HyperWorks 12.0 Release Notes

Enhanced Bulk Data Entries
• PRETENS: Data to define the location, direction, and type of pretension for 3D bolts was added
• PBUSH: The RCV continuation line has been added to specify stress and strain recovery
coefficients for the CBUSH
• PCONT: The CLEARANCE item in the PCONT data can be used to specify an initial clearance
between the master and slave contact surfaces. This does not depend on the actual distance
between the surfaces.
• XSHLPRM: The data IDRIL has been added in order to turn off the drilling stiffness of shell
elements for nonlinear analysis types NLGEOM, IMPDYN, and EXPDYN. The default value is 1 (ON)
for NLGEOM and IMPDYN SUBCASES.
• PCOMP/PCOMPG/STACK: There is a new laminate option (LAM) for smeared laminates. If the
elements are offset (Z0 not equal to one half of the lay-up thickness), use the new laminate option
SMEARZ0.
• MATS1: The MATS1 data now allows specification of Kinematic and/or Mixed Hardening rules
through expanded options for the HR data.
• DRAPE: Integer values for T and THETA are now read in correctly as real values.
• NLPARMX: Added options to control small displacement assumption, spring back analysis and
fixed time points.
• PBUSHT: The TYPE KN has been added to define the nonlinear force vs. deflection curve for
nonlinear springs.
• CBUSH1D/PBUSH1D: Support of the nonlinear 1D bushing element is now available for nonlinear
static (NLSTAT) analysis. In previous version, the CBUSH1D element was treated as a linear
element during NLSTAT analysis.
• XSTEP: The maximum number of iterations (NITER) and output frequency (NPAMS) for the
conjugate gradient have been added.
Resolved Issues
• The in-plane shear stress for the CQUAD4 and CTRIA3 was not accurate. In the pure in-plane
bending state there was some error in the values for the shear stress.
• In some cases, corner stresses for shell elements could be incorrect when there were also solid
elements in the model and corner stresses were requested for those elements, as well.
• In some cases, corner stresses for solid elements could be incorrect.
• Imposed displacement (SPCD) in a local coordinate system was implemented incorrectly for
nonlinear analysis types NLGEOM, IMPDYN, and EXPDYN.
• The calculated contact pressure was incorrect for certain meshes.
• GPSTRESS now available for multiple SUBCASE in the .res file. In the past, only the GPSTRESS
for the first SUBCASE was available in the .res file. Now, the GPSTRESS for every SUBCASE is
available.
• The DRAPE data items T and THETA should be real numbers. In the previous release, if integer
numbers were used they were not correctly converted to real numbers.
• If the Solution Control data EXCLUDE referenced PCOMPP properties, these were not actually
excluded from the buckling analysis. Now, PCOMPP properties referenced by EXCLUDE data are
excluded from the buckling analysis.
• Since the corner stress is the same as the centriodal stress for CTRIA3 elements, output of corner
stress to the .op2 file was skipped if the model only contained CTRIA3 elements. Now, corner stress