UTOMATIC YNAMIC NCREMENTAL ONLINEAR NALYSIS Release Notes ADINA 9.1 December 2015 ADINA R & D, Inc. ADINA System 9.1 Release Notes (for version 9.1.3) December 2015 ADINA R & D, Inc. 71 Elton Avenue Watertown, MA 02472 USA tel. (617) 926-5199 telefax (617) 926-0238 www.adina.com Notices ADINA R & D, Inc. owns both this software program system and its documentation. Both the program system and the documentation are copyrighted with all rights reserved by ADINA R & D, Inc. The information contained in this document is subject to change without notice. ADINA R & D, Inc. makes no warranty whatsoever, expressed or implied that the Program and its documentation including any modifications or updates are free from errors or defects. In no event shall ADINA R&D, Inc. become liable to the User or any party for any loss, including but not limited to, loss of time, money or goodwill, which may arise from the use of the Program and its documentation including any modifications and updates. Trademarks ADINA is a registered trademark of K.J. Bathe / ADINA R & D, Inc. All other product names are trademarks or registered trademarks of their respective owners. Copyright Notice © ADINA R & D, Inc. 2015 December 2015 Printing Printed in the USA New and updated feature summary New and updated feature summary This section lists the new and updated features that are available in ADINA System 9.1, as compared with ADINA System 9.0.7. There are new commands and new and changed parameters associated with the new and updated features. The release notes refer to the commands and parameters in the command- line formats. Further information about the new commands and new and changed parameters can be found in the AUI Command Reference Manuals. For user interface users, most command-line parameters have analogous fields in the dialog boxes. Note, when we refer to documentation, we refer to the versions of the documentation given below in the “Available Documentation” section. Features for all programs Table of supported program versions Platform Operating system Version ADINA-M Parallelized Fortran assembly1 compiler Linux 2.6.18 and higher, 64-bit Parasolid Yes Intel ifort 11.1 x86_642 glibc 2.5 and higher, and Open gcc 4.1.2 and higher Cascade Windows Windows XP, Vista, 64-bit Parasolid Yes Intel Visual x86_642 7, 8 and Open Fortran 11 Cascade 1) All program versions have parallelized solvers. Only ADINA and ADINA-Thermal have parallelized assembly. 2) The Intel 64 and AMD Opteron implementations of the x86_64 architecture are supported. Improvements to the floating license option The ADINA System now uses Reprise License Manager (RLM) for the floating license option. An option is now available to hold an AUI floating license for the entire analysis. This option is useful for analyses that require steered adaptive meshing (SAM) as it ensures an AUI floating license is always available for the adaptive meshing. ADINA System 9.1 Release Notes 3 New and updated feature summary ADINA Handbook An ADINA Handbook is now available that covers geometry, meshing, and the fast graphics mode. ADINA Solids & Structures features Improvements for fracture mechanics The station virtual shift (SVS) method is now available for fracture mechanics of 3-D crack models. This method has the following features: • General mesh (mapped or free-form) everywhere, including at the crack fronts. • Mixed mode stress intensity factor calculations in linear elastic analysis for mode I, II and III fracture using the method of auxiliary fields. • Energy release rate calculations for mode I. • More than one 3D crack can be modelled at a time. Only one ADINA-IN command is required for each crack definition. • Virtual crack advance at crack advance stations, not necessarily at nodes. The advantage is that as the mesh is refined, the number of crack advance stations on the crack front can be held constant, so the virtual crack advance is independent of the meshing. • Shifting of nodes adjacent to the crack front to the quarter-points by option. • Various error measures output so that the user can assess the quality of the integrations used in the calculated stress intensity factors. The 9.0 virtual shift method is now referred to as the nodal virtual shift (NVS) method. Chapter 10 of the ADINA Structures Theory and Modeling Guide is extensively rewritten. Command-line: CRACK-SVS FRACTURE ... METHOD Improvements to frequency analysis using the CMS method The number of eigenpairs “p” to be solved can now be different from the number of static constraint modes “r” and the number of fixed interface dynamic modes “s”. That is, the program now only solves for the eigenpairs “p” requested. This is useful for problems where p<<(r+s) as it significantly reduces the memory required and the CPU time. The CMS method can now use either the subspace method or the Lanczos method for solving the fixed interface modes. 4 ADINA System 9.1 Release Notes New and updated feature summary Command-line: FREQUENCIES ... METHOD NFREQ-CMS Energy calculations The energy associated with the whole model and with selected parts of the model can now be viewed as the solution progresses using the “Energy View” tab in the “ADINA Structures Solution Process” window. The energies can also be viewed after the solution is completed using the standalone “Energy View” utility, and the energies can be exported to a text file. The following energies are output: • Work done by external forces. • Kinetic energy. • Elastic and plastic strain energy. • Energy dissipated by Rayleigh damping and by concentrated dampers. • Energy stored by compliant contact. • Energy dissipated by frictional contact. • Energy dissipated by contact damping. • Energy balance. Currently, only the following is supported: • 2D solid elements, 3D solid elements, concentrated masses, and concentrated dampers. • 3D contact (2D contact is not supported). • The in-core memory allocation option IOPTIM=3 (the out-of-core memory allocation option IOPTIM=2 is not supported). The following material models are supported: • Linear elastic and linear thermo-elastic, isotropic and orthotropic, material models. • Elastic-plastic, thermo-elastic-plastic, and creep material models. • Cam-clay and Mohr-Coulomb geotechnical material models. • Hyperelastic rubber models (viscoelastic and Mullins effect energy dissipation effects are not supported). Command-line: ENERGY Implicit dynamic analysis The Bathe method of time integration is the default in ADINA 9.1. This default applies to both implicit dynamic analysis, and also to low-speed dynamic analysis. ADINA System 9.1 Release Notes 5 New and updated feature summary The Bathe method is now the default for the commands listed below. Command-line: ANALYSIS DYNAMIC-DIRECT-INTEGRATION AUTOMATIC TIME-STEPPING AUTOMATIC TOTAL-LOAD-APPLICATION ANALYSIS-SWITCH TMC-CONTROL Improvements to analysis-switch The ANALYSIS-SWITCH command now allows the program to automatically switch, without the need for a restart, between all analysis types at specified solution times or at no convergence. If the program switches the analysis type due to no convergence (e.g. from static to dynamic analysis), then the program switches back to the original analysis type after time TSWITCH. If TSWITCH=0.0, the program does not switch back. The ANALYSIS-SWITCH option can also be used to switch from static or dynamic analysis to frequency or linearized buckling (modal) analysis without the need for a restart. Command-line: ANALYSIS-SWITCH ANALYSIS MODAL-TRANSIENT ... NSTEP DTSIZE Improvements to automatic time-stepping The automatic time stepping (ATS) feature can now automatically switch from static to low- speed dynamic analysis, without the need for a restart, at no convergence. The program will then switch back to static analysis after time TSWITCH. If TSWITCH=0.0, the program does not switch back. Command-line: AUTOMATIC TIME-STEPPING ... RESPS ... TSWITCH Improvements to automatic total load application The total load application (TLA) feature can now automatically switch from static to low- speed dynamic analysis, without the need for a restart, at no convergence. The program will then switch back to static analysis after time TSWITCH. If TSWITCH=0.0, the program does not switch back. Command-line: AUTOMATIC TOTAL-LOAD-APPLICATION ... UNLOAD SWITCH TSWITCH 6 ADINA System 9.1 Release Notes New and updated feature summary Improvements for reaction saving By default, the reactions are now saved to the porthole file when a Nastran file is imported into ADINA. Note, prior to ADINA 9.1, by default, no reactions were saved to the porthole file when a Nastran file was imported into ADINA. The REACTION and REACT-TOL parameters in the PORTHOLE command can now be used to control which reactions are saved to the porthole file. Note, prior to ADINA 9.1, reactions numerically close to zero were not saved to the porthole file. Command-line: PORTHOLE ... REACTION REACT-TOL Eight-chain material model The eight-chain material model for rubber is implemented. The eight-chain model is similar to the Arruda-Boyce model; the difference is that the eight-chain model uses the exact Langevin function, whereas the Arruda-Boyce model uses an approximate series expansion of this function. Command-line: MATERIAL EIGHT-CHAIN RUBBER-TABLE EIGHT-CHAIN Improvements to Arruda-Boyce material model In the MATERIAL ARRUDA-BOYCE command, in version 9.0, the material constants MU, LAMDA, KAPPA have nonzero defaults. In version 9.1, these defaults have been removed. Command-line: MATERIAL ARRUDA-BOYCE Bergström-Boyce material model for rubber viscoelasticity This material model is available for 3-D solid elements. This viscoelastic model is especially well suited for modeling the finite viscoelastic response of filled rubbers, nitrile rubbers, silicone rubbers, and other elastomers. See Section 3.8.2.2 of the ADINA Structures Theory and Modeling Guide for details.