Marc 技術仕様
Finite Element Library
Marc has over 180 elements that are available for structural, thermal, electrical, electrostatic, magnetostatic, electromagnetic, acoustic, bearing, diffusion, and fluid analysis. These elements are state-of-the-art, robust, accurate, and can handle large displacements, large rotations, and finite strains.
- Cable, Truss, Beam
- Plane Stress and Strain
- Generalized Plane Strain
- Axisymmetric
- Plate, Membrane, Shell
- Large Rotation, Reduced Integration Shell
- 3-D Solid
- Incompressible
- Rebars (Continuum and Membrane)
- User-Defined Elements
- Special Elements
- Gaps
- Pipe-Bend
- Elbow
- Rigid
- Gasket
- Semi-Infinite
- Shear Panel
- Composite (Shell, Solids)
- Cavity (2-D, 3-D, Axisymmetric Surfaces)
- 3-D Current Carrying Wire for Magnetostatics
Material Models
Marc has an extensive library of metallic and non-metallic material models, which allows the representation of virtually any material ranging from simple linear elastic materials to complex time- and temperature-dependent materials.
- Linear-Elastic
- Isotropic, Orthotropic, and Anisotropic (Temperature-Dependent)
- Elastic-Plastic
- Isotropic, Kinematic, or Combined Hardening
- von Mises Yield Criterion
- Drucker-Prager Yield Criterion
- Oak Ridge National Laboratory Model
- Analytical Hardening Behavior Models (Additive Power Law, Cowper-Symonds, Multiplicative Power Law, Kumar, and Johnson-Cook)
- Strain-Rate Effects
- Hill's Anisotropic Plasticity
- Barlat Anisotropic Plasticity
- Temperature-Dependent Properties
- Gurson Damage Model for Metal Plasticity
- Chaboche Viscoplastic Model
- Finite Strain (Additive Decomposition or Multiplicative Decomposition [FeFp])
- Forming Limit Data for Sheet Forming Limit Diagrams
- Grain Size Prediction
- Elastomers
- Large-Strain Viscoelastic Model
- Nonlinear Elastic in Total or Updated Lagrange Framework
- Generalized Mooney-Rivlin Model
- Ogden Model
- Boyce-Arruda Model
- Gent Model
- Foam Model (Large-Strain Compressible)
- Elastomer Damage and Fatigue
- Hypoelastic
- Rigid-Plastic Flow
- Fast Sheet Metal Forming Analysis
- Plane Stress Option
- Super Plastic Forming Simulation
- Creep
- Deviatoric or Volumetric Strains
- Volumetric Swelling
- Piecewise-Linear or Exponential Rate of Equivalent Creep Strain
- Temperature Dependent
- ORNL Model (Combines Creep, Plasticity, and Cyclic Loadings)
- Implicit Creep With Plasticity
- Viscoelasticity
- Maxwell and Kelvin Models
- Hereditary Integrals Formulation for Small and Large Strains
- Thermo-Rheologically Simple Behavior
- Narayanaswamy Viscoelastic Thermal Expansion
- Isotropic and Anisotropic Materials
- Viscoplasticity
- Combined Plasticity and Maxwell Creep Mode
- Powder Metallurgy
- Viscoplastic Model of Powder Materials
- Hot Isostatic Pressing Process
- Temperature and Density Changes
- Shape Memory
- Saeedvafa and Asaro Model
- Auricchio Model
- Conversion between Saeedvafa/Asaro and Auricchio Models
- Composites
- Laminated Plates, Shells, and Solids
- Elastic-Plastic Behavior
- Arbitrary Material Orientations
- Relative Ply Angle for Each Layer
- Multiple Failure Criteria (Maximum Stress, Maximum Strain, Tsai-Wu, Hill, Hoffman, or User-Defined)
- Progressive Failure
- Heat Transfer Analysis
- Gasket Material for Thermo-Mechanical Analysis
- Soils and Poro-Plasticity
- Yield Surfaces as a Function of Hydrostatic Stress
- Linear or Parabolic Mohr-Coulomb Law
- Fully-Coupled Fluid-Solid Soil Problem
- Modified Cam-Clay Model
- Concrete
- Low-Tension, Cracking, Crushing Surfaces
- Piezoelectric
- Magnetostatics
- Nonlinear B-H Relation
- Permanent Magnets
- Rebars
- Micro-Buckling Behavior for Rebar Elements
Table Input
This new capability allows for a completely new way of controlling the load and initial and boundary condition history, as well as defining material properties, in Marc. Table Input is available in Marc, Marc Mentat, and Patran.
- May be Applied to Load, Initial, and Boundary Conditions
- Surface-Dependent Pressure Loads
- Motion of Rigid Contact Bodies
- Time-Dependent Point Loads
- Variable Spring Constants
- Variable Weld Heat Source Velocity
- May be Applied to Virtually All Material Properties
- Up to Four Simultaneous Independent Variables
- Over 50 Independent Variable Types
- Original or Deformed Coordinates
- Time, Frequency, Increment
- Pressure, Temperature, Stress, Strain
- May be Defined by a Mathematical Equation
- Table Data or Equation Evaluated Directly During Solution
Analysis Boundary Conditions
- Mechanical
- Thermal
- Joule
- Acoustic
- Electrostatic
- Magnetostatic
- Electromagnetic
- Fluid
- Bearing
- Diffusion
- State Variables
- Geometrically Applied Boundary Conditions
- General Section Constraint for Bolt Modeling
- Pre-State
- Transfer Axisymmetric to 3-D
- Transfer 2-D Plane Strain to 3-D
- Transfer 2-D Generalized Plane Strain to 3-D
- Nodal Transformation
- Links
- Nodal Ties
- Servo Links
- Spring/Dashpots
- RBE2
- Large Rotation RBE3 Constraints
- Inserts
- Global-to-Local Zooming
- 2-D Solid 2-D Solid
- 3-D Solid 3-D Solid
- 3-D Shell/Membrane 3-D Shell/Membrane
- 3-D Shell/Membrane 3-D Solid
- Welding
- Control of Weld Path
- Control of Fill Material
- Machining
- Elements Removed via CAD/NC Data
- Automatic Remeshing/Deactivation of Elements in Cutter Path
- Pre-State for Initial Stress Conditions (Residual Stresses)
- Visualization of the Machining Process Results
- Contact
- 2-D and 3-D Contact
- Discrete or Analytical Rigid Contact Surfaces
- Continuous Normals Using Spline and Coons Surfaces
- Optimized Contact Detection
- Ability to Use Higher-Order Elements
- Beam-to-Beam Contact
- Cyclic Symmetry
- Load/Velocity/Position-Controlled Rigid Bodies
- Friction Models (Coulomb, Shear, and User-Defined)
- Arctangent, Stick-Slip Friction Models
- Bilinear Friction Model
- Interference-Fit Calculations
- Dynamic Impact
- Stress-Free Initial Contact
- Thermal Contact
- Near Thermal Contact Allows for Both Convection and Radiation
- Possible with Transformed Nodes
- Electrostatic-Structural
- Diffusion
- Radiation
- Adding/Changing Rigid Surfaces During Analysis
SOLUTION METHODS
Marc uses the latest proven numerical analysis techniques with all calculations performed in double precision for maximum accuracy. Optimization procedures substantially reduce memory requirements and improve computational performance for linear and nonlinear problems.
- Linear
- Superposition of Load Cases
- Fourier (Asymmetric) Analysis of Axisymmetric Bodies, including Shells
- Nonlinear
- Adaptive Load/Time Control (Static, Post-Buckling, Dynamic, Creep, and Heat Transfer)
- AUTO STEP Capabilities:
- Convergence Automation
- Automatic Time-Step Reduction
- Arc-Length Methods
- User-Controlled Load/Time-Stepping
- Automatic Damping for Stability
- Large Deformation and Finite Strain
- Total and Updated Lagrange Procedure
- Buckling (Linear and Nonlinear)
- Creep Buckling
- Post-Buckling with Adaptive Load-Step
- Perturbation Buckling
- Finite Strain Plasticity
- Global Adaptive Meshing
- 2-D (Lower-Order Quad and Tri) Automatic Remeshing
- 3-D (Lower-Order Tetrahedral)
- Remeshing Criteria Based on Increments, Penetration, Element Distortion, or Instructed Request
- Adaptive Refinement Based on Curvature
- Advanced Meshing Technology Including Overlay, Advancing Front, and Delauney Triangulation
- Remeshing of Multiple Deformable Bodies
- Local Adaptive Meshing
- Linear and Nonlinear Analysis
- Choice of Multiple Adaptive Criteria
- Special Capability for Contact Analysis
- Structural and Heat Transfer Analysis
- Mesh Refinement and Mesh Consolidation
- Dynamics
- Eigenvalue Extraction (Inverse Power Sweep and Lanczos)
- Transient Response
- Modal Superposition
- Direct Integration:
- Generalized Newmark Operator
- Houbolt Operator
- Single-Step Houbolt Operator
- Explicit Dynamics (Central Difference Operator)
- Harmonic Response
- Spectrum Response
- Time-Stepping (Fixed or Adaptive)
- Consistent or Lumped Mass Matrix
- Interface to MSC.ADAMS via Creation of MNF both Linear and Pre-Stress Analysis
- Heat Transfer
- Steady-State and Transient
- Conduction (Linear and Nonlinear)
- Convection (Radiation Boundary Conditions)
- Latent Heat and Phase Changes
- Adaptive Time Steps
- Radiation View Factors for 2-D, Axisymmetric, and 3-D Cavities
- Monte Carlo Method Computed by Marc Mentat
- Hemi-Cube Projection Method Computed by Marc
- 2-D Planar, Axisymmetric, Shells, 3-D Solids
- Global Remeshing and Adaptive Meshing in 2-D
- View Factor Magnitudes can be Visualized
- Thermo-Mechanical
- Quasi-Coupled, Thermally-Driven Stress Analysis
- Fully-Coupled Thermo-Mechanical Analysis
- Heat Generated by Plastic Deformation and Friction Effects
- Large Displacement Effects on Thermal Boundary Conditions
- Fracture Mechanics
- Linear and Nonlinear
- Brittle and Ductile Models
- J-Integral (Static and Dynamic Calculations)
- Steady-State Tire Analysis
- Fluid Analysis
- Navier-Stokes Equations in 3-D
- Mixed Method or Penalty Approach to Satisfy Incompressibility
- Newtonian or Non-Newtonian Fluid
- Fluid-Thermal Coupled Analysis
- Fluid-Solid Coupled Analysis
- Fluid-Thermal-Solid Coupled Analysis
- Hydrodynamic Bearing
- Lubrication Problems
- Pressure Distribution and Mass Flow
- Acoustics
- Rigid Reflecting Boundaries
- Eigenvalue and Transient Analysis
- Coupled Deformable Structural-Acoustic Analysis
- Joule Heating
- Coupled Electric Flow with Heat Transfer
- Coupled Electrical-Thermal-Mechanical Analysis
- Diffusion Simulation
- Electrostatics
- 2-D and 3-D Scalar Potential
- Electrostatic-Structural Coupling
- Magnetostatics 2-D and 3-D Vector Potential
- Nonlinear B-H Relations
- Permanent Magnets
- Piezoelectric Analysis
- 2-D and 3-D Modal, Harmonic, or Transient Response
- Electromagnetics
- Fully-Coupled Maxwell Equations
- Harmonic and Transient Analysis
- Computational
- Efficient Direct and Iterative Solvers
- In-Core and Out-of-Core Capabilities
- Restart
- Parallel Processing
- Available for Most Analyses
- Domain Decomposition in Preprocessor (Marc Mentat or Patran)
- Single Input File (Domains Decomposed in Marc)
- Available for Local Adaptive Meshing
USER SUBROUTINES
This powerful feature enables the user to run customized subroutines in place of the pre-existing ones in Marc, providing the user with wider latitude for solving nonstandard problems.
- User-Defined Elements
- Material Behavior
- Boundary Conditions
- State Variables
- Geometric Modifications
- Input/Output Modifications
PRE- AND POSTPROCESSING WITH Marc® MENTAT®
Marc® Mentat® is tightly integrated with Marc to facilitate preprocessing, postprocessing, and analysis submission and control.
- CAD Import
- Geometry Model Creation
- Mesh Generation
- Material Definition
- Modeling Tools
- Transformations
- Cavities
- Matching Boundaries (Bolts)
- Chains
- Sink Point Groups
- Streamline Regions
- Fracture Mechanics
- Welding (Paths & Fillers)
- Contact Body Definition
- Links
- Initial Conditions
- Boundary Conditions
- Mesh Adaptivity
- Global Remeshing
- Local Adaptive Meshing
- Analysis Job Initiation, Monitoring, and Control
- Results Visualization and Postprocessing
USER DOCUMENTATION
Users have instantaneous access to the extensive Marc online documentation, which includes hyperlinks between topics, a search engine, and detailed illustrations and examples.
- Marc User's Guide
- Installation Guide
- Release Guide
- Python Tutorial and Reference Manual
- Volume A: Theory and User Information
- Volume B: Element Library
- Volume C: Program Input
- Volume D: User Subroutines and Special Routines
- Volume E: Demonstration Problems
- Part I: Linear
- Part II: Plasticity and Creep, Large Displacement
- Part III: Heat Transfer, Dynamics
- Part IV: Fluids, Design Sensitivity & Optimization, NAFEMS
HARDWARE PLATFORM SUPPORT
Marc routinely solves large, computationally intensive problems by taking advantage of parallel processing architectures and other hardware platform improvements to achieve highly scalable, linear speed improvements on dedicated machines. Marc is supported on shared and distributed memory machines and workstation clusters running under a variety of UNIX, Windows NT, and Linux operating systems.
- AMD Opteron (64-Bit)
- HP PA-RISC (64-Bit)
- HP Alpha (64-Bit)
- IBM AIX (32-Bit, 64-Bit)
- Intel Pentium
- Intel Itanium 2
- SGI MIPS (32-Bit, 64-Bit)
- Sun UltraSPARC II, III
USER TRAINING AND TECHNICAL SUPPORT
MSC Software offers a variety of technical support resources, including training, hotline support, software and documentation updates, and consulting services. For more information, please visit:
http://www.mscsoftware.com/support/prod_support/marc
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