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ANSYS 6.0 New Features

ANSYS 6.0 New Features. Intel IA-32 Windows NT 4 SP 5 Windows 2000 Windows 98 Windows ME Intel IA-32 (Linux Redhat 6.1) HP PA8000 32-bit (HP-UX 10.20) HP PA8000 64-bit (HP-UX 11.0) HP Itanium IA64 (HP-UX 11.20). SGI 32-bit (IRIX 6.5.10) SGI 64-bit (IRIX 6.5.10)

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ANSYS 6.0 New Features

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  1. ANSYS 6.0 New Features

  2. Intel IA-32 Windows NT 4 SP 5 Windows 2000 Windows 98 Windows ME Intel IA-32 (Linux Redhat 6.1) HP PA8000 32-bit (HP-UX 10.20) HP PA8000 64-bit (HP-UX 11.0) HP Itanium IA64 (HP-UX 11.20) SGI 32-bit (IRIX 6.5.10) SGI 64-bit (IRIX 6.5.10) Sun Ultra 32-bit (Solaris 8) Sun Ultra 64-bit (Solaris 8) IBM RS/6000 (AIX 4.3.3-08) 32-bit IBM RS/6000 (AIX 4.3.3-08) 64 bit Compaq Tru64 64-bit (v5.0A) SystemsSupported Platforms Note: The HPPA 7000 HP-UX 10.20 version is no longer available.

  3. IntroductionWhat’s New in ANSYS 6.0? Enhancements at ANSYS 6.0 fall into the categories of usability, functionality, and performance improvements.

  4. IntroductionWhat’s New in ANSYS 6.0? • Usability • Variable Viewer for time history post-processing • Shell section builder • Material GUI for ANSYS/LS-DYNA • Curve plotting for materials, loads, etc. in ANSYS/LS-DYNA • Reorganized Contact Wizard dialog boxes • PDS Method Wizard • Mouse button re-mapping functionality • Center of rotation in dynamic mode • GUI for DISPLAY and CMAP utilities on UNIX

  5. IntroductionWhat’s New in ANSYS 6.0? • Functionality • Enhanced Nonlinear Material Models • Numerous 18X element enhancements • Thermal loading in ANSYS/LS-DYNA (new at 5.7.1) • Full restart capability for ANSYS/LS-DYNA • Pure thermal contact • Variable friction coefficient • Primary variables X, Y, Z, and temperature for tabular loads • New Cyclic Symmetry procedure • More robust boolean operations • Collocated Galerkin advection method for FLOTRAN • New velocity-pressure solution algorithm for FLOTRAN

  6. IntroductionWhat’s New in ANSYS 6.0? • Performance • Faster Sparse Solver • default solver • uses symbolic assembly process • Less memory required for Block Lanczos mode extraction • Faster replots of subsets of elements • Improved reading speed of large text files

  7. UsabilityTime History Post-Processor - Variable Viewer • Compact easy-to-use interface • Supports all time history postprocessor functionality except RPSD, RESP, and CVAR commands • All executed commands are written to the log file

  8. UsabilityVariable Viewer - layout Access to new time history postprocessor GUI

  9. UsabilityVariable Viewer - import capability • The Import allows users to import data from an external ASCII file into the Variable Viewer • This offers a convenient method to simultaneously graph experimental results and FEA results on the same plot • This text file can be in comma, tab, or space delimited format • The name of each variable should be in the first row of each data column

  10. k = 36kN/m 100kg x k = 36kN/m 25kg F y UsabilityVariable Viewer - import data example • Theoretical results identified by the diamond markers on the graph • ANSYS results are identified by the cyan colored curve in the graph

  11. UsabilitySolid Model Boundary Condition Symbol Control • Solid model BC symbol control command added: • centroid (new) OR • tessellation face

  12. UsabilityUser control of mouse buttons • Re-mapping mouse button functionality for dynamic mode manipulation (when activated by holding the control key) • Useful to mimic other CAD package behavior • First mouse pick in dynamic mode specifies center of rotation for Open-GL 3D graphics • This is the default behavior for 3D at ANSYS 6.0 but can be turned off if desired

  13. UsabilityAntialiasing for Open-GL graphics (3D) • Improved appearance of lines on Open-GL graphic display devices. Reduces “stair-step”. ANTI Off ANTI On

  14. UsabilityGUI for DISPLAY and CMAP on UNIX • Similar in appearance to the GUI available on Windows • Additional feature which allows re-sequencing or removing plots and saving as a new grph file. • “Read Input From” option available for reading a command file

  15. Seven Tabs UsabilityContact Wizard Enhancement • Wizard dialog boxes reorganized into seven pull down tabs for added clarity and flexibility. • Allows access to ALL material, real constant, surface behavior and solution options.

  16. UsabilityPDS Method Wizard • The new wizard helps you to determine the most optimal method and Run-Time estimates for solving a Probabilistic Design Analysis. • It is based on your set of goals, finite element model characteristics which the user selects, with easy to follow prompts • The wizard also sets the design method by issuing commands with appropriate options. • Ideal for novice users and a useful tool for experienced users to verify their selection

  17. UsabilityPDS Method Wizard (Cont’d) • The new wizard helps you to determine the most optimal method and Run-Time estimates for solving a Probabilistic Design Analysis. • It is based on your set of goals and model characteristics with easy to follow prompts. • The wizard also sets the design method by issuing commands with appropriate options. • Ideal for novice users and a useful tool for experienced users to verify their selection. • Commands are also written to the log file.

  18. UsabilityPDS Method Wizard (Cont’d) • Series of Wizards guides user through PDS setup.

  19. UsabilityANSOL Command • New command to average element nodal values at nodes in the time history postprocessor. • Command format: • ANSOL, NVAR, NODE, Item, Comp, Name, Mat, Real , Ename • Command behavior: • Element nodal results are in the element coordinate system. • ANSOL does not transform results from RSYS, SOLU to other coordinate systems. • Derived quantities (e.g. S, EQV) are affected by the AVPRIN command setting.

  20. Ux time Node 28 Elements contributing to the nodal stress at Node 28 Usability ANSOL Command - example Is the mesh adequate in the fillet region for this linear transient structural analysis? Applied Displacement: Ux Close up of node at stress concentration: Base fixed

  21. Usability ANSOL Command - example ... Average von Mises stress at node 28 calculated using ANSOL command! Large difference between nodal and element stresses suggest mesh refinement is needed in the fillet region!

  22. SECTYPE SECDATA SECFUNCTION SECOFFSET UsabilityLaminated Composite SHELL181 • Shell Section Builder GUI - Layup Tab

  23. ... Usability ANSYS/LS-Dyna New Material GUI • Tree structure consistent with implicit ANSYS material GUI

  24. Usability ANSYS/LS-Dyna New Material GUI... • Materials grouped together for convenience

  25. Usability ANSYS/LS-Dyna New Material GUI... • Input simplified and less error prone • GUI prevents entering DENSITY as a function of temperature • MPMOD and MPUNDO no longer used • Batch input directly recognized in the GUI (w/o MPMOD)

  26. UsabilityMiscellaneous Enhancements • The new KEEP command saves time history postprocessor variable definitions in memory: • Allows one to exit and renter /POST26 without losing variable information • Enhanced Graph Quality and Creation • Bitmap font used for graph text (legend, axis labels, values, etc.) • Allows repositioning of the X and Y axes • Use of user defined labels on NSOL command in display/listing commands: • NSOL,5,28,U,X,UX_28 • Issuing PRVAR,UX_28 or PLVAR,UX_28 lists and displays the node 28 results, respectively. • New ANSOL command to average element nodal values at nodes in the time history postprocessor

  27. APDL Overview • Enhancements in APDL include: • *GETs for: • minimum and maximum entity numbers • Additional commands for PATH information • *IF nesting level increased from 10 to 20 levels • Parameter and component name lengths increased to 32 characters • Eight new functions for bit manipulation • Many more . . .

  28. Functionality Cyclic Symmetry • New analysis procedure replaces CYCGEN / CYCSOL procedure • Supported analysis types at 6.0: • Modal (with and without pre-stress) • Static (cyclic loading only) • More to come . . . • New commands implemented • CYCLIC: Specifies a cyclic symmetry analysis • CYCOPT: Specifies solution options for a cyclic symmetry analysis • CYCPHASE (new at 5.7.1): Determines minimum and maximum possible result values from frequency couplets produced in a modal cyclic symmetry analysis • /CYCEXPAND: Graphically expands a cyclically symmetric model

  29. New procedure for MODAL Cyclic Symmetry FunctionalityCyclic Symmetry... • New procedure • CYCLIC / CYCOPT / SOLVE commands used instead of CYCGEN / CYCSOL • New tools • CYCPHASE • “phase sweep” • /CYCEXPAND • graphic expansion

  30. FunctionalityBoolean Operation Enhancements • Solid modeling tolerances [BTOL] are now computed automatically based on model size. • New diagnostic error messages: • If bad geometry, problem entities will be indicated by number and instructions given for displaying the untrimmed area [SPLOT]. • If a topological problem, tightening BTOL will be recommended to avoid merging out entities. • If a Boolean failure then loosening BTOL will help as long as the tolerance remains smaller than the shortest line.

  31. Functionality Materials • Enhancements for release 6.0 • Creep plus Bilinear Kinematic Hardening Plasticity • Anisotropic Plasticity with Kinematic Hardening • Anisotropic Viscoplasticity • Anisotropic Implicit Creep

  32. Functionality Materials, Creep plus BKIN Plasticity • Combines Implicit Creep with BKIN • Added to 180 series of elements and 5 core elements (42,45,82,92,95) • Combines TB,BKIN and TB,CREEP • No new commands created

  33. Functionality Anisotropic Kinematic Plasticity • Combines MKIN/KINH with Hill anisotropy • Combines CHAB with Hill anisotropy • CHAB can also be combined with BISO, MISO or NLISO • Added to 180 series of elements and 5 core elements • No new commands created

  34. Functionality Viscoplasticity • Viscoplasticity is rate dependent plasticity • Viscoplasticity can be plasticity plus creep • Viscoplasticity can be an integrated form (Anand) • Viscoplasticity can be plasticity plus rate effects • Two rate laws available - Perzyna and Pierce • Implemented with TB,RATE • Must be used with some form of isotropic hardening plasticity

  35. Functionality Anisotropic Implicit Creep • Combines Creep with Hill anisotropy • May include plasticity (BISO, MISO, NLISO or BKIN) • Applicable to 180 series of elements and 5 core elements • No new commands

  36. Functionality Combinations available at 6.0 BISO+CHAB BKIN+CREEP* NLISO+CHAB+HILL* MISO+CHAB BISO+HILL BISO+RATE+HILL* NLISO+CHAB MISO+HILL MISO+RATE+HILL* BISO+RATE NLISO+HILL NLISO+RATE+HILL* MISO+RATE BKIN+HILL CREEP+HILL* NLISO+RATE MKIN+HILL* BISO+CREEP+HILL* BISO+CREEP CHAB+HILL* MISO+CREEP+HILL* MISO+CREEP BISO+CHAB+HILL* NLISO+CREEP+HILL* NLISO+CREEP MISO+CHAB+HILL* BKIN+CREEP+HILL* *New for Release 6.0 • There is no need to remember available combinations, Material Models GUI will guide user through the various steps • Only permissible combinations can be entered via GUI

  37. Functionality Dynamic Friction Coefficient • Extends the capability of surface to surface contact simulation to include the friction coefficient as an exponential function of velocity • Offers a smooth transition from the static to the dynamic coefficient of friction

  38. Functionality Dynamic Friction Coefficient (cont’d) • Friction parameters can be specified by manually defining real constants and mat’l properties or via the contact wizard or

  39. Functionality Damping added to Gap Condition inMode-Superposition Transient • The gap condition [GP] is used in linear transient analyses where no other type of gap is permitted • Damping can now be input in addition to stiffness and gap size • Damping is only available for mode-superposition transient • Damping cannot be specified for gap conditions in a reduced transient [TRNOPT,REDUC]

  40. Functionality 18x Family of Elements • Laminated composite SHELL181 • Enhanced strain formulation for 182 & 185 • Birth and death feature • SHELL181 initial stress enhancements • user can now define an initial stress at each integration point on each layer of a layered SHELL181 element

  41. Functionality Laminated Composite SHELL181 • SHELL181 now models laminated composite structures • Multiple material models allowed in the same laminate • Offset of reference plane and tapered shells permitted • New SHELL181 sections analogous to BEAM188/189 sections • Shell Section Builder GUI makes construction of laminates easy • Section calculations independent of element type • Section Builder on next slide

  42. SECTYPE SECDATA SECFUNCTION SECOFFSET Functionality Laminated Composite SHELL181 (cont’d) • Shell Section Builder GUI

  43. SECPLOT, SECID, BegLay, EndLay Functionality Laminated Composite SHELL181 (cont’d) • Shell Section Builder GUI

  44. Functionality Birth and Death Feature • The Birth and Death feature extended to 18X series of elements • 18X family of elements: • LINK180, 3-D Finite Strain Spar (Truss) • SHELL181, Finite Strain Layered Shell • PLANE182, 2-D 4-Node Structural Solid • PLANE183, 2-D 8-Node Structural Solid • SOLID185, 3-D 8-Node Structural Solid • SOLID186, 3-D 20-Node Structural Solid • SOLID187, 3-D 10-Node Tetrahedral Solid • BEAM188, 3-D 2-Node Finite Strain Beam • BEAM189, 3-D Quadratic Finite Strain Beam

  45. Functionality Enhanced Strain Formulation for 182 & 185 • Additional terms added to Strain calculation of the lower order elements PLANE182 (2D-4 node structural) and SOLID185 (3D-8 node Structural): • accurately simulates bending dominated problems • prevents volumetric locking, especially in bending dominated problems • Combines with mixed u/p formulation to simulate fully incompressible material (hyper-elastic).

  46. A B Functionality Enhanced Strain Formulation for 182 & 185 (cont’d) • Example: Shear Locking in 3-D - Pinched Hemisphere: • A Standard NAFEMS example • Loads at A and B • Simulated by 185 with enhanced strain and B-bar formulation

  47. Displ. at A & B (Enhanced Strain) Displ. at A & B (B-bar) NAFEMS|UA| NAFEMS|UA| |UA| UB NAFEMSUB NAFEMSUB |UA| UB Functionality Enhanced Strain Formulation for 182 & 185 (cont’d)

  48. Functionality ANSYS/LS-Dyna Thermal Loading (New at 5.7.1) • Both Static (Preload) and Transient Thermal Loading • Temperature dependent material required to activate loading • PLANE162, SHELL163, and SOLID164 elements supported

  49. ... Functionality ANSYS/LS-DYNA New Material GUI • Tree structure consistent with implicit ANSYS material GUI

  50. Functionality ANSYS/LS-DYNA Additional Enhancements • Support of LS-DYNA 960 at ANSYS/LS-DYNA 6.0 • Full Restart Capability • More Constraints (Rivets, Shell-to-Solid, etc.) • Curve Plotting for Materials, Loads, etc. • Fully-Integrated SHELL163 Formulation • Additional Contact Controls • Geological Cap Material Model (Soil, Rock, etc.) • Additional Adaptive Meshing Controls • Initial Velocity Specification for Parts • LS-DYNA Diagnostic Messages

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