What's New

Highlights

• Better support of LS-DYNA format keywords
• Improved ease of use with more automatic parameter setting and automatic model correction
• Better robustness and compatibility between different Radioss options
• Update of the coupling library with MADYMO 2020.1

New Features

Monitored volume

• Automatic correction of external surface normals to have them outward oriented.
• Automatic closing of open external surface of the monitored volume with a simple flat surface.

Engine file command line

• New option to read and write file hst_input.hstp (for better integration in HyperStudy).
  • -HSTP_WRITE: Radioss Starter writes the parameters (/PARAMETER) in the file hst_input.hstp.
  • -HSTP_READ: Radioss Starter reads parameter values from the file hst_input.hstp.
• New option to define nodal random distribution (noise) from the Starter command line:
  • -rxalea <random value>: to define the noise amplitude.
  • -rseed <seed value>: to initialize the random distribution.
• These options are available in the argument list of the Altair Compute Console.

Penality contact

• Thermal behavior is added in the contact interface /INTER/TYPE25 (for the node to surface part of the contact).
• Friction models are now available for the edge-to-edge behavior of the contact interface /INTER/TYPE25.

Material

• /MAT/LAW109: New tabulated elasto-plastic material with strain rate and temperature dependency, linear and logarithmic strain rate interpolation.
• /MAT/LAW110 (VEGTER): New material with Corus-Vegter material formulation.
• /MAT/LAW78: New yield surface option with Barlat 3 parameter plane stress and correction of the constitutive material formulation.

Nodal time step (/DT/NODA)

• New option to define the minimum time step with respect to the initial mass added ratio to the model (1st cycle).

Rigid body (/RBODY)

• New force failure parameters for normal and shear directions (defined from main node to secondary node).

Transformation (/TRANSFORM)

• New transformation option /TRANSFORM/POSITION to position a submodel or a set of nodes from 3 start nodes (or points) to 3 target nodes (or points).

Integrated beam element (/PROP/TYPE18)

• New output stress and strain tensor results for any integration point of the integrated beam element (/PROP/TYPE18) in the H3D files and time history file.
  • /H3D/BEAM/TENS/STRESS/NPT=i,ALL
  • /H3D/BEAM/TENS/STRAIN/NPT=i,ALL
  • /TH/BEAM

State file (/STATE)

• The card /BEGIN is added in the state file (.sta) with the working unit defined in the model.

LS-DYNA reader

• The following additional keywords can be read:
  • *BOUNDARY_PRESCRIBED_MOTION_RIGID
  • *CONSTRAINED_INTERPOLATION
  • *CONSTRAINED_JOINT_PLANAR
  • *CONSTRAINED_JOINT_UNIVERSAL
  • *CONTACT_AUTOMATIC_NODES_TO_SURFACE
  • *CONTROL_OUTPUT
  • *DAMPING_GLOBAL
  • *DAMPING_PART_STIFFNESS
  • *SET_BEAM_ADD
  • *SET_DISCRETE
  • *SET_DISCRETE_ADD
  • *SET_NODE_ADD_ADVANCED
  • *SET_SEGMENT
  • *SET_SHELL_ADD

Enhancements

Force vector output

• /ANIM/VECT/FINT also shows internal forces on the secondary nodes of rigid bodies.
• /ANIM/VECT/FREAC has been generalized to all kinematic conditions.
• /ANIM/VECT/FEXT now shows external loadings only (/CLOAD, /PLOAD, /GRAV, /MONVOL, …) and no longer includes the reaction forces due to kinematic conditions.
• Reaction forces are now available in /TH/NODE for secondary nodes of a rigid body (for example, REACX, REACY, ...).

Tied contact (/INTER/TYPE2)

• Improvement of secondary node projection on 3 noded shell surfaces.

Penalty contact

• /INTER/TYPE24: New flag to define a time duration to remove initial interference (Inacti=-1).
• /INTER/TYP25:
  • Improvement of the contact interface behavior with Inacti=5. Force was evident at Time=0 for some specific models.
  • Improvement of the contact interface behavior for some specific cases with boundary conditions (/BCS).
• /INTER/TYPE7 and /INTER/TYP25: Starter computation time reduction in cases where mesh size is smaller than gap value.

Materials

• /MAT/LAW0 (VOID): Void material is now compatible with beam and truss elements.
• /MAT/LAW1 (ELAST): Improvement of the computation time for solid elements with I_smstr=10.
• /MAT/LAW108: The density of the material can be null and the inertia in the spring property /PROP/TYPE23 (SPR_MAT) can be null
• /MAT/LAW44:
  • The values a, b and n are not used for the computation of the yield stress value when VP ≠1 and a yield curve is defined.
  • Strain rate filtering parameters are automatically defined by Radioss for VP=1.
  • Automatic strain rate cut off frequency value is defined by Radioss when the input value is zero.

Monitored volume

• /MONVOL/GAS: Improvement of computation performance when the simple gas monitored volume is used in large models using HMPP calculation.
• /MONVOL/FVMBAG1:
  • Correction of automatic meshing (kmesh > 0) for airbags defined with 4 noded shell elements. The Starter was failing with different error messages for specific models.
  • The option I_ttf = 3 was not working as expected for airbags meshed with kmesh = 14.

Shell property and default shell card

• /PROP/TYPE51: Improvement of the memory usage for the composite shell property in the Radioss Starter.
• /PLY: New Starter error message in case material is not defined for a ply. Without material the composite part behaves incorrectly.

Solid property (/PROP/SOLID)

• Stability improvements for models with /TETRA10 I_tetra10=2 elements, double precision, HMPP and /PARITH/OFF option.
• Improvement of solid element behavior after material failure. Some computation was still done.
• Improvement of element stability for degenerated brick elements for some specific mesh patterns.

Subdomain (/SUBDOMAIN)

• /INTER/SUB is now compatible with the subdomain approach.

ALE/FSI features

• Improvement of pressure mapping and volume fraction mapping with /MAT/LAW51.
• Development of /PARITH/ON and MPI with /MAT/LAW151.

LS-DYNA reader

• An error is now printed in case a keyword is not supported.
• *CONTROL_TIMESTEP: TSSFAC is now set as time step scale factor in /DT/NODA/CST card.
• *DATABASE_SWFORC: Spotwelds are added in the time history /TH/SPRING or /TH/BRIC.
• *MAT_020: Improvement of the reporting for the mapped information.
• *MAT_123: Improvement for the mapping of this material law to Radioss material law.
• *SET_NODE: The option COLUMN is now supported.
• *SET_PART: All input options for sets of parts are now supported.
• Mass and inertia are no longer added for the spring materials *MAT_S01, *MAT_S02, *MAT_S03, *MAT_S04, *MAT_S05, *MAT_S06 and *MAT_S08.

Radioss reader

• /STATE: Improved error message in case the referenced part does not exist in the model or card format is not correct.
• Improvement of the warning message (#666) for solid element connectivity to have a smaller element list.

Madymo coupling

• Update of the coupling library with Madymo 2020.1
• Updated coupling is available for Radioss SPMD/HMPP with Intel® MPI
• Previous coupling with Platform MPI is removed

Resolved Issues

LS-DYNA reader

• *BOUNDARY_PRESCRIBED_MOTION_SET: Input issue correction for VAD=1.
• *CONSTRAINED_RIGID_BODIES: Correction of reading issue when several rigid bodies are defined in a model.
• *SECTION_SHELL: The parameter SHRF is now ignored for the model mapping. The default value is always used for Radioss computation (best setting).
• *CONSTRAINED_SPOTWELD: Mapping improvement when several elements are specified inside the same card.
• *CONTACT_AUTOMATIC_SINGLE_SURFACE: Mapping correction if set is empty. The entire model was not selected.
• *DATABASE_RWFORC: Rigid walls are now output in the time history file.
• *DEFINE_COORDINATE_SYSTEM: The title is now correctly read.
• *INITIAL_VELOCITY: Correction of the initial velocity setting with rigid bodies and the different possible options for the initial velocity treatment of rigid bodies.
• *SET: Reading error correction of the set when there are several lines and the line is not completely filled.
• *SET_PART_ADD: Correction of the behavior where a negative sign is defined on the set ID. The Starter no longer fails.
• Correction of ID conflict between created /SKEW and /FRAME .
• Correction of ID conflict between sets with the same ID but different type.

Radioss reader

• //SUBMODEL: The local coordinate system (/SKEW) created to follow the motion of the submodel was not applied on the imposed motion (/IMPVEL, /IMPDISP or /IMPACC) from version 2021.
• /FAIL/TBUTCHER: Correction of reading issue. Radioss Starter no longer shows error for specific input.
• /FAIL/TENSSTRAIN: Improvement of the error message in case of wrong input in the /FAIL/TENSSTRAIN card (if ${\epsilon }_{t2}$ < ${\epsilon }_{t1}$).
• /INTER/TYPE12: This contact interface was not read in version 2021.
• /INTER/TYPE19: Correction of Radioss Starter numbering issue for specific models from version 2021.
• /INTER/TYPE21: Correction to Units of friction coefficients for different laws, STFAC, KTHE, FRAD and DRAD.
• /INTER/TYPE24: Units of friction coefficients for different friction laws is corrected.
• /MONVOL/FVMBAG1: Correction of card input with porous surface.

Resolution issues

• /ADYREL: Improvement of the damping value computation. Model was diverging because the damping was too high.
• /FAIL/ALTER: Correction of the failure behavior with Irate=1. The computation was failing in version 2021.
• /FAIL/GURSON: Correction for the single precision version.
• /FAIL/JOHNSON: Correction of SPMD issue in Starter or Engine with failure model and Ixfem=1 applied on a solid part.
• /H3D output:
  • Correction of the output format for 3D stress tensors. The von Mises value and other scalars were computed with strain data for some specific setting.
  • Deleted spring elements were not set in the eroded element pool.
  • The contact force and pressure value displayed was not correct in the H3D output.
• /INIVOL: Correction of phase initialization for specific models. The initialization was not correct since version 2020.1.
• /LOAD/CENTRI: Correction of the external work computation in cases where a centrifugal load is applied on a rigid body (/RBODY) secondary node only (whether it is applied on the main node or not).
• /MAT/LAW24: The output for /ANIM/BRICK/TENS/STRAIN was overwritten by /ANIM/BRICK/TENS/EPSP (specific output for concrete material LAW24 with I_cap=2).
• /MAT/LAW36:
  • Correction of the internal energy computation after erosion of quadratic tetrahedron elements (/TETRA10).
  • Improvement of the material behavior with VP=1 for specific loadcases (blow molding analysis).
• /MAT/LAW42: Correction of SH3N shell stability with Ogden materials. Specific models were diverging (non-expected element failure).
• /MAT/LAW69: Solid behavior improvement with HEPH formulation (I_solid=24). The model was diverging.
• /MAT/LAW70: Correction of interpolation error where there is only 1 point in the curve.
• /MAT/LAW80: Correction of unstable behavior and non-physical plastic strain output for shell formulations I_shell=24 or I_shell=1.
• /MAT/LAW88: Correction of memory allocation in the Starter (possible segmentation violation).
• /PROP/TSH_*: Correction of tensor output (stress, strain) for thick-shell elements for both the animation and native H3D outputs.
• /RBE3:
  • Improvement of the force distribution in case the reference node is far from the independent nodes.
  • Correction of RBE3 behavior with SPMD/HMPP version. Node position is correctly computed for specific models with many interconnected RBE3.
  • Correction of mass added when dependent node is far away from the independent nodes.
• /SET/GENERAL:
  • Correction for the SET of SET. 3 nodes shell elements (/SH3N) were missing.
  • Memory allocation improvement.
  • Sets defined with /SET_D are taken into account after the key option, ALL.
• /STATE/NODE/VEL: All nodes were output regardless of the /PART selection in /STATE/DT.
• /SUBDOMAIN: Local coordinate system skew_ID of spring property is correctly transferred to the sub-domain.
• /SURF/DSURF: Correction of Starter issue with specific surface definition. The Starter no longer hangs.
• /PARITH/ON: The external forces from /CLOAD, /PLOAD or /LOAD/PFLUID are correctly released after de-activation by sensor.
• The memory usage value reported in Engine listing file is corrected on SPMD win64 version.

New Features

New input file reader

• The new reader is based on the same configuration files used in HyperWorks. This allows faster and better support of all new Radioss features in HyperWorks.
• This new reader solves several issues involving unit system conversion and improved support of entities in submodels.
• Models created in the version 4 format or earlier cannot be read by the new Radioss input file reader. These files can be updated to a newer input format version using HyperMesh or HyperCrash.

New general set option

• New general set (/SET/GENERAL) where any nodes, elements, parts, subsets, boxes, or sets can be added or removed. Options exist to include external or all surfaces.
• This new set can be used with any entity to define a node group, surface, or element group.
• When a set is referenced by a keyword, the entities referenced (nodes, surface, line, or elements) are automatically extracted from the set.

New reader for LS-DYNA input format (Beta version)

• A model in the LS-DYNA input format can be used as input for a Radioss computation (Starter and Engine).
• The LS-DYNA model is read and mapped to equivalent Radioss functionality.
• The number of features and parameters currently supported are detailed in the Reference Guide > LS-DYNA Input.
• Due to the large number of new input options, this first release of the reader is a beta version.

ALE grid control (/ALE/GRID/*)

• New grid control /ALE/GRID/LAPLACIAN based on Laplacian smoothing method.
• New grid control /ALE/GRID/VOLUME based on volume. Each ALE node position is computed as the average position of the centroids of the elements to which it is connected. The volume of the elements is used to weight the average positions.

Boundary conditions

• New cyclic boundary option /BCS/CYCLIC to model a section of a rotary machine, such as a turbine engine. The cyclic boundary is applied on each face of the cyclic section. This option is used with static conditions where the equivalent centrifugal force is applied with a specific load (/LOAD/CENTRI).

Element and property

• For solid and thick shell properties, the flags I_strain and I_hkt are now automatically defined so they have been removed from the input deck. The flags I_smstr, I_cpre, and I_frame can be automatically defined by Radioss based on the element type and material by using the new input value -1 in the property or -2 in /DEF_SOLID.
• Elastic-plastic material /MAT/LAW44 can be assigned to beam element /PROP/TYPE3, /PROP/TYPE18 and truss element /PROP/TRUSS.

Materials and failure models

• New failure model based on Mullins Ogden-Roxburgh model (/FAIL/ MULLINS_OR) compatible with /MAT/LAW92, /MAT/LAW95, and /MAT/LAW100. This failure model simulates viscous elastic behavior with stress reduction.
• New elastic-plastic material law for high tensile strength steel and damage model (/MAT/LAW104) with non-local regularization method (/FAIL/GURSON).
• New elastic-viscous-plastic model for polymer materials (/MAT/LAW101).

Result output

• New plastic strain output results for any integrations point of the integrated beam element (/PROP/TYPE18) in the animation files (/ANIM/BEAM/EPSP) and H3D files (/H3D/BEAM/EPSP).
• New engineering total strain tensor output for shell and solid elements in .h3d file (/H3D/SHELL/TENS/STRAIN_ENG, /H3D/SOLID/TENS/STRAIN_ENG).
• New output stress or strain tensor on the external skin of the solid part in .h3d file (/H3D/SOLID/TENS/STRESS/OUTER, /H3D/SOLID/TENS/STRAIN/OUTER). An external skin is automatically created by Radioss to display the results. This output is useful to post-process Forming Limit Diagrams during the stamping process.
• FLD damage factor indicator and FLD failure zone factor are extended to the outer surface of the thick shell and solid element in the .h3d file (/H3D/SOLID/FLDZ/OUTER, /H3D/SOLID/FLDF/OUTER).

Altair Compute Console

• The HyperWorks Run Manager was replaced with an updated utility named Altair Compute Console (ACC).
• Radioss can now be started by using the Compute Console shortcut in the menu which replaces the previous Radioss shortcut.
• The Compute Console is the easiest way to launch Radioss on a local host or submit a simple job to a remote Linux server/cluster or PBS system.

ARM processor

• Radioss is now available on ARM64 machines using the Linux operating system.

Enhancements

Airbag

• New airbag input card /MONVOL/FVMBAG2 with the same advanced features as /MONVOL/FVMBAG1 and a simpler input.
• The finite volume is meshed using HyperMesh tetrahedron mesher when using kmesh = 12 or kmesh = 14 for the FVM bags in /MONVOL/FVMBAG1.
• A new option in /MONVOL/PRES to input the pressure is a function of the relative volume (V/V0) with the flag Itypfun = 2 and a function of time multiplied by relative volume (V0/V) with Itypfun = 3.

ALE options

• Improvement of the ALE grid formulations (/ALE/GRID/*) with linear tetrahedron element (/TETRA4).
• Volume fractions can be initialized with 1D initial mapping /INIMAP1D and with 2D initial mapping /INIMAP2D.
• Unit system compatibility is added for the boundary material /MAT/LAW11.

Contact interface

• Improvement of computation stability for models with Advanced Mass Scaling (/AMS) and tied contact (/INTER/TYPE2) with Spot_flag=27.
• A new feature for the thermal conduction and radiation in the contact interface for forming application (/INTER/TYPE21). The thermal conduction continues with a user-defined decay factor when there is no more contact and within a user-defined distance.
• New contact stiffness options, I_sft=12, 13, 14 for the contact force resolution based on the Nitsche’s method in contact interface /INTER/TYPE24. This method uses the element stress state to adjust the contact stiffness.
• Edge to Edge contact was added in the contact interface /INTER/TYPE25. The friction is not yet available for the edge to edge contact.
• New option I_tied in contact interface /INTER/TYPE7 to tie a secondary node when its time step becomes smaller than a defined time step value (dtmin). This option helps reduce the mass increase during a computation.

Element and property

• A local coordinate system can be defined in the spring element (/SPRING). This option can be used for general spring (/PROP/TYPE23 and /MAT/LAW108).

Material and failure models

• Reduction of the memory used for the user variables in the material laws. The restart file size is also reduced.
• Correction of spring element behavior for I_equil=1 for the spring material /MAT/LAW108.
• Correction of time history output concerning Inertia, kinetic energy, and CoG of spring elements with spring material /MAT/LAW108.
• For better computation stability especially when using the single-precision version, the maximum default values are changed from 10³⁰ to 10²⁰ in several material laws. This change should not affect the results of the current models. The input is updated automatically when values larger than 10²⁰ are set in the model.
• The yield surface can be defined using a /FUNCT in material /MAT/LAW44 resulting in different behavior in combination with the definition of the analytical yield VP.
• New error message when the void volume fraction does not respect the following rule: f_I < f_c < f_F in the Gurson material /MAT/LAW52.
• Starter improvement to display warning and message when functions or parameters are missing in the fabric material /MAT/LAW58.
• New yield surface option with Barlat 3 parameter plane stress in the Yoshida material /MAT/LAW78.
• Phase transformation is now available during the heating process in the material /MATLAW80.
• New option to define the elastic shear modulus G in the connection material /MAT/LAW83, independently from the elastic Young's modulus.

Starter messages

• New Starter error message when the /SHELL element is used in a 2D analysis (N2D3D=1,2), instead of /QUAD.
• New Starter error message when the /SH3N element is used in a 2D analysis (N2D3D=1,2), instead of /TRIA.
• New test to check to ensure that enough memory is available before starting the computation using the /BEM/DAA feature.
• A warning message is displayed when a /HEAT/MAT card is used with an Eulerian or ALE material with the I_form=1 Lagrangian formulation. The flag is automatically switched to 0 ALE formulation.
• A warning message is displayed when /INITEMP or /IMPTEMP are used, and ALE or EULER materials are present in the model.
• A new error message is output when the /THERM_STRESS option is used with an ALE or EULER material.
• New error message when an element defined in a model refers to a part (/PART) that does not exist in the model.
• New warning message when the section force /SECT with cut methodology is defined in a submodel //SUBMODEL with offset. The offset is not applied when reading the SC01 file.

Result output

• Schlieren now output with 2D and staggered scheme using /H3D/ELEM/SCHLIEREN or /ANIM/ELEM/SCHLIEREN.
• The contact energy is output as elastic contact energy, frictional energy, and damping energy (for some contacts) to both the /TH/INTER and global variables when the Engine option /TH/VERS = 2021 is defined.
• Correction of the time history output for subset and parts for the outputs, center of gravity, momentum, and inertia (/TH/PART and (/TH/SUBS).
• The center of gravity of an SPH PART is now output in the time history file (/TH/PART).
• The generalized stress variable F1, F2, F12, Q1, and Q2 for shell elements are renamed as "STRESS", instead of "FORCE" (/TH/SHELL).

Other enhancements

• /FRAME/FIX now supports a local unit system.
• Simplification of the /GRAV input. By default, gravity is applied to all nodes using a constant value defined using the scale factor flag.
• Performance optimization of time history output (TH file).
• Improvement of the unit management with single precision. The Starter was failing with for ID greater than 8 million.

Resolved Issues

Airbag

• Improvement of the submodel (//SUBMODEL) compatibility for the airbag /MONVOL/AIRBAG1.

ALE options

• Correction of various issues for the detonator’s options (/DFS/DET*).
• Improvement of result mapping from 2D to 3D model for materials with an explosive.
• Correction of unit conversion issue for the initial velocity option (/INIVEL/GRID, /INIVEL/T+G).
• Improvement of the fluid and structure coupling with contact interface /INTER/TYPE18 and with multi-fluid material /MAT/LAW151.
• Starter issue correction when /EULER/MAT is used on sub-material of material /MAT/LAW151.
• Improvement for the handling of pressure shift option (P_sh) with material /MAT/LAW151 with I_form=12. A new warning message is displayed when the pressure shift value is different in the sub-materials.

Boundary conditions

• Correction and update of the boundary condition (/BCS/LAGMUL) and rigid body (/RBODY/LAGMUL) with the Lagrangian method. The behavior was not correct.
• Correction of the rigid body (/RBODY) behavior in the Radioss SPMD version when /FUNCT_SMOOTH used with imposed displacement is defined on the main node.

Contact interface

• The tied contact (/INTER/TYPE2, Spot_flag=27,28) will switch automatically to penalty formulation when a secondary node is defined in /IMPDISP, /IMPVEL, /IMPACC or constrained with cut approach (/SECTION with I_sva=100,101).
• Improvement of the model stability with SPMD and the thermal option I_the=2 with contact /INTER/TYPE21. A specific model was failing.
• Correction of a numerical issue in the interface /INTER/TYPE21 and thermal conduction option in the HMPP parallel version.

Imposed conditions / loadcase

• Correction of the centrifugal load (/LOAD/CENTRI) applied on a structure using a non-constant rotational velocity and local coordinate system.
• The heat transfer coefficient in /CONVEC was not converted into the right working unit system.
• The option /IMPDISP/FGEO is now compatible with submodel (//SUBMODEL).
• Several corrections to the /IMPFLUX option for unit system conversion and submodel compatibility.
• Several corrections on the /LOAD/PFLUID option for unit system conversion and submodel compatibility.
• Improvement of the bolt preloading (/PRELOAD) behavior for large global rotations. The preloading force was not constant. There are still some issues with this option with the single-precision version.

Element property

• The unit of DT_min was not correctly defined and initialized in the orthotropic thick shell property (/PROP/TYPE21).
• The numerical damping parameter d_n was not used for the QBAT and DKT18 shell formulations in /PROP/SHELL.
• Correction of the kinetic energy output for a solid part with /TETRA10 elements and the formulation I_tetra10=2.
• The middle node of the quadratic tetrahedron element (/TETRA10) with the formulation I_tetra10=2 can be defined in an RBE2 element (partial dof).
• Correction of an instability issue of 3 node shell element /SH3N with the option I_sh3n < 4 and I_drill=1 in /PROP/SHELL.
• Correction of numerical error of solid elements (/PROP/SOLID) with I_smstr=10 and elastic material /MAT/LAW1.
• Modification of the Navier-Stokes viscosity behavior in solid properties /PROP/TYPE14 and /PROP/TYPE6. The behavior has been changed to better compute the critical damping. Also, the time step computation has been updated.
• Correction of unit conversion for the axisymmetric spring property (/PROP/TYPE25).
• The curve abscissa scale factor Lscale was not used for the unit conversion in the spring property /PROP/TYPE26.
• Loading and unloading functions defined in the spring property /PROP/TYPE26 were not correctly reported in the Starter output file.
• The parameter h was not correctly taken into account, if the SPH property (/PROP/SPH) was defined in a //SUBMODEL.
• Improvement of the shell behavior with the composite property /PROP/TYPE51 when the material assigned in the part is different than the one used in the plies. The computation was failing or was giving wrong results.
• Membrane damping dm defined in shell property (/PROPERTY/TYPE51) was not taken into account for material /MAT/LAW25. This modification may lead to some differences in the results.

Materials and failure models

• Correction of the flag I_{fail_so}=1 in the failure model /FAIL/SNCONNECT. The solid element was failing only when all integration points reach the failure limit.
• Correction of the failure model /FAIL/BIQUAD for solid elements. The issue may cause too early failure in the tension load.
• Improvement of the material behavior /MAT/LAW36 with VP=1. It was causing non-smooth thickness distribution at the end of a blow molding simulation.
• Correction of the strain rate calculation for /MAT/LAW36 applied to beam elements /PROP/TYPE18.
• Correction of the unit translation of parameter E_inf in /MAT/LAW43.
• The numerical damping parameter d_n defined in the shell property was not taken into account for material /MAT/LAW58.
• Material stability improvements for /MAT/LAW65 with specific parameters and loading conditions.
• Correction of the pressure computation when plastic behavior is reached in material /MAT/LAW72 for solid elements. The computation may become unstable.
• Correction of numerical instability for specific hot forming application in the material /MAT/LAW80. The shell element was diverging.
• Material stability improvement for /MAT/LAW87.
• Improvement of the dynamic behavior for elastic vibrations during the unloading phase or quasi-static loading phase in material /MAT/LAW90.
• Improvement of the material /MAT/LAW94 for quadratic tetrahedron (/TETRA10) elements.

Result output

• Correction of the strain tensor output per integration points for the solid element. The shear strain component was 2 times too high.
• Improvement of the ply angle display when the initial orientation is 0°. The same as elementary material reference orientation. The ply angle was randomly displayed as +/- 180° with the output (/ANIM/SHELL/PHI or /H3D/SHELL/PHI).
• The native .h3d file was corrupted and not readable when a subset (/SUBSET) did not have any title or was a blank line. A default title is automatically added to the subset card.
• Correction of a numerical issue when NPT=ALL was requested on a model defined with composite shell properties (/H3D/SHELL/*). The keyword was rejected by the Engine.
• Improvement of the stress and strain tensors output for the composite thick shell property (/PROP/TYPE22), both for animation and H3D files.
• Correction of the time history output for the part and subset of quadratic tetrahedron elements (/TETRA10). The inertia and COG position was wrong in the part output (/TH/PART).

Other corrections

• The checkpoint restart option can now be used with quadratic tetrahedron elements /TETRA10 with I_tetra10=2
• A specific model with rivets (/RIVET) set in time history (/TH) was failing with the SPMD version.
• Multi-domain is now handling correctly /GAUGE and /ACCEL when present in the same input deck.
• Correction of several issues in the sensors (/SENSORS) for the Radioss HMPP version. The results could be wrong depending on the model decomposition.
• Correction of a possible error or core dump of Radioss Starter with the ellipsoid surface (/SURF/ELLIPS).
• Improvement of the cumulative computation time written in the Engine output file for the single precision version in a multiple Engine run. The computation time values were not correctly reported from 1 run to the next one.