R15.0 Structural Update

Transcription

1 R15.0 Structural Update 1 Tim Pawlak R&D Fellow ANSYS

2 Structural Update Topics Geometry and Mesh Material Behavior Numerical Methods Composites Dynamics Submodeling Multiphysics Solvers User Interface Model Assembly 2

3 Geometry and Mesh Goals: increase speed, reduce memory usage, improve robustness 3

4 Geometry Highlights Share topology faster Multi-body parts can have instances Shared topology for multibody parts new options Multi-body part Slice plane Units changeable Hot keys Sliding contact (no shared topology) 4 Shared topology

5 Meshing Highlights Faster executions Size Function and Body of Influence Methods: Patch Conforming Tet, Sweep, MultiZone, Shell Meshing Lower memory requirements New parallel parts meshing Simultaneously meshes multiple parts in an assembly on multiple CPU s Works for all part mesh methods 5

6 Meshing Speed Customer Models 6

7 Meshing Failure Handling Improved failure handling Better indication of failed mesh based on color: Out of date, Failed Edge coloring tool use to locate problem area Edge coloring indicate where problem area Out of date mesh Failed mesh 7

8 MultiZone Mesh Sizing Works with Body/Sphere of Influence (BOI/SOI) Line BOI SOI Solid BOI Support for inside out biasing 8

9 Meshing Reverse Edge Bias Option in edge sizing for biasing to reverse edge direction for selected edges 9

10 Material Behavior 10

11 Fracture Mechanics * T-stress: stress acting parallel to the crack faces now available Helps predict stability and whether the crack will deviate from the original plane R&D continues on crack growth simulation based on XFEM 11 * Stress intensity factor K and the elastic T-stress for corner cracks L.G. ZHAO, J. TONG and J. BYRNE

12 Cohesion Failure Can now simulate in Mechanical e.g. adhesive failure Two methods available Interface delamination (CZM: Cohesize Zone Material based) Contact de-bonding 12

13 Wear Modeling New functionality allowing estimation of wear due to friction Generalized Archard Wear model with parameters as a function of temperature Contact nodes are physically moved Wear Pressure 13

14 Materials Models Combine rate independent behavior of Chaboche Kinematic Hardening with rate dependent implicit creep Material Curve Fitting for Chaboche model Shape Memory Alloy support for beam elements allows for faster modeling and computation of structures Beam188 Solid185 Total Solution Time BEAM188 : SOLID185=1:4 14

15 Numerical Methods 15

16 Mesh Adaptivity Automatic mesh splitting and morphing Criteria based selections for: element distortion, mean strain energy, and contact status Load step and region specific rules can be defined 16

17 Bolt Thread Modeling Simulate without physically modeling threads as a contact setting Accuracy closer to true thread modeling than bonded MPC method and much faster True Thread Simulation Bolt Section Method MPC Method Wall Elements Time True Thread Model 115 hrs 1.1 M Bolt Section Method hrs 69K MPC Method hrs 69K 17

18 Composites 18

19 Composites Layered thermal solid composites now in Mechanical Continuum Damage Mechanics based Progressive Damage of Composites Interface delamination layer can now be defined in ACP and imported in Mechanical 19

20 VCCT Based Crack Growth Modeling Mechanical now supports the ability to model crack growth along a pre-determined path Virtual Crack Closure Technique (VCCT) used to compute energy release rate with five optional failure criterions 20

21 Thickness ACP (Composites) Performance improvements in post evaluation, save, resume Interlaminar shear and normal stress for solid composites improved Interlaminar Shear Stress in R145 Interlaminar Shear Stress in R15 Reference SHELL results R14.5 R Interlaminar Shear Stress

22 Dynamics 22

23 Linear Dynamics CMS generation for general & gyroscopic damping Large rotation super elements more accurate (CMS) comparing to full model 23

24 Forced Response for Cyclic Structures Uses Mode Superposition Harmonic (Expansion performed on-the-fly) For example: applying pressure load from CFX TBR results to MAPDL while ensuring consistency between models (e.g. axis of rotation, speed, engine order) CFX TBR 24 MAPDL

25 Linear Dynamics in Mechanical Pre-Stressed FULL Harmonic now supported (e.g. structure with gravity) Reduced results data by expanding results only at user selected frequency points Frequency Dependent Loading now supported for Pressure, Force, Moment, Acceleration, etc. Phase Angle Input for Remote Force and Moment Bearings and bearing probes in all analysis 25

26 Speed-Up Explicit Dynamics Parallel Trajectory Contact (TC) For all unstructured FE solvers With/Without erosion Including Euler-Lagrange Coupling 8,5 7,5 6,5 5,5 4,5 3,5 2,5 1,5 0, Number of slaves Implicit-Explicit Enhancement Pressure initialization for models where only final deformed geometry is known from implicit pre-stress 26

27 LS-DYNA From Within Mechanical Workbench user interface Joint project between ANSYS and LSTC Interactive pre-processing, solve, and post-processing No additional fee for existing LS-DYNA users (with current TECS) ACT extension download on ANSYS Customer Portal 27

28 Rigid Body Dynamics Improved handling of large assemblies CMS bodies (R&D) New loads Follower load FFT based loads RBD coupling with aeroelastic software Road Profile 28

29 Submodeling 29

30 Submodeling Enhancements Now available for Shell-Shell and Shell-Solid Available for ACP systems Coordinate systems used to align source and target data Validation for data transfer available 30

31 Submodeling Example: Shell to Solid Surface model 2D to 3D submodeling enables computation of locally refined results that are not captured in a larger surface model Solid model 31

32 Multiphysics 32

33 Imported Loads Can now be Time and Frequency Dependent Now includes pressure to nodes, initial stress, and initial strain (corner or element centroids) UV weighting to handle dissimilar geometries Imported loads can be duplicated 33

34 Thermal & Coupled Physics Multi-frame restart with 22X helps with transient problems having thermal-electric physics e.g. Joule Heating Linear perturbation now supported with 22X elements e.g. piezoelectric Fast thermal solver is now supported with distributed solver Image courtesy of Marlow Industries Image courtesy of Piezo Systems, Inc. 34

35 Offshore Enhancements New OCZONE command now allows for a simplified input of ocean environment boundary conditions definition ACT Extension for offshore loads and boundary conditions support in Mechanical Hydrodynamic coefficients which are part of the ocean load can now be a function of depth or Reynolds number 35

36 Aqwa Enhancements Aqwa Workbench Integration Wider meshing exposure Time domain animations with wave surface Drag linearization Increased model solution size Characteristic Limit Nodes Elements Diffracting Elements

37 Solvers 37

38 Solver Technology New subspace eigen solver supports shared and distributed parallel technology New MSUP harmonic method for unsymmetric systems (e.g. vibro-acoustics) 2.09 MDofs first 20 modes 38

39 HPC Scalability Improved Scalability of distributed solver at higher core counts Couple Acoustic, 1.2 M DOF, Full Harmonic Response First major commercial CAE provider supporting INTEL Xeon Phi Turbine Blade 2.1M DOF SOLID187 Static, nonlinear analysis One iteration Sparse solver 39

40 ARCLENGTH Improvements ARCLENGTH typically used for applications like nonlinear buckling, sheet warping Made more robust Supports MPC bonded contact Mixed shell/solid and U/P formulation elements Distributed parallel solver 40

41 Newton-Raphson Option in Mechanical Available in GUI Default (Program Controlled) is MAPDL default even when contact friction coefficient is greater than 0.2 in nonlinear Static and Transient systems Software revision behavior change Warning message is displayed Following modal analysis will correctly handle settings 41

42 User Interface 42

43 Element Selection In graphics window Element information accessible Named selection GUI or criterion based selection (type, mesh quality, location, etc.) Export selection also written into solver input as element component Results for elements Regular and user defined results 43

44 Results Visualization Can average results across bodies in a multi-body part Unaveraged Averaged New visualization options for results scoped to body or face, other bodies are hidden (default) instead of translucent R14.5 R

45 Results Summary Worksheet RMB command on solution object in addition to toolbar Table of Results available for: Regular Results, User Defined Results, Force Reactions, Moment Reactions, Spring Probe, Bolt Pre-Tension Probe, and Joint Reactions 45

46 Miscellaneous Keyboard shortcuts e.g. Ctrl+ A = Select All F9 = Hide Body Scoping to nodes e.g. Remote Forces, Remote Displacements, Joints, Springs, Beam Connections, Point Masses Compression only support Option to control stiffness behavior 46

47 Miscellaneous Higher order Thermal SHELL132 is now supported Pre-tension bolt load now allows for increment adjustment accounting for displacement from previous load step Contact worksheet now shows information on beams and springs Nonlinear spring and joint stiffness 47

48 Tree Filtering Filtering is helpful in dealing with large models with many items in the tree Tree can be filtered by boundary condition objects, connections objects, or command objects in addition to results Filtering can also be used to reduce the report to only the selected items 48

49 Model Assembly 49

50 Import Mesh Using External Model system Surfaces synthesized by angle tolerance and/or components Mesh only import Rigid transforms available Import MAPDL models (CDB files) including pre-meshed fracture models Contact detection available after import 50

51 Import Mesh Can combine External Model with Read Results Files (Mechanical used to process results) test-1.cdb 51

52 Model Assembly Combine pre-existing models Geometry, Mesh and Named Selection assembled Simulation completed on assembled model Can define transformations and copies + = 52

53 Model Assembly Allows subdivision and reassembly of models Original Assembly Upper Sub-Assembly Sub-Assembly models can be worked on independently, and later assembled Sub-Assembly models are updated separately at project level Shaft/Connector Sub-Assembly 53 Lower Sub-Assembly

54 Model Assembly Example Original model includes geometry, mesh, named selections 2 copies and rotation specified 54

55 Model Assembly Example Mesh and Geometry are exact copies in the combination 55

56 Check the Release Notes! 56

57 Check the Technology Demonstration Guide 57