Small Displacement and Large Displacement Nonlinear Quasi-Static Analysis results are now available at incremental load-steps using the NLOUT bulk data entry and the NLOUT subcase information entry. The NINT and SVNONCNV parameters are available to control incremental output.

Finite sliding contact is now available for Surface-to-Surface (S2S) contact to simulate large sliding at the contact interface. Finite sliding is activated by setting the TRACK field on the CONTACT entry to FINITE.

Large displacement support for CROD, CBAR and CBEAM elements is now available. Note that Pin flags (PA and PB fields) for CBAR and CBEAM elements and Torsion for CROD element (J field on PROD entry) are not currently supported. 1D bolt pretensioning is now available for Large Displacement Analysis.

MPC-based Fast Contact is now supported for models where contact between parts is the only source of nonlinearity in the model. MPCs can now be used in conjunction with SUPORT, SPC entries and PARAM,CDITER to activate MPC-based fast contact.

Fast Contact Analysis is now available for Node-to-Surface (N2S) contact and for CGAP/CGAPG elements. This is supported for models without material nonlinearity, or friction. Large displacement nonlinear analysis is not supported. PARAM,FASTCONT can be used to activate CONTACT/CGAP(G)-based fast-contact analysis.

Follower pressures and forces are now supported in Large Displacement Nonlinear Analysis. Pressures and forces are now dependent on the deformation with regard to both direction and area (pressure). The FLLWER bulk data and FLLWER subcase information entries are now available to activate and define parameters to control follower loading. PARAM, FLLWER is also available.

Nonlinear adaptive convergence and time-stepping parameters can now be controlled for Large Displacement Analysis using the NLADAPT bulk data and NLADAPT subcase Entry. The NCUTS, DTMAX, DTMIN, NOPCL, NSTSL, and EXTRA parameters are currently available for nonlinear convergence control.

Time dependent loading for Nonlinear Quasi-Static Analysis is available through the TLOAD1 and TLOAD2 bulk data entries with table data. The DLOAD subcase entry can be used in an NLSTAT subcase to reference TLOAD1/TLOAD2 bulk data entries.

Shell-to-Shell and Shell-to-Solid Element support is now available for Global-Local modeling. Both the local and global models can contain shell elements. They can also be a combination of shell and solid elements.

Acceleration loads can now be applied to models using ACCEL, ACCEL1, and ACCEL2 bulk data entries. The ACCEL bulk data entry can be used to apply acceleration loads based on location. ACCEL1 bulk data entry can be used to apply acceleration loads on specific GRID points by specifying the particular GRID IDs. ACCEL2 can be used to apply acceleration loads to SETs of GRIDs in the model.

Rigid bodies can now be defined as element set, grid set, or surface using the RBODY bulk data entry. MASS and INERTIA continuation lines are also available for mass and inertia properties for the rigid bodies. The RBADD bulk data entry can be used to define a rigid body as a combination of rigid bodies defined by RBODY.

Contact results, including Contact Force (v), Contact Pressure (s), and Contact Traction (v) are now available in the OP2 file using the CONTF bulk data entry.

Contact area output is now available via the CONTF bulk data entry with the OPTI format option. This is supported only for surface to surface (S2S) contact. The contact area results are output to the .cntf file.

Power Spectral Density (PSDF) and Root Mean Square (RMS) element stress, strain, and force results are now available for Random Response Analysis in H3D and OP2 formats for CBEAM and CBAR elements.

STATSUB (BUCKLING/PRELOAD) can now reference small displacement NLSTAT subcases in models containing S2S contact. Previously, only N2S contact and linear static subcase references were supported.

The Arruda-Boyce Model (Model=ABOYCE) is now supported for Hyperelastic materials on the MATHE bulk data entry. Additionally, reduced forms of the Generalized Mooney Rivlin material model (Model=MOONEY) are also separately available via Model= RPOLY/MOOR/NEOH/YEOH options.

The Poisson’s Ratio (NU), Material Density (RHO), Coefficient of thermal expansion (TEXP), and Reference Temperature (TREF) fields have now been added to the MATHE bulk data entry.

The FLAT field on each Table entry (TABLED1-3, TABLEM1-3, TABLES1, TABRND1, and TABDMP1 Bulk Data Entries) can be set to a non-zero value to activate the constant Y-value option.

The projection points GA and GB for CWELD and CGAPG are now available in the OP2 file.

The RIGID I/O Options entry is now available to select the rigid element processing method, LAGRAN (LaGrange multiplier method) or LGELIM (LaGrange multiplier method with constraint elimination). This is applicable to RBAR, RROD, RBE1, RBE2, RBE3, and MPC entries.

Stress and Strain output is now available for CPYRA elements in Static Analysis in the OP2 file.

OUTPUT, SPCD, YES/NO is now available to control the output of .spcd files. The default is YES.

The default value of the tangential stabilization scaling factor with respect to the normal stabilization (TRFAC) on the CNTSTB bulk data entry has now been changed to 0.1.

When CONTPRM, CONTOUT, YES is specified, S2S contact elements (and large displacement N2S contact elements) will be output as PLOTEL+RBE3 into the <filename>_contout.fem file for visualization. This filename_contout.fem file can then be imported into HyperMesh on top of the base model to visualize the S2S contact.

SPC is now allowed on the dependent nodes of RBE3’s for Large Displacement Nonlinear Quasi-Static Analysis.

Dynamic Design Analysis Method (DDAM) is now available.

Threshold-based output of results is now supported. The THRESH (absolute threshold), TOP (top “topn” results), and RTOP (top “rtop” percent of total results) options are now available for Element Strain Energy (ESE), Stress (STRESS) and Temperature (THERMAL) output.

Thermal expansion coefficient (ALPHA) on the RBE2, RBE3, RROD, and RBAR elements can now be specified.

The POST subcase information entry can be used to request subcase-specific output to separate files. The TOFILE, label option can be used to define a label to be appended to the model’s filename in the generated subcase-specific output file. This is currently only supported for OP2 files. POST,TOFILE should always be used in conjunction with OUTPUT,OP2, FORMAT=OP2, or PARAM, POST,-1.

Temperature load output is now available for Static Analysis via the OLOAD bulk data entry. Previously, only applied load vector output was supported.

FORCE results are now output for CBUSH, CELAS elements for Transient Analysis to the H3D, OP2, and PCH files.

RJOINT is now available to connect coincident GRID points by defining a rigid joint connection between them. Depending on the value of the CB field, the behavior of the rigid joint can be switched between hinges, universal joints, spherical joints and so on.

Corner strains are now available for solid elements via the STRAIN(CORNER) entry. The “Corner Data” check box should be activated in HyperView to view corner results.

Grid point strains are now available for solid elements using the GPSTRAIN I/O Options entry. GPSTRAIN is currently only supported for Static Analysis.

Subcase-Specific Random Response Analysis is now available. The results for Frequency Response Analysis and Random Response Analysis can now be decoupled. The ANALYSIS=RANDOM option can be used in a separate Random Response Analysis subcase and corresponding Random Response results can be requested in this separate subcase. The RANOM Subcase Information entry can be defined in this separate subcase pointing to RANDPS and RANDT1 entries.

Axial deformation of GAP elements are now output in the OP2 and PCH files.

Scaling support for the values on the PBUSH entry is available via the PBUSHT entry. The KSCALE, BSCALE, GESCALE, and MSCALE flags are available on the TYPE field to scale the corresponding data (based on frequency) on the PBUSH entry.

MAT9 entry is now supported for Large Displacement Nonlinear Analysis.

The LOCATE entry is now available and RELOC is now subcase specific. The LOCATE entry defines subcase-specific part location within the global-part. LOCATE bulk data entries are activated in each subcase by the LOCATE subcase entries. The LOCATE bulk data entries reference the identification number of a RELOC bulk data entry which defines the actual location of the part in the final model.

Linear bushing elements, via CBUSH and CBUSH1D, are now supported in Large Displacement Nonlinear Analysis. The SPRING continuation line on PBUSH1D is now not mandatory to use linear CBUSH1D elements in Large Dislacement Nonlinear Analysis. Additionally, the TYPE=KN data on the PBUSHT entry is not mandatory to use linear CBUSH elements in Large Displacement Nonlinear Analysis.

Residual Energy Ratio (Epsilon) is now always output in the OUT file. This now does not require the usage of GPFORCE. Epsilon is not available for a Large Displacement Analysis, Linear Gap and Fast Contact Analysis.

Contact friendly elements (PARAM, CONTFEL) are now automatically turned on when applicable within the model. The default is now PARAM, CONTFEL, AUTO if the parameter is not specified in the model. This will activate contact friendly elements when 2nd order elements with N2S contact are present in the model.

PARAM, HGHCMPOK is now available to turn off the check for negative and large compliance in optimization. This will bypass the ERROR in optimization runs even if the compliance is large or negative.

Generalized spring and damper property (PBUSHT) and elastic spring property (PELAST) in the model can now be turned ON/OFF using PARAM, PBUSHT and PARAM, PELAST, respectively.

Subcase-Dependent Large Displacement Quasi-Static Analysis can now made subcase-dependent by using NLPARM(LGDISP) = SID in a specific subcase that selects a corresponding NLPARM bulk data entry.

The exponential and quadratic contact stiffness penalization options are now available on the PCONT entry for Nonlinear Contact Analysis. The STFEXP continuation line can be used to activate the exponential stiffness penalization and the STFQDR continuation line can be used to activate the quadratic stiffness penalization.

Cylindrical coordinate system is supported on the CID field of the GRAV bulk data entry.

Multiaxial Fatigue Analysis is now available. The MAXLFAT field on the FATPARM bulk data entry can be set to YES to activate Multiaxial Fatigue Analysis. The MDMGMDL continuation line can be used to define multiaxial fatigue damage models on the DM1, DM2, and DM3 fields. The MATFAT bulk data entry has now been enhanced with parameters and coefficients for Multiaxial Fatigue Analysis.