Advanced Nonlinear and Detail Analysis Software Program

Advanced Nonlinear Nonlinear and and Detail Detail Analysis Analysis Software Program Advanced New Paradigm in Advanced Structural Analysis www.Mid...
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Advanced Nonlinear Nonlinear and and Detail Detail Analysis Analysis Software Program Advanced

New Paradigm in Advanced Structural Analysis

www.MidasUser.com

1

Overview

2

Geometry Modelling

3

Mesh Generation

4

Analysis

5

Post-processing

Configuration Geometry Modeller

Report Generator

Geometry modelling and clean-up

Mesh Generators

Various graphic plots and result tables

FEA

Post-processor

Auto, mapped and manual meshing

FEM Pre-processor

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FEM Solvers

Why midas FEA? Joint Detail

Concrete cracking

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Bridge Connection

Pier Deformation

Why midas FEA? Corrugated Steel-Web Bridge

Steel-Conc. Girder

Curved steel box girder Bridge Varying number of Webs or Bifurcating Webs

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Why midas FEA? Bolt connection

Local Buckling of orthotropic steel deck

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Splay saddle in suspension bridge

Bridge cross-section

Project Applications

Woon-Nam Extradosed Bridge

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Mode 1

Mode 2

Mode 8

Mode 9

Project Applications

JECHON-DODAM RAILWAY Steel Arch Bridge

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Project Applications Solid elements Modeling of Hanger Clamp (Bonny River Suspension Br.) FE Model

Stress Contour

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Project Applications Fatigue Analysis

Life Cycle Hyung Jae Grand Bridge

Damage www.MidasUser.com

Project Applications CFD Analysis

Grid around the Bridge Section

Velocity Distribution

Turbulence near the Bridge Section

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Project Applications Contact Analysis PL 268

PL 1.080

PL 397 (397)

DO

H- STIFF 1- PL- 130x10x1168

V- STIFF

V- STIFF

V- STIFF

DO

PL 312

DIAP

H- STIFF 1- PL- 130x10x1124

Deformed shapes

Gusset and web plates

Contact faces Pins www.MidasUser.com

Stress in contact faces

Framework Main Menu

Tabbed Toolbar Work Window

Works Tree Task Pane

Property Window

Table Window Output Window

Developed based-on Task-oriented Design Paradigm www.MidasUser.com

New Paradigm in Advanced Structural Analysis

www.MidasUser.com

1

Overview

2

Geometry Modeling

3

Mesh Generation

4

Analysis

5

Post-processing

Data Exchange 

Import (Geometry) • • • • •



STEP, IGES ACIS*, Parasolid* MSC.Nastran. AutoCAD DWG / DXF MIDAS MxT files

Export (Geometry) • • •

STEP, IGES, BRep MSC/NASTRAN* Midas Civil/Gen

Standards for CAD Data Exchange  STEP (STandard for the Exchange of Product Model Data)  IGES (Initial Graphics Exchange Specification)

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Data Exchange Civil, Gen

FEA

Frame Model (General Section)

MCS Format Generated Solid Geometry

Analysis Model (3D Prism Mesh)

FrameSolid Wizard automatically generates Solid Geometry & Mesh by importing Frame Model (*.MCS) from Civil and Gen. www.MidasUser.com

MIDAS Information Technology Co., Ltd.

Geometry Modelling Modeling Capabilities

Midas Civil

Midas FEA



Point

O*

O



Curve

O*

O



Surface

O*

O



Solid

O*

O



Transformation

O*

O



Boolean

Merge*

O



Feature Generator

X

O



Feature Modifier

X

O



Repair

X

O

*With limitations compared to FEA

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Advanced Modelling Generation Guide Curve

Profile

Extrude

Sweep

Profiles

Loft Extrude

Revolve Profile

Loft

Profiles

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Advanced Modelling Modification

Local Prism (Fuse: Defined Height)

Trim Surfaces

Shell Fillet

Offset www.MidasUser.com

Chamfer

New Paradigm in Advanced Structural Analysis

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1

Overview

2

Geometry Modeling

3

Mesh Generation

4

Analysis

5

Post-processing

Mesh Generation Meshing Capabilities

Midas Civil

Midas FEA



Mesh Node

O

O



Mesh Linear Elements

O

O



Mesh Planar Elements

O*

O



Mesh Solid Elements

X

O



Auto Meshing without surface generation

X

O



Protrusion and Transformation of Mesh

X

O



Remeshing

X

O



Check Mesh

X

O



Quality Assurance

X

O



Adaptive Seeding

X

O

*With limitations compared to FEA

Generated Mesh www.MidasUser.com

Automatic Solid Meshing  

FEA’s Tetra Mesher auto-generates tetrahedral solid mesh with variable sizes in smooth transition. (200,000 Tetra’s/min) FEA’s Tetra Mesher is capable of including holes, curves and points that are present in/on solids.

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Automatic Surface Meshing 

FEA provides automatic defining & meshing function which defines mesh-able domains from curves (without creating surfaces) and then generates mesh for each domain.



Automatic defining & meshing function is very useful for complex 2D models which were originally modelled in AutoCAD.

Imported DXF Model (173 Domains) www.MidasUser.com

Automatically Defined Domains & Generated Meshes

Mesh Protrusion Extrude (2D3D)

Fill (Curve2D)

Sweep (2D3D) Scaled Sweep Guide Curve

Revolve (2D3D) www.MidasUser.com

Reinforcement Elements 

Modelling Method • •

Embedded Bar (Incompatible Mesh) Truss (Compatible Mesh) + Interface (Slip, Friction)

Prism Map-Mesh

Embedded Bar (Incompatible)

Truss + Interface (Compatible)

Analysis Result

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Check & Quality Assurance 

Check & Verify • • • • •



Free Edges Free Faces Manifold Edges Non-manifold Edges Check & Align ECS Check Free Face (Unconnected Element Face)

Quality Assurance • • • • • • • •

Aspect Ratio Skew Angle Taper (2D) Warpage (2D) Jacobian Ratio Twist Collapse (Tetra) Length / Area

Twisted Penta

Collapsed Tetra (Near Zero Volume) Mesh Quality Plot

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New Paradigm in Advanced Structural Analysis

www.MidasUser.com

1

Overview

2

Geometry Modeling

3

Mesh Generation

4

Analysis

5

Post-processing

Equation Solvers  Equation Solvers 



Direct Solvers: Minimized number of calculations for simultaneous linear equations - Multi-frontal Sparse Gaussian Solver (Default) supporting 64-bit OS and GPU-accelerated solver

- Skyline Solver Iterative Solvers: Efficient handling of large scale models and specific nonlinear problems - Preconditioned Conjugate Gradient (CG) - Generalized Minimal Residual (GMRES)

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MIDAS Information Technology Co., Ltd.

Analysis Capabilities Analysis Capabilities

Midas Civil

Midas FEA



Static Analysis

O

O



Construction Stage Analysis

O

O



Moving Load Analysis (User-defined)

O

O



Modal Analysis

O

O



Linear Buckling Analysis

O

O



Transient / Spectrum Response Analysis

O

O



Time History Analysis

O

O



Material / Geometry Nonlinearity Analysis

O*

O



Interface Nonlinearity Analysis

X

O



Reinforcement Nonlinearity Analysis

X

O



Cracking Analysis

X

O



Static/Explicit Contact Analysis

X

O



Heat Transfer Analysis

X

O



Heat of Hydration Analysis

O*

O



Fatigue Analysis

X

O



Fluid Dynamics Analysis (CFD Analysis)

X

O

*With limitations compared to FEA

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Linear Static Analysis  Linear Static Analysis  Multiple Load Cases  Result Combination

Offshore Platform / Steel Frame Composed of Cylindrical Jackets (Plate + Frame)

Net Solution Times (Pentium4 3GHz, 1GB RAM) Stress Distribution of Jacket

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Eigenvalue Analysis  Modal Analysis  Lanczos Method  Subspace Iteration

 Linear Buckling Analysis  Critical Load Factors  Buckling Modes

Fig: Buckling Analysis of Steel Bridge (Global and Local) www.MidasUser.com

Dynamic Analysis  Transient Response Analysis  Direct Transient Response  Modal Transient Response  Time Forcing Function DB (54 Earthquake Acceleration Records)

 Response Spectrum Analysis  SRSS, CQC, ABS  Design Spectrum DB

Time Forcing Function www.MidasUser.com

Material Nonlinearity Analysis  Material Models      

von Mises Tresca Mohr-Coulomb Drucker-Prager Rankine User-Supplied Material

Tendon Anchorage (Solid) - von Mises www.MidasUser.com

 Nonlinear Behaviours  Hardening (Isotropic)  Softening

 Iteration Methods    

Full Newton-Raphson (Auto Load Step) Modified Newton-Raphson Arc-Length Method Initial Stiffness

Pinched Cylinder (Plate) – von Mises Material & Geometry Nonlinear Analysis

User-Supplied Materials  In FEA, users can use their own defined material models via Fortran-coded library file.  FEA’s user-supplied material model supports nonlinear elastic and elastoplastic behaviours.  User-supplied material can be used seamlessly with all elements which Strain allow material nonlinear behaviours. Input Total Stress Stiffness Matrix Output USRMAT.DLL

USM Dialogue

User-defined Parameters Input Dialogue www.MidasUser.com

Nonlinear Elastic Material for Solid Element

Geometry Nonlinearity Analysis  Methods  Updated Lagrangian  Total Lagrangian  Co-rotational

Rectangular Tube (Plate) – Co-rotational www.MidasUser.com

 Iteration Methods    

Full Newton-Raphson (Auto Load Step) Modified Newton-Raphson Arc-Length Method Initial Stiffness

Ring (Solid) – Total Lagrangian

Interface Nonlinearity Analysis  Interface Models      

Coulomb Friction Discrete Cracking Dilatancy Crack Bond-Slip Nonlinear Elastic Combined (Cracking-Shearing-Crushing)

Steel

Interface

Concrete

Deformation (Discontinuity btwn Steel & Concrete) www.MidasUser.com

Steel-Concrete Composite Girder

Principal Stress (Virtually Transformed & Clipped View)

Heat Transfer and Heat of Hydration Analysis  Visco-Elastic Models Creep-Shrinkage (Design Code) Temperature-Dependent Material

Parametric Analysis Multiple Material Sets Multiple BCs & Heat Sources Multiple Construction Sequences

Pier Table (Construction Stage) - Temperature www.MidasUser.com

 Heat Transfer Steady-State & Transient Conduction, Convection, Cooling Pipe Heat Flux Heat Flow Temperature Gradient Display

Pier Table (Construction Stage) - Stress

Static Contact Analysis Lug (90mm)

Double plate (85mm) Pin (224mm )

Contact Force

Hanger of Arch Bridge (Lug-Pin Joint)

Deformation and Stress Distribution by Contact

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Cracking Analysis  Cracking Models  Total Strain Crack  Smeared

 Results  

Crack Pattern (Crack Stress/Strain) Crack Width [Crack-Bandwidth (h)]*[Max. Principal Strain – (Max. Principal Stress/E)]



Element Status  Cracking: Partially/Fully Open, Closed, Not Yet  Plasticity: Previously Plastic, Elastic, Plastic, Critical  Contact: No Contact, Slip, Stick • Symbols at Gauss Points • Disc Normal: Opening Direction • Disc Color : Stress Magnitude • Line : Shearing Direction

Steel Reinforced Concrete Bracket www.MidasUser.com

Crack Pattern (Disc Plot)

Fluid Dynamics Analysis  CFD Models

 Discretisation Scheme

 Turbulence Models  2nd-order (Spatial, Temporal) (RANS, k-w, q-w)  Boundary Condition  Compressible Solver  Symmetric (Slip) (Preconditioning)  Far-field  Compatible with incompressible Flow  Wall, etc.  Inviscid Flow  Results  Steady/Unsteady Flow  Pressure  Velocity, Vorticity  Turbulent Kinetic Energy, Viscosity  Aerodynamic Coefficients

Turbulence near Bridge Section www.MidasUser.com

Fatigue Analysis  Methods and Parameters      

S-N Method (Stress-Life) E-N Method (Strain-Life) Load / Stress History Mean Stress Corrections Stress Concentration Factor Modifying Factors

 Calculation Objects  Boundary Nodes  Nodes of Selected Mesh Sets  All (Default)

 Results  Cycles to Fatigue Failure  Damage

S-N Curves of Fatigue Design Codes

Life Cycle Contour Plot www.MidasUser.com

Load & B.C.  Loadings • • • • • • • •

Body Force Force / Moment Mass Displacement Pressure Beam Load Pre-stress Temperature

• • • • • •

Heat Generation Heat Flux Time Forcing Function Time Varying Load Ground Acceleration Response Spectrum Function Constraint based-on CSys.

 Boundary Conditions • • • •

Constraint Multi-Point Constraint Contact Conditions Convection

Spatially Varying Pressure (Function Applied) www.MidasUser.com

Arbitrary Loading 

FEA provides arbitrary loading function which can be applied to arbitrary locations/areas regardless of node and/or element connection.

Point Load (1D, 2D, 3D)

Rectangular Pressure (2D, 3D)

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Edge Load (1D, 2D, 3D)

Circular Pressure (2D, 3D)

New Paradigm in Advanced Structural Analysis

www.MidasUser.com

1

Overview

2

Geometry Modeling

3

Mesh Generation

4

Analysis

5

Post-processing

Post-processing Result Output Capabilities

Midas Civil

Midas FEA



Contour Plot

O

O



Table Results

O

O



Excel Compatibility

O

O



Iso Surface Plot

O*

O



On Curve Diagram

O*

O



Legend Control

O*

O



Exact Deformation Shape

X

O



Clipping Plot

X

O



Mirror Plot

X

O



Vector Plot

X

O



Result Tag

X

O

*With limitations compared to FEA

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Post-processing

Contour Plot

Works Tree

MS-Excel

Result Table

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Result Graph

Exact Deformed Shape

Deformed Contour with Original Shape (Static Analysis) www.MidasUser.com

Mode Shapes (Stability Analysis)

Iso-surface Plot

Iso-Surface in Transparent Solid Geometry Capped Plot (Lower Part)

Base Iso-surface

Capped Plot (Upper Part) Multiple Iso-surfaces www.MidasUser.com

Clipping Plot

Original Plot

Multiple Clipping Planes

von Mises stress and deformation of cable www.MidasUser.com

Mirror Plot Symmetry Plane

Mirrored Contour Plot Symmetric Model

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Mirrored Deformed Shape

Vector Plot Vector Plot Option • Head Type (Both, One, None) • Constant Head Size • Constant Body Size • Color (Contour, Mono)

Vector Plot with Deformation Vector Plot with Contour

Vector Plot with Transparent Geometry www.MidasUser.com

On-Curve Diagrams

3D On-Curve Graphs on Contour Plot

Result Data at User-Specified Sampling Points

Fault Zone

2D On-Curve Graphs on Contour Plot

Front View www.MidasUser.com

Probe & Result Tag

Sectional Result with Clipped Plot (Element Result)

Nodal Result

Probe & Add Result Tags at Specified Nodes/Elements www.MidasUser.com

Legend Control 

In FEA, legend can be controlled for its position, size, format and range (including min/max value) by mouse dragging.

Drag side to resize legend box Drag scale bar to change range

Property Window (Legend Option)

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• Legend Option: - Color (Value, Ratio, Description) - Logo - Range (including Min/Max/Zero) - Format (Fixed/Scientific, Width)

User Support midas FEA On-Line System  Local Support System  Web Support System  Consulting  Training & Seminars  Fast and Accurate  User-oriented System  Useful materials

Update News: The latest updates about the program and release notes 1:1 Consulting: 24 hr consulting support by phone or e-mail Technical Documents: Various documents and papers for civil and structural engineering Download: Program, Online-manual, Tutorials and Purchase information Q&A Board: Questions and answers for program usage Features Request: Reflect user’s requests for desired functionality in future releases Training: Schedule, Registration, Contents, On-line training movies and On-line on-demand demo/training

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MIDAS Information Technology Co., Ltd.