activates coupling.
__________________________ Rigid Bodies ________________________________
Fixed output bug for locking joints and translational joints.
Fixed rigid body stoppers when rigid body is constrained in local coordinate
system. Constraint was being violated.
Fixed problem with initial velocities and rigid bodies with prescribed
accelerations.
Fixed bug in *CONSTRAINED_NODAL_RIGID_BODY if any negative number
is used for displacement release flags.
Fixed a load curve ID problem for curves defining joint friction.
Added error termination if rigid body is slave to contact_entity.
Fixed calculation of joint energy.
Fixed bug related to Nodal_rigid_body_spc_inertia.
Fixed bug affecting right ankle of *COMPONENT_HYBRIDIII.
Fixed locking joint when Lagrange multipliers are used.
Fixed bug related to qlo and qhi activation angles for shoulder abduction
in all *COMPONENT_HYBRIDIII dummies.
Made minor fix to automatic rigid body constraint determination.
___________________________ Implicit _________________________________
Corrected initialization of tied contact constraints for implicit when
explicit/implicit switching is activated.
Adjusted implicit logic for artifical stablization in a forming
simulation with automatic time step control.
Made minor fix to implicit eigenvalue solution.
Enabled Interface_springback_seamless after implicit transient analysis.
Fixed bug in prescribing x-rotational b.c. in implicit analysis.
Adjusted default setting when using full newton with implicit nonlinear.
Deactivate line search by setting lstol = -1.0.
Fixed problem with beam stresses when switching from implicit to explicit.
Implemented mat_98 for solids in implicit.
Fixed switch controls via d3kil file to work with implicit.
Made change to retain internal energy data when switching from explicit to implicit.
Enhanced implicit mechanics to correctly handle spotweld failures.
Fixed implicit mat_003. Bad tangent modulus resulted in slow or no
convergence.
Enabled *control_cpu in implicit.
Fixed bug in glstat energy balance when running implicit.
Corrected treatment of joints when switching from
implicit to explicit. Penalty factor needed to be computed correctly.
Fixed implicit's loading of rigid body constraints in local
coordinates for seamless springback problems.
Improved convergence of implicit 2D automatic contact when the the sliding option
is active.
Turned off damping in spotweld material if implicit static analysis is active.
Fixed problem of active dampers during implicit static analysis.
Fixed 2D axisymmetric shell to correct frequency problem.
Installed 971 treatment of constrained joints for implicit mechanics.
Fixed bugs in implicit dynamics and disabled Rayleigh damping since
not properly implemented for implicit solutions.
Made change to deactivate damping during static implicit run.
Made change to automatically switch to type 10 shell if type 8 is
requested for implicit.
__________________________ Miscellaneous ________________________________
Made 970 structured input file compatable with version 971.
Fixed bug if *INCLUDE_NASTRAN is used.
Fixed an error in checking VDA binary file.
Fixed bug if title contains an ampersand.
Fixed round-off error related to initial and prescribed velocities.
Fixed load curve ID round-off problem in LOAD_THERMAL_option.
Fixed load curve interpolation problem.
Fixed bug for *define_box_drawbead.
Fixed mass scaling bug affecting solid elements.
Made fixes to define_transformation and include_transform affecting:
- initial velocities
- mat_084, mat_076
- airbag_simple_pressure
- rigid body stoppers
- MAREA in section_shell
- damping coefficient
- rigidwalls
- inertia when bodies are rotated
- nodal rigid bodies
- cross-sections
Added option POINT for *define_transformation to provide a means of
defining rotations about axes that are reoriented due to previous
transformations.
Fixed energy consevation problem related to constrained_interpolation.
Increased the default memory size from 8500000 to 20000000.
Fixed error in *CONSTRAINED_LINEAR.
Removed obsolete keywords:
*CONTROL_OPTIMIZATION_TAGUCHI
*CONTROL_OPTIMIZATION_DESIGNVARIABLE
*CONTROL_OPTIMIZATION_PROPERTY
Added new keyword *INCLUDE_PATH that defines a directory in
which to look for include files.
Fixed dynamic relaxation when used with the Wang-Nefske Airbag model.
Fixed a bug in superplastic forming simulation so that an
arbitrary load curve id can be used for SPF.
Added an error termination for bad cyclic symmetry definition.
Added active part set option for nfail1 and nfail2 on *CONTROL_SHELL.
Centered hourglass control type 6 correctly when 2nd order stress updates
are used. This can help meshes that spin.
Added *TERMINATION_DELETED_SHELLS to terminate when a specificed number
of shells have been deleted from a part or part set.
Fixed bug in internal rediscretization of load curve.
Fixed negative volume calculation to erode solid elements.
Activated new features for superplastic forming simulation.
Fixed bugs in *PARAMETER.
Airbag_hybrid_chemkin can model convection energy loss from the gas in the
airbag to the environment. Added this feature to:
- airbag_wang_nefske
- airbag_hybrid
Fixed bug related to rigid beams impacting rigid walls.
Fixed bug affecting tied_nodes_with_failure used with triangular segments.
Made change so that multiple SPC cards for one node are now respected
unless more than one coordinate system is referenced in which case
an error termination will occur.
Previously, only the last of the multiple SPCs was respected.
Installed updates from MSC for NASTRAN/DYTRAN reader.
Reinstated Lagrange to Lagrange coupling which had inadvertently been
disabled in *constrained_lagrange_in_solid.
Fixed kinetic energy calculation when RBE3'S (constrained_interpolation)
are used.
___________________________ MPP contact _________________________________
Made fix for rigid body boundary conditions in case some processors do not
have the rigid body. Noise was being introduced into the solution in this
case (MPP).
Fixed recent hang in MPP if there are contact interfaces but some processor(s)
end up with none.
Made modification to forming contact for MPP to handle slave surfaces from
solid elements. The "don't allow contacts from below" logic was causing
these to be ignored (since they have no thickness and were never seen
until they were below the surface....).
Fixed bug affecting interface forces file output. The segment set was not output
correctly and corrupted the file (MPP only).
Fixed bug that could cause incorrect initial penetration results for
some nodes in MPP surface_to_surface and node_to_surface contacts.
Added damping for beam-to-beam contact (MPP only).
Fixed rigid/rigid contact option 1 without friction (MPP only).
Fixed MPP segment-based contact error that could occur if contact
involved eroding solid elements but the ERODING contact option was not
used.
Added read of PENMAX parameter for surface to surface eroding
contacts in MPP. This allows the release penetration distance to vary
from the default value of 0.5*segment thickness.
Fixed bug in normal failure calculation in tiebreaks (MPP only).
Fixed OFFSET tied contact in MPP if the slave node is tied at the
corner point of a triangular shell -- the normal vector was computed as 0.
Added guided cable contact (MPP).
Added MPP support for automatic tiebreak option 5. Options 1 to 5 are
now supported.
Fixed beam-to-beam contact problem (MPP only).
Made fix to MPP eroding contact in case where no materials were specified.
Contact was ignored on any processor that contained no solid or thick shell elements.
Now including check for shell elements.
Fixed N2S eroding contact (MPP only)
Fixed problem of MPP occasionally including internal segments in the active
contact surface for eroding contact.
Fixed typo that caused failure of type 23 contact (MPP only).
Fixed calculation of master energies in tied contacts. Shared nodes were
being counted more than once. (MPP only)
Fixed a sign error in the force application for MPP drawbeads.
Fiaedx bug in MPP drawbead initialization that
only showed up in some double precision versions.
Removed eroded segments and deleted nodes from the tiebreak
interface to get proper response (MPP only).
Added MPP support for user input PARMAX and increased the contact searching area.
Fixed possible failure of MPP contact when *DAMPING_PART_MASS was used.
Changed behavior of MPP drawbead contact to re-interpolate the
drawbead nodes each cycle. This avoids cumulative roundoff problems that
were causing strange drawbead forces when then tooling was not stationary.
Added MPP support for new contact viscous damping option (VDC<0) to
contacts type 3/4/5/10/13/26.
Fixed MPP initialization of tied contacts when PART_CONTACT thickness is
specified.
Fixed force transducer problem that occurred during initialization.
_________________________ MPP Only (Miscellaneous) _____________________________
Corrected numbering of d3hsp file in a restart (MPP).
Fixed bug affecting output of interface forces file INTFOR (MPP).
Added support of *INITIAL_VEHICLE_KINEMATICS (MPP only).
Made bug fix for jntforc translation (MPP only).
Implemented stress initialization by parts in full deck restart (MPP only).
Implemented CHANGE_VELOCITY_ZERO option for full deck restart run (MPP only).
Made bug fix to secforc coordinates system (MPP only).
Corrected MPP handling for airbag interaction with control volume
types 10 and 11.
Added support for *damping_frequency_range option (MPP).
Fixed bug in MPP implementation of linear constraint equations
and added support for LOCAL option of linear constraints.
Added options to control birth and death time when dynamic relaxation is active.
(MPP)
Added 3D adaptivity (MPP).
Added MPP support for *control_spotweld_beam.
Fixed MPP initialization of rigid body initial velocity.
Added MPP support for solid spotweld failure.
Added support of ALE tracer particle (MPP).
Fixed MPP Madymo coupling problem.
Implemented component_hybridIII (MPP).
Fixed MPP memory error that occured when *CONSTRAINED_LAGRANGE_IN_SOLID
coupling types 1 to 3 were used and there were no ALE parts.
Fixed bug in ALE coupling when shells are deleted (MPP).
Added basic support for ALE eroding coupling ctype=5 (MPP only).
(Not as evolved as SMP implementation.)
Made Madymo coupling run more efficiently with MPP.
Changed MPP to allow total size of d3thdt files to exceed 2GB.
Added recognition of LSTC_BINARY=32ieee to MPP so that 64 bit executables
can output 32 bit output.
Made change to write error and terminate run if user tries to
restart from a dump on a different number of processors than the original run.
Previously, job would hang.
Added MPP support for nfail (termination on shell element failure) option.
Implemented *load_mask in MPP.
Implemented tetrahedron formulation 13 in MPP.
Fixed problem with *DELETE_CONTACT option.
In some cases, the contact to be deleted is not in the processor 0 and then
the delete info was not output to the d3hsp01 file. (MPP only)
Implemented coordinated termination in MPP for some errors (mass increase,
energy ratio, negative volume) so d3plot state is output and termination
is clean.
Fixed bug affecting porosity leakage through fabric when using ALE switching (MPP only).
Fixed bug in boundary_prescribed_motion_node (MPP only).
Made some fixes to MPP affecting shell history variable remapping during adaptivity.
Fixed bug in Madymo coupling (MPP only)
Removed duplicate CONSTRAINED_ADAPTIVTY in dynain file to avoid problem during
springback run (MPP only)
Made several improvements related to MPP handling of stress initialization/adaptivity.
Implemented new ALE FSI interface forces file for MPP.
Fixed two bugs in MPP adaptivity: if initial penetration tracking was on,
the tracked penetrations were lost at each adaptive step, resulting in
creeping penetrations. Also, some contact history was lost entirely when
there was more than one node in contact with any master segment.
These both resulted in dimples and lumps in the final stamped surface.
Fixed bug in nodal interface linking (MPP only).
Fixed SPH neighbor search (MPP only).
Improved memory allocation for SPH (MPP only).
Fixed SPH for 2D problems (MPP only).
Added Madymo 6.1 support (MPP).
Fixed bug for ALE reference system 9 (MPP).
Added support for SPOTSTP option for spotweld connected to rigid part (MPP only).
Fixed bug in dbout swforc data of solid spotwelds (MPP).