Your SlideShare is downloading. ×
Caefem Solution
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Introducing the official SlideShare app

Stunning, full-screen experience for iPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Caefem Solution

943
views

Published on

CAEFEM Finite element analysis

CAEFEM Finite element analysis

Published in: Technology

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
943
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide
  • Transcript

    • 1. Concurrent Analysis Corporation
    • 2. Company Profile
      • Established in 1991.
      • CAEFEM was introduced in 1992.
      • Interfaced with FEMAP in 1992.
      • Started developing CAEFEM New Modeler in 2005.
      • Distributed through indirect dealer channel
        • (Packaged as “Sprint II” by CDA Group and “Power Solver” by Aegis Software).
      • Large and established customer base.
    • 3. Overview
      • CAEFEM is a finite element analysis software developed from scratch on Windows platform.
      • Developed in C/C++ languages
      • Offers a complete solution
        • Import of CAD geometry
        • Geometry based loads and boundary conditions
        • Automatic mesh generation
        • High speed analyses of huge models
        • Supports both linear and nonlinear analyses
        • Powerful post processing
    • 4. Object oriented design
      • State of the art event driven object oriented architecture
      • Well documented code.
      • Highly Modular.
      • Developed in C++
      • Highly reliable product.
    • 5. Huge model support
      • Handles models with millions of nodes.
      • 64 bit file addressing to handle huge databases (greater than 2 GB file sizes)
      • Support for 3 GB of addressable memory on 32 bit version.
      • Highly efficient in management of available resources.
    • 6. CAEFEM Modeler
      • User Interface
        • Fully modeless and event driven operation.
          • ability to handle many commands at the same time.
        • Resource file driven
        • Native Windows look and feel (using Qt)
        • Multiple views support for multiple models simultaneously
        • Full, Multi-level undo and redo
        • Dockable tools bars and windows
        • Command tree structure
    • 7. CAEFEM Modeler
      • User Interface
        • Multiple layers with on/off and color trigger.
        • Dynamic highlight and tracking during selection operations
        • Tracking occurs in multiple windows simultaneously
        • Units of measurement displayed in dialog boxes
        • Single dialog box to manipulate individual views and also for post-processing
        • Dynamic working planes for construction. Can be modified in the middle of a command
    • 8. CAEFEM Modeler
      • Graphics
        • OpenGL graphics
        • 3-D dynamic, pan, zoom and rotation in model views
        • 2-D dynamic pan, zoom in graph view
        • Shaded, hidden line and wire-frame display
        • Display of beams and shells with cross sections
        • Support for native Windows printing with customizable image positioning
        • Support for creating image snapshots in jpg, bmp and png formats.
    • 9. CAEFEM Modeler
      • Local languages support
        • Very easy for language localization.
          • Language dependent data is read from external resource files.
        • Both GUI and output files from analysis run share these resource files.
        • Currently CAEFEM analysis is available in Japanese language.
    • 10. CAEFEM Modeler
      • Interfaces
        • Interfaces to major CAD formats like Parasolid and ACIS
        • Interfaces to FEMAP, Nastran bulk data, GLView Post processor and TMG from MAYA heat transfer analysis .
        • API for partners to access CAEFEM database
        • Interfaces to any other products can be developed easily due to object oriented design.
    • 11. CAEFEM Modeler
      • Units of measurement
        • User can import files with different units of measurement.
        • Ability to convert the current system of units to any other system of units for both the model and results of simulation on the fly.
        • User can select combination of any of the supported units.
        • Stefan-Boltzmann constant and acceleration due to gravity are automatically assigned based on the units.
    • 12. CAEFEM Modeler
      • Mesh generation
        • Automatic mesh generation of tetrahedron, shell elements etc., from the CAD geometry.
        • Supports for both parts and assemblies
        • Controls to automatically suppress small features
        • Supports for both linear and parabolic elements
        • Ability to assign different properties to different parts of the model
        • Support for creation and modification of finite element entities with no geometry association
    • 13. CAEFEM Modeler
      • Miscellaneous
        • A comprehensive list of properties and materials
        • Extensive material library
        • User extensible material library support
        • User definable coordinate systems
        • Geometry based loads and constraints
        • Time and temperature dependencies based on user definable functions.
        • Piecewise linear and expressions of functions
    • 14. CAEFEM Modeler
      • Post processing
        • Deformed plots
        • Filled color contour plots
        • Vector plots
        • Single and multi step animation with contours
        • Sections and multiple cutting planes
        • Iso surfaces
        • Bending moment and shear force diagrams
        • Graphs with multiple curves
        • Query of nodal and elemental results
    • 15. CAEFEM Modeler
      • Customization
        • User preference file stores colors, graphics preferences and units
        • User defined material libraries
        • Extensive scripting support using the “tcl” programming language
    • 16. CAEFEM Analyses Types
      • Linear static
      • Natural frequency and Mode shapes
      • Linear buckling
      • Linear transient dynamic
      • Steady state harmonic response
      • Response Spectrum
      • Nonlinear static and transient dynamic
      • Steady state and Transient heat transfer (Linear and nonlinear)
    • 17. CAEFEM Element Library
      • Rod and Cable
      • Bar and Beam
      • Tube
      • Gap and Contact
      • Spring and DOF Spring
      • Mass (nodal), Damping
      • Rigid
      • Stiffness & Mass Matrix
      • Membrane
      • Plane stress
      • Plane strain
      • Plate (Thin and Thick)
      • Laminate
      • Axisymmetric
      • Solid, Tetra and Wedge
      Both Linear and Parabolic element types. Non-structural mass for appropriate elements Multiple topologies such as triangle, quad, tetra, wedge and brick
    • 18. CAEFEM Element Library
      • Truss elements
        • Two node elements supports only tension/compression .
        • Three translational degrees of freedom per node
      • Rod elements
        • It is a truss element with torsional degrees freedom
      • Cable elements
        • Three translational degrees of freedom per node
        • Tension only members
        • Requires a nonlinear analysis
    • 19. CAEFEM Element Library
      • Spring damper elements
        • Axial or rotational springs
        • Axial or rotational dampers
      • DOF Spring damper elements
        • Similar to Spring damper element
        • Stiffness does not depend on the nodal locations
    • 20. CAEFEM Element Library
      • Beam and bar elements
        • Both translational and rotational degrees of freedom
        • Handles tension, compression, bending and torsion
        • Supports shear correction
        • Supports nodal offsets
        • Translational and rotational releases to simulate hinge conditions
        • Unsymmetric cross sections.
        • Tapered cross sections.
        • User specified stress recovery locations
    • 21. CAEFEM Element Library
      • Tube elements
        • Similar to bar elements with circular cross section
      • Plane stress elements
        • Two translational degrees of freedom per node
        • 3 to 6 node triangles and 4 to 8 node quadrilaterals
        • Supports full, reduced and selective reduced integration
        • Supports extra shape functions (bubble functions)
        • Nodal stresses/strains are obtained by the method of least squares from the values at integration points.
    • 22. CAEFEM Element Library
      • Plane strain elements
        • Similar to plane stress elements except strains are limited to the plane of the model.
        • 3 to 6 node triangles and 4 to 8 node quadrilaterals
        • Supports full, reduced integration and bubble functions
      • Axisymmetric elements
        • Useful to model body of revolution
        • Two translational degrees of freedom per node
        • 3 to 6 node triangles and 4 to 8 node quadrilaterals
        • Supports full, reduced integration and bubble functions
    • 23. CAEFEM Element Library
      • Laminate shell elements
        • Supports up to 90 layers (can be extended very easily)
        • 3 to 6 node triangles and 4 to 8 node quadrilaterals
        • Linear elements are based on shell theory, which consists of membrane and bending parts.
        • Parabolic elements are based on Continuum theory
        • Considers shear deformation
        • User specified reference surface
        • Supports both symmetric and non symmetric laminates
    • 24. CAEFEM Element Library
      • Laminate shell elements (contd.)
        • Failure theories : Hill, Hoffman, Tsai-Wu and Max. strain and Interlayer shear failure
        • Calculates stresses and strains at top, bottom and middle surface of each layer.
        • Calculates inter laminar shear stresses
      • Shell elements
        • 3 to 6 node triangles and 4 to 8 node quadrilaterals
        • Linear elements are based on shell theory, which consists of membrane and bending parts.
        • Parabolic elements are based on Continuum theory
    • 25. CAEFEM Element Library
      • Shell elements (contd.,)
        • Supports both thin and thick (shear deformation) elements.
        • Linear elements has 6 degrees of freedom per node
        • Parabolic elements has 5 degrees of freedom per node
        • Supports Honeycomb properties
        • Handles warped quadrilateral elements
        • Stress and strain results in any user coordinate sys.
        • Stress resultants in the element/global coordinate sys.
    • 26. CAEFEM Element Library
      • Solid elements
        • 4 to 10 node tetra elements
        • 6 to 15 node wedge elements
        • 8 to 27 brick elements
        • Full, reduced and selective reduced integrations
        • Extra shape functions (Bubble functions)
    • 27. CAEFEM Element Library
      • Gap elements
        • Supports compression along the gap
        • Coulomb friction along a direction normal to gap
        • Implemented using Penalty method
        • CAEFEM automatically estimates the penalty stiffness
      • Contact elements
        • Supports contact between any types of geometry.
          • Surface to surface contact elements
          • Curve to surface and point to surface
        • Bonded contact between incompatible meshes
        • Element is defined using contact segments
    • 28. CAEFEM Element Library
      • Contact elements (Contd.,)
        • Each segment can be defined using curves, surfaces, or faces of elements
        • Based on penalty method
        • CAEFEM automatically estimates penalty stiffness.
      • Rigid elements
        • Implemented using multi-point constraints
      • Mass elements
        • Nodal mass elements
        • Supports mass and inertia values
        • Supports nodal offsets
    • 29. Loads and Boundary Conditions
      • Body Loads
      • Nodal Loads
        • Force/Moment
        • Displacement
        • Acceleration
        • Temperature
        • Heat Generation
        • Heat Flux
      • Elemental Loads
        • Beam Distributed
        • Pressure
        • Temperature
        • Heat Generation
        • Heat Flux
        • Convection
        • Radiation
      All can be attached to XY-Functions for Time or Temperature Dependence
    • 30. Solution of Equations
      • All analyses support the following solvers
        • Skyline solver
        • Sparse solver
        • Preconditioned Conjugate gradient solver
          • Handles millions of degrees of freedom
      • All solvers support automatic renumbering of nodes to reduce the matrix size
    • 31. Linear Static Analysis
      • Multi load and constraint cases.
        • Hundreds of loads and constraint sets
        • User can select any combinations of load and constraint sets.
      • Isotropic and orthotropic properties
      • Thermal stress calculation
    • 32. Frequency & Buckling Analyses
      • Default eigen value method based on model size.
      • Jacobi, Subspace, Lanczos and Inverse Iterations
      • Calculates modes in the range of interest.
      • Rigid body modes calculation
      • User specified frequency shift
      • Mode participation factors
    • 33. Frequency & Buckling Analyses
      • Sturm sequence check
      • Orthogonality check
      • Lumped, special lumped and consistent mass matrices
      • Stress stiffening
      • Reaction forces, element results
    • 34. Linear Transient Dynamic Analysis
      • Direct time integration.
        • New mark beta method
        • Rayleigh damping
        • Structural damping
        • Spring/Damper element
    • 35. Linear Transient Dynamic Analysis
      • Mode superposition method.
        • Automatic calculation of normal modes.
        • Ability to select all mode extraction options.
        • Rayleigh damping
        • Structural damping
        • Modal damping
          • Damping factor vs mode number
          • Damping factor vs frequency
          • Structural damping vs frequency
          • Quality factor vs frequency
    • 36. Linear Transient Dynamic Analysis
      • Constant initial conditions.
      • Initial conditions can be selected from a load set.
      • Lumped, special lumped and consistent mass matrices
    • 37. Harmonic (frequency) Response
      • Mode superposition method
        • Automatic calculation of normal modes.
        • Ability to select all mode extraction options.
      • Frequency dependent magnitude and phase
      • Rayleigh, Structural and Modal dampings
      • Frequency dependent damping factor, structural damping, quality factor and mode number.
    • 38. Harmonic (frequency) Response
      • Response at user selectable frequencies
      • Manual spacing
        • start end increment
      • Automatic spacing
        • Number of frequencies per mode
        • Frequency band spread (+/-) %
      • Using a function
        • X values specify the required frequencies
    • 39. Response Spectrum
      • Single point excitation
      • Displacement, velocity, acceleration and force spectrums. Also considers rocking spectrum.
      • Base excitation
      • Absolute sum, double sum, grouping, naval research lab and SRSS mode combinations.
      • Supports linear or logarithmic frequency functions
    • 40. Response Spectrum
      • Mode superposition method
        • Automatic calculation of normal modes.
        • Ability to select all mode extraction options.
      • Rayleigh, Structural and Modal dampings
      • Frequency dependent damping factor, structural damping, quality factor and mode number.
    • 41. Damping
      • Viscous damping
        • Spring damper element (for direct integration)
      • Structural damping
        • Rayleigh damping
          • Damping = α M + β K
        • Overall structural damping ( g )
          • Damping = ( g / W3 ) K
            • W3 = Equivalent viscous damping conversion
    • 42. Modal Damping
      • Frequency dependent modal damping
        • Damping factor ζ
        • Structural damping ( 2 * ζ )
        • Quality factor ( 0.5 / ζ )
      • Mode number dependent damping factor
    • 43. Nonlinear Structural Analysis
      • Large Deflections
        • Updated, Total Lagrangian and
          • Co-Rotational formulations
      • Material Nonlinearity
        • von Mises isotropic and kinematic hardenings
        • Bilinear and user specified stress/strain curve
        • Mooney Rivlin hyper-elastic model
        • Drucker Prager and Mohr-Coulomb soil models
      • Contact
        • Gap elements (including friction)
        • Surface to surface contact elements
    • 44. Nonlinear Structural Analysis
      • Regular and modified Newton Raphson
      • Line search for faster convergence
      • Convergence checks on displacements, energy and forces
      • Loads and constraints in any user specified coordinate system
      • Deformation dependent pressure load
    • 45. Automatic time stepping
      • Available for Nonlinear static analysis
      • Starts with a user specified time step
      • Automatically adjusts time step based on the convergence
      • Many options are available to speed up the convergence
    • 46. Large Deflections of Beams
      • Example:
      • A straight cantilever modeled by 5 beam elements with a tip moment
      • It deforms into a complete circle in just 4 time steps
    • 47. Restart of an analysis
      • Restart of the analysis from any previous time or time step.
      • CAEFEM automatically prompts you for a restart if solution exists at the current time.
      • Select ending and incremental times and choose any other required options.
      • If solution at a requested restart time does not exist, CAEFEM automatically interpolates the data.
    • 48. Heat Transfer Analysis
      • Linear and nonlinear (Materially nonlinear or radiation)
      • Automatic detection of nonlinearities
      • Steady state and transient
      • Time and temperature dependent loads and boundary conditions
    • 49. Heat Transfer Analysis
      • Heat flow, heat generation, convection and radiation loads
      • Steady state solution as one of the initial conditions for transient analysis
      • Lumped and consistent heat capacity
    • 50. Heat Transfer Analysis
      • Phase change effects
      • Regular and modified Newton Raphson
      • Line search for faster convergence
      • Euler backward scheme for transient heat transfer
      • Convergence checks on temperature and heat flow
    • 51. Thermal Stress Analysis
      • Automatic transfer of results to structural analyses to find thermal stresses
      • Ability to select temperatures from:
        • Any load set
        • Existing thermal results step
        • Corresponding thermal results step
        • Corresponding thermal results time
        • From a TMG (MAYA heat transfer) results file
    • 52. Bonded Contact Analysis
      • Bonded contact between incompatible meshes
      • Supports all analyses types
        • Linear Statics
        • Frequency and Buckling
        • Linear transient dynamics
        • Steady state harmonic response
        • Response Spectrum
        • Nonlinear statics and dynamics
        • Steady state and transient heat transfer
      Cantilever with incompatible tetrahedral meshes Close up view
    • 53. Results
      • Displacements and Reaction Forces
      • Velocities and Accelerations
      • Temperatures and Heat Flow
      • Stresses and Strains at Nodes and at Element Integration Points
      • Elastic and Plastic Strains at Element Nodes and Integration Points
      • Eigen Values and Mode Shapes
    • 54. CAEFEM Quality Assurance
      • Efficient quality assurance process in place. Verified with many NAEFMS benchmark problems.
      • Completely automatic verification process. It checks many types of results data like displacements, stresses, strains, reactions, at nodes, integration points etc.,
      • Over 1000 internal verification problems.
      • Statistics for solution time and results comparison with other solvers.
      • Batch process to compare the results of these verification problems
    • 55. Disk space management
      • Reduce the amount of information to be written to ASCII output file by selecting Print Options.
      • For multi time step analysis, save information for only those time steps of importance. (in Print Options)
      • Use Start/end/inc format to specify a list of time steps.
    • 56. Case Study (MGM Lion Statue)
      • Analysis of a bronze lion at
      • the entrance to the MGM Grand Hotel
      • Largest bronze statue in the United States
      • 14 meters tall ( 21 meters tall including the pedestal) and 40 000 Kg weight
      • Digitally scanned a small scaled model
      • Converted to STL file and imported into FEMAP for mesh generation
      • Analyzed using CAEFEM
    • 57. Case Study (Daytona Fabcar)
      • The Daytona Prototype built by FABCAR, demonstrated flawless performance during its maiden win in the Nextel Grand Prix of Miami in March 2003.
      • Designed in Solid Edge and analyzed suspension and roll bar using CAEFEM by Fin-el, LLC.
    • 58. Case Study (Cicero Dental Crown)
      • Cicero Dental Systems, Hoorn, Netherlands use CAEFEM to perform the stress analysis of ceramic dental crowns subjected to chewing forces.
    • 59. Bonded Contact Analysis
      • Bonded contact analysis of a pipe attached to a block
      Solid Model Finite Element Model Close up view
    • 60. Solution of a large problem
      • Pentium 4, 2.54GHz , 2GB RAM
      • Nodes: 1,002,288 nodes
      • Elements: 631,327 elements
      • Linear Static Analysis
      • Degrees of freedom: 2,976,792
      • Solution time: 8 minutes
    • 61.
      • Pentium 4, 2.54GHz, 2.0 GB RAM
      • 32 bit version
      • Nodes: 2,734,075
      • Elements: 1,623,284
      • Linear Static Analysis
      • Degrees of freedom: 8,080,935
      • Solution time: 69 minutes
      • Steady state heat transfer analysis
      • Degrees of freedom: 2,734,075
      • Solution time: 23 minutes
      Solution of a large problem
    • 62. Solution of a large problem Section plot
    • 63. Large Frequency Analysis
      • Pentium 4, 2.54GHz, 2GB RAM
      • 32 bit version
      • Nodes: 1,594,735
      • Elements: 939,587
      • Natural frequency and Mode shapes
      • Degrees of freedom: 4,781,745
      • Number of Modes: 8
      • Solution time : 62 minutes
    • 64. Large Thermal Analysis Five million nodes
      • Pentium 4, 2.54GHz, 2.0 GB RAM
      • 32 bit version
      • Nodes: 4,903,028
      • Elements: 3,285,538
      • Steady state heat transfer analysis
      • Solution time: 118 minutes
    • 65. Huge static analysis Thirteen million nodes
      • Intel Xeon CPU 5130 @ 2.0 G Hz, 8.0 GB RAM
      • 64 bit version
      • Nodes: 13, 294, 565
      • Elements: 9, 428, 996
      • DOF: 39, 785, 163
      • Solution time: 3 Hrs 42 Min
      Stress vector plot
    • 66. Huge frequency analysis Two thousand modes
      • Natural frequency analysis of a simply supported plate
      • Intel Xeon CPU 5130 @ 2.0 G Hz, 8.0 GB RAM
      • 64 bit version
      • Number of modes: 2000
      • Error in 2000 th frequency: 5.5 %
      • Solution time: 1 Hr 33 Min
      20 th Mode shape
    • 67. User comments
      • CAEFEM is much faster than the competition.
      • CAEFEM is flexible and very easy to use.
      • CAEFEM handles analyses of huge models very efficiently.
      • CAEFEM is bullet proof.
    • 68. Some of the Future Developments
      • Linux and UNIX versions
      • Solid modeling support
      • Improved support for surface to surface contact elements.
      • Enhanced nonlinear material models.
      • Support for transparency in 3D plots
      • Support for Python and Visual Basic scripting
      • Support for distributed analysis execution with support for parallel computer architectures.
      • Web centric interface for remote monitoring of analysis runs.