New Keywords in 2026

New and modified features in Radioss.

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New Starter Keywords

• /ALE/GRID/LAGRANGE
• /DAMP/FUNCT
• /EOS/COMPACTION_TAB
• /FAIL/COMPOSITE
• /FAIL/LEMAITRE
• /MAT/LAW127 (ENHANCED_COMPOSITE)
• /MAT/LAW133 (GRANULAR)
• /MAT/LAW134 (VISCOUS_FOAM)
• /MAT/LAW163 (CRUSHABLE_FOAM)

Modified Starter Keywords

• /DFS/DETPOINT/NODE and /DFS/DETPOINT/SET - added new Shadow flag, Ishadow
• /FAIL/FLD - added Mode 3: Incremental Strain Ratio Beta ( $\beta$ )
• /INTER/TYPE21 - added new friction identifier, fric_ID
• /LOAD/PBLAST - added new flag, Ishape
• /MAT/LAW90 - added new parameters, Fail, Econt and Tcut
• /MAT/LAW108 (SPR_GENE) and /MAT/LAW113 (SPR_BEAM) - added new value H_i=9
• /PRELOAD - added new identifier, fct_ID
• /PROP/TYPE34 (SPH) - added new parameters I_1D, hmin, hmax and hcst
• /RBE3 - added new flag, Iform

New Engine Keywords

• /ALE/GRID/FLOW-TRACKING
• /ALE/GRID/LAGRANGE
• /ALE/GRID/LAPLACIAN
• /ALE/GRID/VOLUME
• /DEL/PART
• /DEL/PART/1

New LS-DYNA Keywords

• *CONTACT_AUTOMATIC_ONE_WAY_SURFACE_TO_SURFACE
• *DAMPING_FREQUENCY_RANGE_DEFORM
• *DATABASE_NODAL_FORCE_GROUP
• *INTERFACE_SPRINGBACK
• *MAT_062 (VISCOUS_FOAM)
• *MAT_163 (MODIFIED_CRUSHABLE_FOAM)
• *PART_SENSOR

Modified LS-DYNA Keywords

• *BOUNDARY_PRESCRIBED_MOTION - added new OPTION1 = SET_BOX
• *DATABASE_BINARY_D3PLOT - added new flag, NA
• *MAT_105 (DAMAGE_2) - added new failure parameters, EPS_D, S_D, and DC
• *MAT_169 (ARUP_ADHESIVE) - added new parameters, SHRP and SHT_SL