R19.0 Structural Mechanics

1 © 2017 ANSYS, Inc.January 17, 2018 Headlines Performance Solver scalability, Contact, 4 Cores Fracture & Non Linear Adaptivity (NLAD) S.M.A.R.T fracture in Mechanical, High order NLAD Usability & Capabilities External model, Material plots, Acoustics 2 © 2017 ANSYS, Inc. January 17, 2018 Mechanical Composites, External Model, Usability, Topology Optimization, Preprocessing Dynamics Explicit Dynamics, Rigid Body Dynamics, Linear Dynamics Physics Acoustics, SMART Fracture, NLAD, Multiphysics Solver & Element technology Contact, Element Technology, Non Linear Transients, HPC 3 © 2017 ANSYS, Inc. January 17, 2018 Mechanical 4 © 2017 ANSYS, Inc. January 17, 2018 2018 . Inc. January 17. Composites Field-dependent Material Properties Import spatial fields • Scoping on model down to ply-level • element-wise • Variable density Scope field definitions to • node-wise • Element Sets (Named Selections) • Material plots in Mechanical • layer-wise • Oriented Selection Sets • Improved interpolation algorithms • Modeling Plies 5 © 2017 ANSYS. Composites . 2018 . Inc.Mapping of a Composite Lay-up onto a Solid Mesh ACP layup definition Map shell-based composite definitions onto an solid mesh to build a layered composite solid model. • ACP automatically builds a 3D lay-up • Solid mesh is generated outside ACP + External solid mesh • Use cases: – Full cross-section composites. January 17. turbine blade – Where the standard solid model (extrusion) of ACP is not feasible Layered solid mesh 6 © 2017 ANSYS. 2018 . January 17.Updates AVRAMI – Erofeev new cure kinetics equation Linear viscoelasticity added to allow simulation of material behaviors with strong viscous relaxation Simulation of polymerization with two competing reactions Stiffness relaxation expressed in terms of Prony series New equation allows to capture dual exothermic This capability allows to simulate residual stress peak during polymerization relaxation effects when component is exposed to in- service loading 7 © 2017 ANSYS. Inc. Composites .ANSYS Composite Cure Simulation . External Model - 19.0 Enhancements Import additional data from input files Nodal Boundary Conditions can now be imported from • Boundary Conditions the following sources • Nodal Loads MAPDL ABAQUS NASTRAN • Constraints D and F commands *BOUNDARY and SPC, SPC1, SPCADD and *CLOAD keywords SPCD • Bolt Pretension FORCE, FORCE1, FORCE2, Usability enhancements MOMENT, MOMENT1, MOMENT2 and LOAD • Ability to promote all rows from the tree 8 © 2017 ANSYS, Inc. January 17, 2018 External Model - Boundary Conditions Each Degree of Freedom (DOF) value is represented by a different column. User can edit/deactivate the loads for each step / DOF in the tabular data view 9 © 2017 ANSYS, Inc. January 17, 2018 External Model - Boundary Conditions • In addition to imported data, user has ability to add additional DOFs to Imported Boundary Conditions or remove imported DOFs from the analysis • User has the ability to choose display color for all active DOFs from details view. • User has the ability turn ON / OFF display of individual DOFs in graphics from toolbar • Supported in most analysis types 10 © 2017 ANSYS, Inc. January 17, 2018 External Model - Bolt Pretension • Bolt Pretension Sections can now be imported from the following sources: • ABAQUS • PRE-TENSION SECTION • MAPDL • Elements PRETS179 • Can then be promoted to specific environments ABAQUS MAPDL 11 © 2017 ANSYS, Inc. January 17, 2018 0 –Maxwell Eddy Current to Harmonic supported in R18.2 12 © 2017 ANSYS. January 17. 2018 . Inc. Element Based Force Coupling (Maxwell Transient – Harmonic) Ability to transfer EM forces from Maxwell to a frequency domain Harmonic Analysis –Maxwell Transient to Harmonic supported in 19. you can create. • Vertices • Edges • Faces • Nodes • Elements 13 © 2017 ANSYS. change. 2018 . and overwrite your clipboard selections in order to temporarily save selection entities. store and build up geometry or mesh selections. add to. Ctrl + R Keyboard shortcuts Using the options of the Clipboard menu. January 17. Inc. Clipboard Toolbar Ctrl + Q The Clipboard toolbar is a selection feature Ctrl + W that assists you to make. January 17. You can also convert element face-based Named Selections to node-based Named Selections. Element Face-Based Named Selections using the Worksheet The Element Face Entity Type has new criteria specifications: • Normal. Includes all element faces whose face centroid location matches the input value. 14 © 2017 ANSYS. and Location Z. Location Y. Inc. Includes all element faces whose normal direction is same as the selected axis • Location X. 2018 . Temperature reduced to 22C 5. bonded contact dead at specified load steps 2. No-separation contact active. Bonded contact activated 4. January 17. Inc. Second layer of elements killed 15 © 2017 ANSYS. Top layer of elements killed Element birth and death 6. 2018 . Temperature raised from 22 to 100C 3. Birth and Death Example model Contact and Element birth and death now • 2 blocks of differing expansion properties native to Mechanical • 2 contact pairs Activate and deactivate contact 1. Material Plotting New object under Geometry for visualizing material properties on selected geometries. Spatially varying materials and imported material fields 16 © 2017 ANSYS. January 17. Inc. 2018 . January 17. Works on User Defined Results (UDR) 17 © 2017 ANSYS. Report average and total results Two new result object properties are available: Average and Total. Area. or Energy. Average value is provided for results when Minimum and Maximum values are listed (This value is an arithmetic mean). 2018 . Force. Mass. Inc. Total result available with: Length. Volume. This Total value is an arithmetic sum. Moment. the application provides the context menu (right-click) options Create Peak Probes (K) and Create Valley Probes (L). these options display probe labels for the largest (Peak) and smallest (Valley) result values within the local range. Inc. Detect several min/max (peaks and lows) For nodal results such as displacements. January 17. As shown on the context menu. and element nodal results such as stresses and strains. When activated. The display limit for these options is six labels. 18 © 2017 ANSYS. the K and L keys also activate the options. 2018 . 2018 . Inc. January 17.err) file included in the target directory. 0110 Now. 1101 file. you can also use uncombined result files from a Distributed ANSYS solution instead of a single combined result file. Result files .rst or . 19 © 2017 ANSYS.Easy import of RST files The Read Result Files option (Tools Menu) no longer requires that 1011 you have an error (. the application only needs the result file (.rth).rst In addition. contact conditions. Result files – Post any result from RST file Posting of any results on RST file via "Result File Item" scoping with node or element id 1011 If the Scoping Method property of a result is set to Result File Item. in file. The application also assigns an ID to these elements as well as the elements corresponding nodes. or support conditions. 20 © 2017 ANSYS. 2018 . not included in the original mesh. You can also use these system generated element and node IDs for further post processing. 1101 In addition. Element IDs. the Item Type property 0110 is set to Materials IDs. Element Name IDs. Inc.rst order to process loads. January 17. the solver may generate new elements. or Node IDs. Element Type IDs. faster solve times To use of the On Demand Stress/Strain property: • Set the Stress and Strain properties of the Output Controls of the Analysis Settings object to No. January 17. elastic strain. 2018 . Inc. and thermal strain results without writing the associated data to the result file. 21 © 2017 ANSYS. Live stress/strain computations (without writing stress on rst file) On Demand Stress/Strain Evaluate stress. • Smaller result file size (especially for models with layered shells) • Less writing to disk during solve. 2018 . Topology Optimization Inertial Loads are now supported Thermal Condition and Temperature loads Topology Optimization • Thermal loading can now be taken into account for topology optimization • Example below aims to limit vertical displacement Thermal condition effects excluded Topology Density Result Thermal condition effects included 22 © 2017 ANSYS. January 17. Inc. Symmetry. 2018 . cyclic and Extrusion manufacturing constraints are supported Solve. January 17. Inc. Topology Optimization The user can perform RSM solution on Multiple and combination of Pull out both Windows and Linux clusters direction. My computer Background RSM Job monitor for Topology Optimization 23 © 2017 ANSYS. 0 Topology Optimization –Penalty factor ( Stiffness ) is now supported. 2018 . but we will change the name to Penalty factor (Stiffness) Penalty factor (Stiffness ) = 3 Penalty factor (Stiffness ) = 2 24 © 2017 ANSYS. Inc. Topology Optimization At 19. January 17. At present it is named as Penalty Parameter. January 17. Inc. Geometry. and Model cell data 25 © 2017 ANSYS. Topology Optimization For topology optimization studies of multiple upstream systems. Newly created systems automatically share Engineering Data. you no longer have to update each newly created design validation systems. 2018 . Preprocessing Highlights: Simplified defaults/setup Improved size factors Improved defeaturing Improved shell meshing Cartesian meshing Improved hex meshing Improved mixed order meshing Improved contact sizing 26 © 2017 ANSYS. Inc. 2018 . January 17. Simplified mesh sizing user experience: • Layout of meshing controls simplified to make frequently used options easier to find • Further simplification of meshing options can be done by turning on Simplified mesh sizing UI 27 © 2017 ANSYS. January 17. Inc. 2018 . Inc. January 17. 2018 . Shell Meshing: Improved mesh patterns R18 R19 Improved handling of cylinders More uniform mesh Improved handling of pinched regions R18 R19 R17 R18 R19 28 © 2017 ANSYS. Shell Meshing: Improvements in bolt holes & washers Improvements to mesh patterns around holes Improvements to washer generation (layer around hole): R19 – Better alignment – Quality improvements by moving away from geometrical constraints R18 R19 29 © 2017 ANSYS. Inc. January 17. 2018 . Cartesian Meshing New types of Cartesian meshing: – Stair-step all-hex mesh. useful for the following: • Explicit dynamics • Electronics components • Environment & Process industry modeling • Biomedical modeling Projection Factor controls how closely to follow the geometry (trade-off between mesh quality and feature capturing): 30 © 2017 ANSYS. useful for the following: • Additive Manufacturing Print Simulations • Quick & Dirty meshing solutions (uniform hex mesh for quick solution) – Body-fitted all-hex mesh. Inc. 2018 . January 17. 2018 . Cartesian Meshing: Other features • Cartesian mesh spacing options to allow more control over fitting of cartesian elements to your geometry • Cartesian meshing uses inflation in key areas to improve quality in corners No With inflation inflation 31 © 2017 ANSYS. Inc. January 17. January 17. Inc. robustness & performance • Improved support for cases with intersecting imprints • Improved defeaturing • Improved decomposition . O-grid and mapping MultiZone Defeaturing 32 © 2017 ANSYS. Hex Meshing: MultiZone improvements • Improved automation. 2018 . 2018 . January 17. Inc. Hex Meshing: Bolt Example Improved: – Mapped mesh – Decomposition – O-Grid pattern 33 © 2017 ANSYS. Inc. January 17. 2018 . Dynamics 34 © 2017 ANSYS. January 17. Joints in Explicit Dynamics General (and derived) & Bushing joints • Both Body-Ground. 2018 . Inc. Body-Body • Combine Flexible and Rigid parts • Joint probes (Force. displacement etc) • Joint loads • Joint stops/locks/restitution 35 © 2017 ANSYS. Moment. 2018 . Inc. Explicit Dynamics Point masses for Explicit Dynamics can now be defined • Object in Geometry folder • Mass and Mass moments are added to the lumped properties of the nodes in the Remote Point scope Drop test Wizard The drop test wizard in Explicit Dynamics has now been added to the Workbench LS-Dyna system. January 17. 36 © 2017 ANSYS. LS-Dyna . January 17. 2018 .k file reader in External Model • Motivation: –Allows users to read in LS-Dyna input files directly into Workbench –Gives a route to import models from non-Ansys LS- Dyna solvers • Example: New customer to Ansys LS-Dyna who previously had LS-Dyna from another supplier can now import their legacy models in to workbench 37 © 2017 ANSYS. Inc. … Example: Flock of Drones –Create one single FMU for the drone –Setup system model in MECSYCO (FMU master) –20 drones are launched with a random target position –Ask them to reach some common meeting points 38 © 2017 ANSYS. 2018 . Simplorer. Co-simulation Functional Mock-up Unit (FMU) export Motivation: –Allows use of assemblies of rigid or deformable bodies in system level transient simulation –Provides a unified interface to Matlab. January 17. Simulink. Inc. Miscellaneous enhancements Joint Friction enhancements –Improved performances for Stick / Slip transition Large contact models performance enhancement –Solution Initialization time 3-6x faster Energy based Kinematics –Provides “Physics-aware” stabilization of time integration 39 © 2017 ANSYS. January 17. 2018 . Inc. January 17. 2018 . Linear Dynamics New COMBI250 Bushing Element Cyclic Fluid Structure Interaction Analysis 2 nodes – 6 dofs/node Modal and full harmonic analyses are now supported Real constants: • K1 to K6 (stiffness) Mix of structural and acoustics elements • CV1 to CV6 (viscous damping) No specifics for cyclic procedure • KIMAG1 to KIMAG6 (structural damping) Element coordinate system and offset Equivalent to Nastran CBUSH 40 © 2017 ANSYS. Inc. Energies Enhancements Additional energy calculations for full transient. and ESOL with new labels Mechanical APDL Theory Reference > 14. Inc. ENERSOL. PLESOL. PRESOL. 2018 . full harmonic. January 17. or MXPAND. and modal analyses activated with EngCalc on TRNOPT. HROUT. Accurate computation of complex energies (peak and amplitude) when solution is complex Calculation of the work of external load and dissipation energy New VENG on OUTRES to only output the energies Post-processing using usual PRENERGY.16 Energies Verification Manual > to be added AFT done by Julien Ravoux – WB project available 41 © 2017 ANSYS. 2018 . January 17. Physics 42 © 2017 ANSYS. Inc. Irregular Perfectly Matched Layers Introduce PML absorption condition on a convex enclosure (no shape limitation) –No more constrained to cartesian box –Reduce mesh size –Option available on Physics Region 43 © 2017 ANSYS. January 17. Acoustics . Inc. 2018 . 2018 . January 17. Acoustics . Inc.Transfer Admittance Matrix: Hexagonal & Square grid plate Avoid meshing a complicated perforated structure Numerical model based on perforation dimensions Common usage for muffler applications 44 © 2017 ANSYS. Far-field microphone results Allow to plot acoustic quantities (pressure. January 17. 2018 . SPLA. Inc. SPL. phase) function of the frequency at defined location outside the model mesh 45 © 2017 ANSYS. Acoustics . SPLA…) on selected geometric entities or nodes 46 © 2017 ANSYS. Acoustics . Inc. January 17.Results Radial axis bounds for Far Field Polar Plot Trim the polar plot values and tabular data based on bounds specified by the user Results between ports Plot Transmission between 2 ports or Absorption coefficient and return at a given port function of the frequency Frequency response results Plot frequency varying (Pressure. SPL. 2018 . January 17.R. Inc. Morphing. .A. Adaptive and Re-meshing Technology Supports –Mode I dominant crack propagation –Static crack propagation based on failure criteria (Stress intensity factor or J-Integral) –Fatigue crack propagation based on Paris law defined using Engineering Data –Crack propagation of • Semi-elliptical • Arbitrary cracks • Pre-meshed cracks 47 © 2017 ANSYS.M.T.Separating. S. 2018 . 2018 .T.Results Results from S.A. . analyses can be post processed in Mechanical via: • Standard Mechanical contour plots + animations • Standard Mechanical probes Turbocharger blade with a pre-exist crack • Pressure load on blade surface • Fatigue crack growth with Paris Law 48 © 2017 ANSYS. Inc. S.M.M.R.R. January 17.T.A. 0 • Nonlinear adaptivity (NLAD) – Support 10 node tetrahedral elements: Solid 187 and Solid 227 – New option to refine elements of Plane182. Solid187 and Solid287 through general remeshing – Allow combined criterion options CONTACT/ENERGY/BOX/MESH in the same input – Support 3D fluid penetration • 2D to 3D analysis – MAP2DTO3D • Support distributed ANSYS 49 © 2017 ANSYS. Inc. January 17. Plane222. Non-Linear Adaptivity . 2018 .New Features At 19. Examples Glass Blowing Cross-bar impression Elasto-plastic materials with 13 remeshings Visco-plastic material using PEIRCE rate law: 12 remeshings 50 © 2017 ANSYS. January 17. NLAD . 2018 . Inc. CONTACT. Inc.dat 51 © 2017 ANSYS.VAL1 – Through general remeshing instead of splitting • Better element shapes in mesh transition zone than splitting – 6 times of refinements – Input: oring. January 17. NLAD: 2D O ring simulation • Refinement only with contact based criterion – NLADPTIVE. 2018 .NUELEM... Inc. January 17. 2018 . NLAD: Remeshing/Refinement with 3D Fluid Pressure • Allow refinement and remeshing when fluid pressure exists to get better accuracy Fluid pressure applied to separate the two parts at 2nd load step Without NLAD With NLAD Larger strain value reported with mesh refinement 52 © 2017 ANSYS. 2D to 3D Analysis • MAP2DTO3D Benchmark model (2D3D): DMP run time – Support distributed ANSYS now for performance # of element: ~95000 • Map 2D axisymmetric analysis results to 3D 1 Number of process • Migrate all BCs and Loads to 3D 2 4 • Regenerate contact and surface elements 8 • Rebalance the 2D solutions on 3D domain 16 32 0 500 1000 1500 2000 2500 3000 3500 4000 4500 Run Time (sec.) Distributed ANSYS DMP performance results MAP2DTO3D 53 © 2017 ANSYS. Inc. January 17. 2018 . Surface Loads (Pressure. Inc. Surface Temperature) • 30x to 40x faster 54 © 2017 ANSYS. Heat Transfer Coefficient.5 min (no-octree) 30x Library mapping Coefficient 11 src (octree) (1x with octree) library Volumetric Loads (Body Temperature) • 3x faster for a single time step. January 17.000 45.000 1 8 sec 5. 2018 .000 1 40 sec 20 min+ (no-octree) 30x+ Mechanical (surface) 1min (octree) (1. New Software Architecture for 1 way-FSI Previous CFD-Post based Mapping Load Type Source Target Time Mechanica CFD-Post Performance Ratio Nodes Nodes steps l-Based CFD CFD POST results Body 140.1 M 5 50 sec 11 min 13x Temperature Mechanical Pressure 400.000 1 11 sec 5.000 1.5x with octree) CFXDI CFD C++ New results Heat Transfer 400.000 20.000 20.5 min (no-octree) 40x 8 sec (octree) (1x with octree) New Mechanical-Based Mapping Temperature 100. 1 release making it possible to have dynamic element birth/death within a single loadstep( see *DIM command) • The fast thermal solver( THOPT. 55 © 2017 ANSYS. 2018 .QUASI) has been enhanced to exploit this advanced feature to simulate Additive manufacturing • This example was simulated with a single load step(multiple substeps) using tables for element birth as well as for the heat generation due to the moving laser avoiding multiple SOLVE commands. Fast Thermal Solver Enhancement • Tables allowed nodes/elements as independent variables in Time Dead Elements 18. Inc. January 17. Scale the density. film convection heat loss to fluid flow at inner coeff and Stefan-Boltzmann constant to get radius same solution as full 3D model. January 17. Inc.0 metal radiation fluid FLOW convection 56 © 2017 ANSYS. The scaling factor is 4. 2018 . Radiosity Flux scaling 3D Full Model 90 degree sector model Metallic disk with 4 radiation enclosures. thermal conductivity. Static SOLID226 Electromagnetic VOLT Full Transient Surface loads: convection. 10101 UX. Static Stranded Coil VOLT. 10001 UX. 10010 TEMP. Inc. 2-D 8-node Structural. UY. AZ Static Electromagnetic Full Transient source current density Body load for electromagnetic: velocity 57 © 2017 ANSYS. UZ. 10201 UX. 2018 . EMF Full Transient Body load: heat generation Thermal. AZ. Coupled Field Elements – 22X Thermal and Structural Magneto The 22x coupled-field elements now Coupled-Field Coupled-Field KEYOPT(1) DOF Label Analysis Type support new magnetic coupling for both Elements Analysis structural and thermal with Magnetic PLANE223 DOF’s. 10110 TEMP. heat flux. UZ. 3-D 20-node radiation brick Structural. January 17. UZ. AZ Static Magnetic Loads SOLID227 Magnetic Full Transient 3-D 10-node Body load for magnetic: tetrahedron Thermal. AZ Static quadrilateral Magnetic Full Transient Thermal Loads Structural. AZ. UY. VOLT. UY. Oil and Gas. 2018 . Automotive. Inc. January 17. hardening. Rail. tempering ) 58 © 2017 ANSYS. Aerospace. WHY THERMOMAGNETIC ANALYSIS ? Applications in Electronics. Construction Electromechanical systems • Circuit breakers Heat generated • Actuators • Railguns Metal industry (Induction Heating) • Melting/ Shrink fitting Electrical current • Brazing/soldering/welding Induction heating • Metal treating (annealing. Mining. Inc. January 17. • A stationary solid cylindrical permanent magnet resides with the hollow rotating one. 2018 . • Velocity effect : eddy current in the cylinder -> heat generation Current Density in the Conductive Cylinder Temperature distribution in the problem domain 59 © 2017 ANSYS. 3D STATIC THERMOMAGNETIC SIMULATION • Static Induction Heating: direct coupling via SOLID226 • A long conductive hollow cylinder rotates about its axis. 0.1..1 Current excitation: 5 Amps tbtemp. TEMPERATURE DEPENDENT BH CURVE SIMULATION Simulate the effect of temperature dependent BH curve TB.260 B results must be tbdata.75 BC: Az=0 at the outer boundary T=260C T=500C 60 © 2017 ANSYS.600 tbdata. Inc.3. 2018 .1.8235 Core: ChinaSteel_35CS211 tbdata.TCF Expected results: Assumption: Core temperature is preset tbtemp.1.. January 17.0.430 scaled by 0.BH.88 Element: PLANE233 tbtemp. relays. January 17. motor starters. KEYOPT(4) set to 1 – Maxwell force option used (KEYOPT(8)=0) Ferromagnetic Actuator motion (animation) core Actuator displacement (Ux) Rod Permanent magnet Elastic Air 61 © 2017 ANSYS. 2018 . Inc. Motion of an Electromagnetic Actuator Magnetic flux lines A static analysis is performed to simulate the sliding of a highly permeable rod into a ferromagnetic core gap – Analysis typical for the simulation of solenoid actuators. circuit breakers – Moving rod and elastic air are modeled with the magneto-structural analysis option (KEYOPT(1)=10001) of PLANE223 – Elastic air is assigned a small Young’s modulus. 2018 . Inc. January 17. Stress Analysis of a Solenoid A 3D magneto-structural static analysis is performed to simulate the deformation of a stranded coil carrying an electric current Magnetic flux (BSUM) Deformation (USUM) Von Mises Stress Magnetic force deforms the coil Deformation changes the magnetic field and force 62 © 2017 ANSYS. Piezoelectric Perfectly Matched Layers (PML) • Perfectly matched layers (PML) to absorb outgoing elastic waves in piezoelectric medium • Truncate infinite open domain into finite element domain • MADL commands: piezoelectric element KEYOPT(15) = 1 5 elements along PML region 63 © 2017 ANSYS. 2018 . January 17. Inc. January 17. 2018 . Solver and Elements technology 64 © 2017 ANSYS. Inc. and Lagrange multiplier) is now available Contact target (ξ𝟎 . Contact . Inc.Small Sliding Contact Small-sliding contact assumes that relatively small sliding motion (<20% contact length) between the contact and target surface Arbitrary rotations of contacting bodies are permitted.KEYOPT(18)=1 behavior has been available for several releases.18. The use of kinematic multipoint constraints (MPCs) to represent linear contact MAPDL . 2018 . January 17.η𝟎 ) (ξ𝟎 . Each contact detection point always interacts with the same target element which is determined from the initial configuration.η𝟎 ) Gap and slip are measured from the contact detection point to its original nature coordinator of intersection on target 65 © 2017 ANSYS. a general linear contact capability for all contact algorithms (penalty.2. In Rev. MPC. • 1st Load: apply pretension forces •2nd Load: Lock pretensions • 3rd – 20th load apply external forces Linear contact solving time: 490 sec 1 iteration NL solving time: 1081 sec 66 © 2017 ANSYS. 2018 . January 17. The factorized stiffness matrix can be re-used if there is no displacement constraints or CEs are added or removed in sequent load steps. Linear Contact – Small Sliding Advantages: The contact searching and is performed once in the beginning of the linear analysis. Reaction forces are always balanced comparing with the “one iteration based NL solution”. Inc. 8 million DOF. 2018 . sparse solver • Nonlinear static analysis involving contact.Small Sliding Contact • Improve contact robustness (Engine model) • 3.2: 53 equilibrium iterations • Finite sliding contact option in R18.2: 45 equilibrium iterations (Improvement is due to better estimation of the contact stiffness for gasket elements) • Small sliding contact option in R18. Contact . January 17. plasticity and gasket elements •One load step with 6 sub-steps • Finite sliding contact option in R17. Inc.2: 27 equilibrium iterations 67 © 2017 ANSYS. K KEYOPT(14)=0 KEYOPT(4)=0 Force 1 0 KEYOPT(4)=1 Traction KEYOPT(4)=2 Traction 1 1 KEYOPT(4)=3 Traction 0 1 KEYOPT(4)=4 Force KEYOPT(14)=1 KEYOPT(4)=0 Force 4 Max 0 KEYOTP(4)=1 Traction KEYOPT(4)=2 Traction 4 Max 4 Max KEYOPT(4)=3 Traction 0 4 Max KEYOPT(4)=4 Force KEYOPT(14)=2 KEYOPT(4)=0 Force 8 Max 0 KEYOTP(4)=1 Traction KEYOPT(4)=2 Traction 8 Max 8 Max KEYOPT(4)=3 Traction 0 8 Max KEYOPT(14) = 1 & KEYOPT(14) = 0 & KEYOPT(3) = 2 KEYOPT(3) = 1 KEYOTP(4)=4 Force 68 © 2017 ANSYS.Only one target segment KEYOPT(14) = 2 & KEYOPT(3) = 1 1 -. Inc.Up-to eight target segments KEYOPT(14) = 2 & KEYOPT(3) = 2 Parallel beam Crossing beam Each node I. 2018 .Up-to four target segments 2 -.J. January 17. Multiple Beams-to-Beams Contact KEYOPT(14): Multiple target segments interacting with each contact detection point 0 -. iteration 416 201 280 Max Usum 2.BEAM189 PIPE289 . Inc.11673 Max Seqv 1991. Five-filament coil inside a polymer tube Model Case1: Case2: Case3 : (solid tube-solid coils) (solid tube-beam coils) (beam tube-beam coils) SOLID186 .15 69 © 2017 ANSYS.SOLID186 DMP with NP=8 Case1 Case2 Case3 Real id # 2 contact among the coil Real id # 3 contact between the coil and tube Wall time 12153 3955 3342 Cum.117 2.47 1529.36 1566. January 17.11646 2. 2018 .BEAM189 SOLID186 . 2018 . January 17. Inc. Contact Enhancements • Power Law Debonding Model for Mixed Mode Fracture • Orthotropic Friction with Fixed Friction Coordinate System • Viscous Friction Law for Steady State Rolling 70 © 2017 ANSYS. 71 © 2017 ANSYS. January 17. Improvement of Transient Dynamics Robustness • Feature: New time integration algorithm-Backward Euler time integration – Motivation: Some non-linear problems can only achieve convergence with Backward Euler time integration due to the high numerical damping inherent in the algorithm • Feature: Set default time integration constants and solver settings and based on application – Motivation: Time integration constants and solver settings can change convergence and performance. 2018 . Inc. January 17. Inc.A snap through problem A modified version of Drill string analysis from a oil & gas customer Backward Euler time integration helps in convergence Can only converge using the new Backward Euler Time like non-linear stabilization but user does not have to Integration play to get the right “factor” Large numerical damping in the algorithm helps in convergence in non-linear buckling problems 72 © 2017 ANSYS. Backward Euler time integration Drill string analysis Rubber Foot Simulation. 2018 . January 17. Suitable for modeling homogeneous reinforcing materials 73 © 2017 ANSYS. Mesh based reinforcements • Mesh Independent Modeling with Higher Order REINF265 Elements –Supports higher order base elements. 2018 . including SOLID186. SOLID187. and SHELL281 elements giving Improved geometrical modeling and solution accuracy Fiber orientation of reinforcing elements • Full Membrane Reinforcing Stiffness –Full plane stress state supported in both 2D and 3D smeared reinforcing. Inc. January 17. Inc. 2018 . Distributed ANSYS New Features Distributed parallel version of Block Lanczos for buckling analyses Support for substructuring generation passes (including CMS) Results files can be combined during simulation Automatic optimal domain decomposition for best option for fastest solution Support for 2-D to 3-D analysis capability 74 © 2017 ANSYS. 2 350 Solver Rating .1 400 R18. Improved scaling to 3000+ cores DMP Scaling Comparison 450 R18. January 17. Inc. RHEL 7.0 300 Solder balls Mold 250 200 PCB 150 • 16 million DOF. sparse solver • Nonlinear transient analysis 100 • Linux cluster. 192GB RAM.3 • Intel Omnipath interconnect 0 128 256 512 1024 2048 4096 Number of Cores • Model courtesy of MicroConsult Engineering GmbH • Cluster data provided by Intel via the Endeavor cluster 75 © 2017 ANSYS. SSD. 2018 .(runs per day) R19. each compute node contains 2 Intel Xeon 50 Gold 6148 processors. CentOS 7. sparse solver 40 • Nonlinear static analysis involving contact and unsymmetric matrices 20 • Linux cluster. SSD.1 160 R18. each compute node contains 2 Intel Xeon Gold 6148 processors. Improved scaling for unsymmetric matrices DMP Scaling Comparison 180 R18.3 0 • Mellanox EDR Infiniband 16 32 64 128 256 512 Number of Cores • Model and data courtesy of MicroConsult Engineering GmbH 76 © 2017 ANSYS.0 120 100 ~3x speedup 80 60 • 5.2 140 Solver Rating . January 17. 2018 . Inc.(runs per day) R19. 384GB RAM.5 MDOF. I. January 17. Inc. Adding HPC keys or packs will logically increase this. 77 © 2017 ANSYS. HPC packs now work across Mechanical. HPC Licensing changes The following products: • Mechanical Enterprise (including Multiphysics bundle licenses) • Mechanical Premium • Mechanical Pro All now get 4 cores. 2018 . Fluids and Electronics products. Mechanical Premium + 1 HPC pack will enable 12 cores.e. 0 will be available in January 2018 Additional updates in • Dynamics • Contact & non linear transients • Explicit Dynamics • Topology Optimization • RBD • SMART Fracture • Linear Dynamics • Coupled Physics • External Model • Composites • Mechanical Features • MAPDL Solver • Usability • Acoustics Release highlights What’s New page within Mechanical 78 © 2017 ANSYS. 19. Inc. 2018 . January 17. R) • Furniture scattering and absorption • Frequency-dependent material properties (empty room diffusion coefficient. Inc.ATTN..α. coefficient of atmospheric attenuation. and furniture absorption coefficient) (TB..α) • Rooms coupled via partition walls with the absorption coefficients (α) and transmission loss (R) (SF..ATTN. 2018 . NSOL Coupled rooms Flat room 79 © 2017 ANSYS... January 17. furniture diffusion coefficient.AFDM. PRES/PLES. PRNS/PLNS...or frequency-dependent omnidirectional radiated sound power source (BF.ROOM) • The time.MASS) • The initial condition of the acoustic energy density (IC. Room Acoustics Room acoustics solving acoustic energy diffusion equation • Predict the sound pressure level (SPL) in large room (concert hall …) where the Helmholtz wave equation solver leads to unaffordable computational cost • The mixed frequency-dependent boundary conditions the walls of rooms with absorption coefficients (SF.ENKE) • Steady-state and transient analysis for SPL and reverberant time • MAPDL commands: acoustic element KEYOPT(1) = 3 . January 17...AVG Reference sphere Plane waves +z max Maximum incident angle scatter PML 80 © 2017 ANSYS... 2018 . The acoustic domain is isolated by the structural panel from the incident domain (mesh free) • The incident diffuse sound field that consists of thousands of planar waves with random phases and different incident angles projects onto the rigid objects and scattered • Scattered analysis of the diffuse sound field • Scattering solution analogy to the scattering analysis of a single incident planar wave. • Only total field formulation is used (the ASOL and ASCRES are invalid) • Either PML or irregular PML must be used to truncated the open domain • Average nodal result for multiple random solutions • MAPDL commands: PRNS/PLNS.PRES. Scattering Analysis of Incident Diffuse Sound Field • Analysis types regarding to the incident diffuse sound field • The incident diffuse sound field projects onto the structural panel and the vibrating panel generates the noise in open acoustic domain. Inc. . Inc. 2018 . January 17. Body Force in Convective Wave Equation • The body force is taken into account the convective wave equation (mean flow effect) • The force potential is introduced to present the body force in the convective wave equation solver • MAPDL commands: BF.UFOR 81 © 2017 ANSYS. 228 1 iteration with 0.303 Linear contact 1. January 17.9542 17. Linear Contact – Small Sliding: Bucking Analysis First Mode Second Mode MPC contact 1.95953 16. 2018 . Inc.318 NL contact 82 © 2017 ANSYS.9616 17.