What's New

View new features for Radioss 2025.1.

Altair Radioss 2025.1 Release Notes

New Features

New LS-DYNA format reading capabilities

*CONTACT_AUTOMATIC_BEAMS_TO_SURFACE
*DATABASE_PLLYOUT
*DATABASE_TPRINT
*DEFINE_CURVE_SMOOTH
*DEFINE_HEX_SPOTWELD_ASSEMBLY
*ELEMENT_SEATBELT_RETRACTOR
*ELEMENT_SEATBELT_PRETENSIONER
*ELEMENT_SEATBELT_SENSOR
*MAT_122 (HILL_3R)
*MAT_ADD_DAMAGE_GISSMO

Loadcases and contact interfaces

/DAMP/FREQUENCY_RANGE: option to define a constant Rayleigh damping over a range of frequencies on sets of shell and solid element deformation.
/INTER/TYPE2: add surface to surface input treatment in the tied contact.
/SENSOR/PYTHON: new sensor using Python script.
/VISC/PLAS: Frequency independent viscous model with elastic stiffness G and stress limit SIGF parameters.

Material and Failure models

New compaction equation of state /EOS/COMPACTION2 similar to that defined in /MAT/LAW21 (DPRAG).
New modes output in the animation output (/H3D/SOLID/FAILURE, /H3D/SHELL/FAILURE) for the following failure models:
- /FAIL/SPALLING
- /FAIL/FLD
- /FAIL/ORTHSTRAIN
New parameter to model the compacted behavior in the honeycomb material /MAT/LAW50 (VISC_HONEY) with isotropic elastic-plastic material.

Element and properties

Beam orientation can be defined with a vector in the beam element (/BEAM).

Animations and time history output

/H3D/SPH/NEIGHBOURS in .h3d file to display the number of neighbors for SPH elements with property /PROP/TYPE24 (SPH).

Starter and Engine

Engine control option /IMPL/MUMPS/AUTOCORE to switch automatically to out of core memory model when there is not enough memory available (same as /IMPL/MUMPS/OUTCORE).

Enhancements

LS-DYNA format reader

New error message in case function LCSS is defined in the material but does not exist in the model.
*AIRBAG_LINEAR_FLUID: reading improvement in case P_MAX and P_MAX_ID are not defined. Maximum pressure was set to 0.0.
*CONTACT: the option _TITLE is read like the option_ID.
*CONTACT_INTERIOR: contact interior is now activating the element distortion control flag (I_control=1) in the solid property. Result differences are expected for specific case from the previous Radioss version.
*CONTROL_HOURGLASS and *HOURGLASS: Improvement of hourglass control reading.
*CONTROL_UNITS: new error message in case the unit card is not defined in the model, and it is mandatory for entity mapping.
*DEFINE_VECTOR: the vector can now be defined in the local coordinate system skew_ID.
*DEFINE_VECTOR and *DEFINE_VECTOR_NODE: the option _TITLE is now supported.
*INITIAL_VELOCITY_GENERATION: improvement of local coordinate reading.
*LOAD_BODY: Option VX, VY, VZ and VECTOR are now read by Radioss Starter.
*MAT_024 (PIECEWISE_LINEAR_PLASTICITY): reading improvement in case of VP=1 with LOG_INTERPOLATION option.
*MAT_077_O (OGDEN_RUBBER):
- Frequency independent damping (G; SIGF) is now read.
- Better mapping of the LS-DYNA input to the Radioss solution.
*MAT_083 (FU_CHANG_FOAM): the parameter TFLAG is better considered.
*MAT_119 (GENERAL_NONLINEAR_6DOF_DISCRETE_BEAM): reading improvement in case parameter SCOOR=2, or -2 is defined in the *SECTION_BEAM card. The material is now mapped to /MAT/LAW113.

Loadcases and contact interfaces

New Starter error message in case an Element Boundary Condition (/EBCS) is applied on a Lagrangian element.
/INIVEL/AXIS, /INIVEL, /INIVEL/FVM: new option to define the starting time from defined value or sensor (/SENSOR).
/INIVOL:
- Sorted node group (/GRNODE/NODENS) can be used for the initial volume definition in 2D analysis.
- Improvement of the Starter computation time for the initial volume computation for 2D analysis when the cut surface is defined with segments.
- After execution of all /INIVOL options; the unoccupied sub-volume is now automatically filled with the prevalent phase (FILL_RATIO>0.9). It was filled with phase 1 in the previous version.
Reference metric (/XREF, /EREF, /REFSTA) can be used for solid elements and elastic material (/MAT/LAW1).

Material and Failure models

External work from the equation of state /EOS/GRUNEISEN is now included in the total external work time history output.
/EOS/COMPACTION: new check for the unloading modulus to avoid unrealistic behavior and model instability.
/EOS/GRUNEISEN: new pressure shift (PSH) and initial pressure (P0) parameters.
/FAIL/TAB2: new parameter VOLFRAC for damaged volume fraction to be reached before the element is deleted (fully-integrated and higher order solid elements only).
/MAT/LAW51 (MULTIMAT): material /MAT/LAW2 can be added in the multi material model (I_form=12).
/MAT/LAW57 (BARLAT3): the material law has been completely revised with new and better algorithms and is much faster. Some small differences in the results are expected from previous versions.
/MAT/LAW81:
- Scale factor function for the cohesion, ‘c’ can be dependent on the volumetric plastic strain parameter $ε_{v}^{p}$ or deviatoric plastic strain $ε_{e q}^{p}$ using a new flag.
- Correction of the von Mises stress output for specific model and loadcase.
- The equivalent stress is not available in the animation files.
/MAT/LAW87 (BARLAT2000):
- New option to enable simple kinematic hardening (Prager-Ziegler model).
- Yield stress defined from input curves.
/MAT/LAW88:
- The error message when compression strain is defined with a value smaller than -1 is changed to warning.
- Enhancement for the unloading behavior and definition with the flag Tension for an improved and more stable behavior.
/MAT/LAW126 (JOHNSON_HOLMQUIST_CONCRETE): new IFAILSO parameter to control post-failure behavior.

Element and properties

The following failure models can be used for beam elements (/PROP/TYPE3, /PROP/TYPE18):
- /FAIL/GENE1
- /FAIL/INIEVO
- /FAIL/TAB2
- /FAIL/VISUAL
New parameter FAILIP in the following failure models to select the ratio of number of integration points for element deletion of the integrated beam element (/PROP/TYPE18):
- /FAIL/BIQUAD
- /FAIL/COCKROFT
- /FAIL/GENE1
- /FAIL/ENERGY
- /FAIL/INIEVO
- /FAIL/JOHNSON
- /FAIL/TAB2
- /FAIL/TENSSTRAIN
/PROP/TYPE14 (SOLID):
- Element distortion control enhancement to reduce non-physical element deformation under specific loading.
- Behavior improvement of the solid formulation I_solid=5 by adding damping for the hourglass modes and in case of element deletion.
- Correction of viscous parameters q_a and q_b for improved stability and formulation consistency for any solid element. The results may be slightly different from previous versions.
/PROP/TYPE20 (TSHELL): the stress and strain tensors were missing for some integration points in the .h3d file for components with elastic material (/MAT/LAW1).
New flag Icontrol to activate the element distortion control for each part in the thick-shell properties (/PROP/TYPE20, /PROP/TYPE21, /PROP/TYPE22).

Animations and time history output

/H3D/ELEM/ORTHD: the keyword "THETA" is replaced by "TETA" to be compatible with HyperView (for the system review panel).
Volumetric strain can be output in the animation file (/H3D/SOLID/VSTRAIN, /ANIM/BRIC/VSTRAIN) and time history (/TH/BRIC) for each phase of the multi-materials /MAT/LAW20, /MAT/LAW37, /MAT/LAW51 and /MAT/LAW151.
Warning message instead of an error message in case an entity is defined in the time history output (/TH/…) but does not exist in the model.
Plastic work WPLA from composite material /MAT/LAW25 can be output in time history for each solid element (/TH/BRIC).
All entities are automatically defined in the time history output with the Obj_ID=0 for:
- /TH/ACCEL
- /TH/GAUGE
- /TH/INTER
- /TH/MONVOL
- /TH/PART
- /TH/RBODY
- /TH/SECTIO
- /TH/SENSOR
- /TH/SUBS
/TH/SURF:
- New possibility to output pressure, mass-flow and fluid velocity through a surface of /EBCS/INLET, /EBCS/FLUXOUT, /EBCS/NRF and internal surface of ALE/EULER domain defined with /SURF/SEG.
- The pressure is now averaged proportionally to the surface area of the element. It gives better pressure estimation in case of non-uniform mesh.

Starter and Engine

/MADYMO/EXFEM: composite properties /PROP/TYPE51, /PROP/TYPE17 and /PCOMPP can be used with Madymo coupling.
Stacksize memory usage reduction in the Starter and Engine.
Parallel arithmetic to ensure the same numerical results whatever the number of processors is deactivated by default with the LS-DYNA input. The computation time will be reduced. (Parallel Arithmetic may be re-enabled via *CONTROL_PARALLEL card with flag CONST = 2).

Resolved Issues

LS-DYNA input format

*AIRBAG_SIMPLE_AIRBAG_MODEL: the set ID is not correctly updated in case the *SET ID is renumbered internally.
*BOUNDARY_PRESCRIBED_MOTION: reading correction in case the field VAD is empty.
*BOUNDARY_PRESCRIBED_MOTION_RIGID_ID: the orientation vector was not correctly read with DOF=4.
*CONTACT: correction of mapping for parameters SST and MST (optional contact thickness).
*CONTACT_AUTOMATIC_SINGLE_SURFACE: the contact with option TITLE was not correctly read.
*CONTROL_TIMESTEP: correction of maximum time step reading (LCTM).
*ELEMENT_BEAM_ORIENTATION: correction of orientation mapping to Radioss.
*ELEMENT_SEATBELT: the local coordinate system Skew_ID was not correctly read.
*ELEMENT_SEATBELT_SLIPRING: the parameter Ltime was not correctly read.
*LOAD_SEGMENT_SET: correction of the default value reading for scale factor Fscale_y.
*MAT_032 (LAMINATED_GLASS): default number of integration points (F1 to F32 in the section shell) was not correctly considered.
*MAT_119 (GENERAL_NONLINEAR_6DOF_DISCRETE_BEAM): reading correction in case IUNLD=1 and unloading curve is not defined. Starter was printing an error.
*MAT_183 (SIMPLIFIED_RUBBER_WITH_DAMAGE): reading improvement in case Length, Wide and Thick are defined.
*SET_PART_LIST: this set was not converted correctly in case of truss components (standalone version only).
*SET_SEGMENT: segment from quadratic tetrahedron element was not correctly read.

Loadcases and contact interfaces

/CONVEC: wrong behavior for ordinate scale factor Fscale temperature in infinite room function fct_ID_T.
/FRICTION and /INTER: the friction parameters C₁ and Fric for I_fric=4 were reversed in the friction value computation.
/H3D/NODA/CSE_FRIC: results were missing.
/IMPDISP: correction of the printed information of the error message (ERROR ID: 120) in case function is missing for the imposed displacement.
/INIVEL: issue correction with initial velocity defined with T_start or sensor and several Engine files.
/INTER/TYPE25: some contacts with quadratic tetrahedrons were not correctly detected on specific models.
/INTER/TYPE7, /INTER/TYPE19: correction of memory allocation issue for specific model.
/MASS/RESET: improvement of the mass reset feature for specific case.
/PRELOAD/AXIAL: correction of wrong behavior with /PROP/TYPE18 on a specific model.
/SET/GENERAL:
- Issue to recover the edge in the contact interface /INTER/TYPE19 when the surfaces are defined by set (/SET).
- Correction of the surface creation in case a coating shell of a solid part is removed from the set (using optional key suffix "D").
- Reading correction where the key NODE_D is defined in the set. The nodes were not correctly removed.
- Improvement of the edge defined with set, shell elements and PART_E.
- The information about the node set defined with /SET was not correctly transferred to the Engine.
- Correction of the option SET_D behavior. The entities were not correctly removed.
/STATE/BRICK: the flag I_solid=5 is now correctly written in /INIBRI cards of the .sta file.
/SUBDOMAIN: correction of contact interface /INTER/TYPE25 behavior in case the secondary node set is defined with a node group

Material and Failure models

/ALE: correction of instability issues when there are linear tetrahedron elements (/TETRA4) with I_tetra4=3 and ALE solid elements in the same model.
/FAIL/FLD:
- Radioss Engine was failing for specific models since version 2025.
- Wrong initialization of strain type (I_smstr) in failure criteria reading.
/MAT/LAW4: improvement of thermal behavior for the elastic-plastic material laws.
/MAT/LAW21 (DPRAG): correction of the unloading behavior. There was a slope change when $μ$ < 0 along the unloading path.
/MAT/LAW81: update and correction of the user variable USRi.
/MAT/LAW108 (SPR_GENE), /MAT/LAW113 (SPR_BEAM): wrong computation in the rotational degree of freedom during the unloading phase for unloading behavior defined by curve.
/MAT/LAW119 (SH_SEATBELT):
- Improvement of the spring creation for specific modeling.
- Correction of the Starter ERROR message #1716 title.
- There is no longer an error in the case a seatbelt with spring element (/MAT/LAW114) is connected to a shell seatbelt (/MAT/LAW119).
/MAT/LAW126 (JOHNSON_HOLMQUIST_CONCRETE): improvement of the material law in case of cyclic pressure load.
/MAT/USERij (USER):
- Plastic strain output was reset to 0 for some integration points.
- It was no longer possible to use I_smstr=10 with shell element and user material law.

Element and properties

The membrane damping default value for QEPH shell element (I_shell=24) was set to dm=0.0 instead of dm=0.015 for the material laws /MAT/LAW1, /MAT/LAW2 and /MAT/LAW22. Results from previous versions may change, element stability is improved.
/PROP/SH_ORTH: the local coordinate system Skew_ID was not correctly read.
/PROP/SPR_PRE: Correction of the Starter output in case only the time function is defined.
/PROP/TYPE14 (SOLID): Correction of automatic I_smstr (I_smstr = -1) assignment for specific model with solid element and failure model (/FAIL).
/RETRACTOR/SPRING: Behavior improvement to get more physical results.
/SLIPRING/SHELL: The elements in the slipring are no longer removed from the contact interface defined with I_del > 0.
/SLIPRING/SPRING: Correction of slipring behavior with nonlinear elastic material and for locking behavior.

Animations and time history output

Tensors for integration points 2 to 4 output are missing in the animation files for quadratic tetrahedron elements:
Improvement of the internal energy output in animation file (/ANIM/BEAM/ENER, /H3D/BEAM/ENER) of the beam element (/PROP/TYPE3).
Correction of the element type in native .h3d output file to be more compatible with the input deck (_0000.rad) file for 4-node shell elements.
Detonation time output (/H3D/ELEM/TDET) was not output with 3-node 2D solid elements (/TRIA).
Maximum stress values /H3D/NODA/GPS/TMAX could decrease during the simulation for specific models.
Only the first integration point was output for the tensor (/ANIM/BRICK/TENS/*/ALL) of the quadratic tetrahedron element (/TETRA10).

Starter and Engine

/MADYMO: Madymo coupling was non-functional since version 2024 because of compilation process change.
Correction of model decomposition for specific model, with small rigid bodies (/RBODY) linked to the middle node of quadratic tetrahedron element (/TETRA10).

Altair Radioss 2025 Release Notes

Highlights

Continuous development for the LS-DYNA format reader.
First option /FUNCT_PYTHON where Python script can define function values.
Option to control solid element distortion (I_control=1) to improve solid element stability and avoid negative volumes.
Improvement of rigid body (/RBODY) stability. This modification may lead to some small differences from previous versions.
New table sorting feature for large tables.

New Features

LS-DYNA Format Reader

Additional LS-DYNA format reading capabilities

*CONTROL_HOURGLASS
*INITIAL_STRESS_SOLID
*MAT_ADD_THERMAL_EXPANSION
*MAT_005 (SOIL_AND_FOAM)
*MAT_073 (LOW_DENSITY_VISCOUS_FOAM)
*MAT_111 (JOHNSON_HOLMQUIST_CONCRETE)
*MAT_169 (ARUP_ADHESIVE)
*MAT_183 (MAT_SIMPLIFIED_RUBBER_WITH_DAMAGE)

Loadcase and Contact Interface

/DFS/DETPOINT/SET: option to define detonation points applied on a set of nodes (/SET or /GRNOD).
/FUNCT_PYTHON: new possibility to get the current time and time step in a Python script.
State output (/STATE/SPHCEL/FULL) and input (/INISPHCEL/FULL) to initialize Smooth Particle Hydrodynamics.

Material and Failure Models

/MAT/LAW169 (ARUP_ADHESIVE): new material law for adhesive material law to simulate adhesive with ability to take into account both cohesive and damage behavior, tailored for materials that exhibit a mix of elastic, plastic, and brittle failure characteristics (for solids).

Enhancements

LS-DYNA Format Reader

*DATABASE_HISTORY_{OPTION}_SET: keyword reading improvement for all input types.
*DATABASE_HISTORY_BEAM: specific beam element type was missing in the time history file.
*DEFINE_COORDINATE_NODES: reading improvement and corrections
*MAT_002 (ORTHOTROPIC_ELASTIC): this material is now mapped to /MATLAW93 for better accuracy.
*MAT_009 (NULL): null material *MAT_NULL with *EOS was not correctly read.
*MAT_077_O (OGDEN_RUBBER): the number of material parameter pairs is extended from 5 to 8.
*MAT_181 (SIMPLIFIED_RUBBER/FOAM): improvement of the material reading and mapping.
*SECTION_SHELL: reading improvement in case NIP > 10.
*SET_PART_ADD: correction of set reading in case a set type has the same identifier.
*SET_PART_LIST: nodes from SPH elements were not included in the set.

Loadcases and Contact Interfaces

/CLOAD, /PLOAD: the concentrated load and pressure load can be a function of node displacement or velocity.
/INIVEL/AXIS, /INIVEL, /INIVEL/FVM: new option to define the starting time; from defined value or sensor (/SENSOR).
/INIVOL:
- New option ICUMU = -1 defines subtractive input of volume fraction. The current surface is used to fill the element and if sum of ratio is greater than 1, then it is subtracted from the previous initial volume setting.
- After all execution of initial volume options, the unoccupied sub-volume is now automatically filled with the prevalent phase (VFRAC > 0.9). It was filled with phase 1 in the previous version.
- Compatible with 2D solid elements for axisymmetric and plane strain analysis.
/INTER/TYPE1:
- Error message added in the Starter in case of incompatible boundary condition in the Starter.
- Additional check in the Starter for the tied FSI contact to verify if the main side is defined in Lagrangian domain and the secondary side in the ALE domain.
- Global improvement in the search algorithm of the fluid versus structure tied contact
/INTER/TYPE2:
- Modification of the output to consider the loading direction and display positive value in tensile and negative value in compression.
- Some corrections have also been made for the contact force outputs. The results will be different from the previous version.
/INTER/TYPE24, /INTER/TYPE25:
- New warning message in case INACTI flag is set to a non-expected value. The flag INACTI is reset to default value.
- Correction of Starter segmentation violation when /INTER/SUB is used.
/INTER/TYPE7, /INTER/TYPE11:
- Improvement of the behavior of Irem_gap=2 with I_gap=3. Some contacts were not correctly removed.

Material and Failure Models

/FAIL: failure model ID of the deleted/ruptured element is now printed in the Engine output file.
/FAIL/FLD: new failure model based on Forming Limit Diagram which handles nonlinear strain paths. This failure model is used in sheet metal forming.
/FAIL/GENE1: improvement of the compatibility between parameter dtmin and constant nodal time step (/DT/NODA/CST).
/FAIL/JOHNSON: new failure options I_{fail_so}=3 and I_{fail_so}=4 for solid element dedicated for ballistic or high-speed impact applications.
/MAT/LAW1, /MAT/LAW42, /MAT/LAW62, /MAT/LAW69: increased contact stiffness in case the element distortion control is activated.
/MAT/LAW2 is now compatible with all Equation of State (/EOS).
/MAT/LAW36 is now compatible with Equation of State (/EOS).
/MAT/LAW42: new capability to define up to 10 shear hyper elastic moduli and material exponents.
/VISC: viscosity models can now be used for any material laws compatible with shell elements.

Element and Properties

/PROP/SOLID, /PROP/SO_ORTH, /DEF_SOLID: new flag I_control=1 to activate the solid element distortion control and internal contact in the solid element to avoid negative volume.

Animations and Time History Output

/TH/SURF: new output for the pressure, mass flow and fluid velocity through a surface coming from Element Boundary Condition /EBCS/INLET, /EBCS/FLUXOUT, /EBCS/NRF and internal surface of ALE/EULER domain defined with /SURF/SEG.

Starter and Engine

Update and improvement of the stacksize setting.
New option -python to explicitly authorize usage of Python script in Radioss.

Verification Models

New verification problem for failure model /FAIL/BIQUAD (RD-V: 0710)
Update to the fabric material verification problem (RD-V: 0230)

Resolved Issues

LS-DYNA Input Format

*CONSTRAINED_INTERPOLATION: element stability issue with large time step.
*CONTACT: mapping for the parameters SST and MST (optional contact thickness).
*CONTACT_AUTOMATIC: reading correction if SOFT=2.
*DEFINE_COORDINATE_NODES: reading correction if dir=Y. The coordinate system was not well oriented.
*DEFINE_TRANSFORMATION: reading improvement if the transformation type is not recognized or valid.
*ELEMENT_DISCRETE: reader improvement if there is no local coordinate system (*DEFINE_SD_ORIENTATION) defined in the discrete element.
*INITIAL_VELOCITY: node set that are exempted from the initial velocities (Exset_ID) is now correctly read.
*MAT_015 (JOHNSON_COOK): reading correction if E=0.
*SET: reading correction for the empty set (*SET).

Loadcases and Contact Interfaces

/ALE/GRID/FLOW-TRACKING: behavior improvement in case of rotational transformation (/TRANSFORM/ROT).
/ALE/MAT, /EULER/MAT: correction of communication issue for ALE or Euler material formulation with SPMD; HMPP version and for specific model.
/EBCS/INLET: compatible with //SUBMODEL
/INIVOL: incorrect initialization with specific model with /MAT/LAW151 and linear tetrahedron (/TETRA4)
/INTER/TYPE1: ALE tied interface is now compatible with 2D analysis.
/INTER/TYPE21: correction of contact interface checking, incorrect minimum contact gap value was printed in the Starter output file.
/INTER/TYPE24, /INTER/TYPE25: memory allocation issue which leads to a segmentation fault in the Engine restart when the output option /H3D/NODA/CSE_FRIC was used.
/INTER: improvements and corrections of the contact interface surface update in case of element failure.
/RBODY: stability improvement of the rigid body with 2 secondary nodes in case of high rotational velocity.
/RETRACTOR/SPRING:
- Improvement of the seatbelt behavior if only fct_ID₁ is defined with a null or negative slope.
- New error message if only fct_ID₁ and fct_D₂ are defined and have a null or negative slope.
/RWALL: memory allocation issue.
/SECT/PARAL:
- Reading for /SECT/PARAL with specific model.
- Correction of warning message for the section forces when the preload option (/PRELOAD) is used in the model.
/SET/GENERAL:
- Surface build corrections and improvement.
- Correction for the 2D surface defined with segments.
- Reading improvement for the SPH elements.
- One attribute was missing for the set of nodes with the key NODENS.
- Issue with surface building for 3 node shell elements (/SH3N) with adaptive meshing (/ADMESH).
- The nodes from SPH defined by parts were not correctly extracted from the general set.
- Reading correction for the set used in the drawbeads contact /INTER/TYPE8.
/SKEW, /FRAME: reading correction in case the reference direction is written with a lower-case letter.
/SLIPRING/SHELL: correction of animation file output for specific model computed with SPMD/HMPP version.

Material and Failure Models

/FAIL/FRACTAL_DAMAGE: initialization may be wrong with SPMD/HMPP version in win64 platform.
/MAT/LAW2: improvement of the thermal behavior for the elastic-plastic material laws.
/MAT/LAW25: correction of wrong behavior for tensile plastic damage in direction 1 with solid elements
/MAT/LAW83: strain rate was not correctly computed for F_smooth=1 and specific model. Strain rate value was also not output in solid element time history.
/MATLAW58, /MAT/LAW19: reading improvement for the single precision version.
/MAT/LAW62: stability improvement for specific loadcase.
/MAT/LAW76: correction of Radioss Engine for specific model.
/NONLOCAL/MAT:
- Improvement of the post-failure behavior of non-local elements.
- Correction of parallel arithmetic behavior with non-local failure formulation.

Element and Properties

/PROP/TYPE29 (USER): memory allocation correction for the UVAR buffer for the user property interface.
/PROP/TYPE3 (BEAM):
- Correction of memory allocation issue if there is a failure model defined for the material used in the beam.
- Starter no longer fails when material with failure model (/FAIL) is defined on the material set on a beam.
.
/PROP/TYPE45 (KJOINT2):
- The joint main direction is defined from node N1 and N2 in case Skew_ID₁ and Skew_ID₂ are defined.
- This modification may lead to some results differences compared to previous versions from specific models.
/PROP/TYPE1 (SHELL), /PROP/TYPE9 (SH_ORTH), /PROP/TYPE10 (SH_COMP): flag I_pos is added in all shell properties to model shell offset from the mid plane.

Animations and Time History Output

/ANIM/BRICK/TENS, /H3D/SOLID/TENS: all integration points are now output in the animation file (/ANIM) and the native .h3d file (/HD3) for the linear tetrahedron with I_tetra4=1.
/H3D/BEAM/TENS/STRESS, /H3D/BEAM/TENS/STRAIN: memory allocation correction.
/H3D/QUAD: correction of vector output for the 2D solid element.
/H3D/SHELL corrections:
- "Erosion status (s)" output.
- /H3D/SHELL/DAMA output for /MAT/LAW25.
- /H3D/SHELL/TENS/STRESS output. Some unexpected PLY was output.
- /H3D/SHELL/FAIL output.
- /H3D/SHELL/FAILURE/* for specific case.
/H3D/SPRING/FORC, /H3D/BEAM/FORC, /H3D/TRUSS/FORC: the 1D element force and moment writing in the .h3d file is now readable.
/H3D/NODA/GPS/TMAX, /H3D/NODA/GPSTRAIN/TMAX: maximum stress values could decrease according to time for specific models.
/TFILE, /ABF: time history data for the parts were missing in case a non-existing part is set in the /TH/PART card.

Starter and Engine

Radioss Starter no longer fails with the option -output=[path] if the length of Starter output file name with the full path is longer than 100 characters.
/DT/NODA/CST: parameter initial_mass_ratio is now correctly considered for multiple runs.