MIDAS FEA Mannual

Advanced Nonlinear and Detail Analysis Program Advanced Nonlinear and Detail Analysis Software

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Overview

Geometry Modelling

Analysis

1

2

4

Mesh Generation 3

Post-processing 5

New Paradigm in Advanced Structural Analysis

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Configuration

Report Generator Geometry Modeller

Post-processor

FEM Solvers

Mesh Generators

FEM Pre-processor

FEA

Geometry modelling and clean-up

Auto, mapped and manual meshing

Various graphic plots and result tables

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Analysis Capabilities Static Analysis

Construction Stage Analysis

Moving Load Analysis (User-defined)

Modal Analysis

Linear Buckling Analysis

Transient / Spectrum Response Analysis

Time History Analysis

Material / Geometry Nonlinearity Analysis

Interface Nonlinearity Analysis

Reinforcement Analysis

Cracking Analysis

Static/Implicit Contact Analysis

Heat Transfer Analysis

Heat of Hydration Analysis

Fatigue Analysis

Fluid Dynamics Analysis (CFD Analysis)

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Applicable Problems

General detail FE analysis (linear static/dynamic analysis of concrete and steel)

Buckling analysis of steel structure with material and geometric nonlinearity

Detail analysis of composite structure (steel + concrete)

Thermal analysis and differential shrinkage analysis of steel-concrete composite

girder, concrete filled steel tube and core of the SRC pier, etc.

3D detail analysis considering steel, concrete and reinforcement simultaneously

Detail analysis of CFT (Concrete Filled Tube) Columns and analysis of the long-

term behaviour (differential settlement)

Crack initiation and propagation in concrete structure

Discrete modelling and analysis of masonry

Composite modelling and analysis of wall in shear

Detail analysis for tendon anchorage

General Detail Analysis (Linear, Material/Geometry Nonlinear)

Concrete, Interface and Reinforcement Nonlinear Analysis

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Applicable Problems

Analysis of heat of hydration (general, special, nonlinear)

Detail analysis for assessment of shear capacity of pavement (Debonding Failure)

Analysis of thermal effect due to the asphalt pavement (Guss Asphalt)

Fire effect on a reinforced concrete slab

Evaluation of residual stress and integrity of welded part

Crack and fatigue analysis of the surface of structures

Life-cycle prediction of steel bridges

Fluid dynamics analysis of bridges

Staggered fluid-structure interaction analysis

High-end detail analysis

Thermo-Elastic Analysis (Heat Transfer, Heat of Hydration)

Special Analysis (Fatigue, Contact, etc.)

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Framework

Work Window

Output

Window

Property

Window

Works Tree

Main Menu Tabbed

Toolbar

Developed based-on Task-oriented Design Paradigm

Task

Pane

Table

Window

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Overview

Analysis

1

4

Geometry Modelling 2

Mesh Generation 3

Post-processing 5


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Data Exchange Import (Geometry)

STEP, IGES

ACIS*, Parasolid*

SolidWorks*, Inventor*, etc.

AutoCAD DWG / DXF

MIDAS MxT files

* marked CAD interfaces are optional.

Export (Geometry)

STEP, IGES, BRep

MSC/NASTRAN*

Imported CAD Geometry

Generated Mesh

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

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Advanced modelling functions support both top-down and bottom-up approaches in surface & solid modelling.

Geometry Modelling

Curve Surface Solid Advanced

Modelling

Line, Polyline Arc, Circle Polygon B-Spline Tunnel Section Fillet, Chamfer Trim, Extend Intersect Offset, Tangent Break, Merge

Plane Patch Coons Patch NURBS Patch Grid Patch Vertex Patch Fillet, Chamfer Sew, Fuse Trim, Divide Extend Imprint

Box, Wedge Cylinder, Cone Sphere, Torus Trim, Divide Embed Boolean Op. (Fuse, Cut, ) Stitch Surfaces

Extrude Revolve Loft Sweep Fillet, Chamfer Offset, Draft Shelling Local Prism Check, Repair Transform

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Curve Modelling

Line Arc Circle Ellipse Parabola Hyperbola

B-Spline Polyline Rectangle Polygon Profile Tunnel

Generation

On-Surface Curve Shortest Path Line Surface Intersection Offset Curve Extrude Vertex Tangent Line

Fillet / Chamfer Trim / Extend Merge / Break Intersect Align, Coincide Make Wire

Modification

Arc

Profile (Polyline+Tangent Arc) Circle

Polyline

Line

Tunnel Section

Surface Intersection

B-Spline

Imported DXF

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Surface Modelling

Virtual Grid (M X N)

Elevation

Grid Patch

NURBS Patch

Arbitrary Curves (Boundary/Tangent/Internal)

2~4 Curves

Coons Patch

Co-planar Curves

Plane Patch Vertex Patch

Vertex Cloud

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Solid Modelling

Trim

Divide

Boolean Operation

Stitch to Solid (Face Solid)

A B

Fuse (A B)

Cut (A - B)

Embed (A - B) + (A B)

+

Boolean Common (A B) operation is also provided.

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Advanced Modelling

Generation

Revolve

Profile Loft

Profiles

Loft Extrude

Sweep

Profiles

Guide Curve

Profile Extrude

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Advanced Modelling

Modification

Shell

Local Prism (Fuse: Defined Height)

Offset Chamfer

Fillet

Trim Surfaces

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Frame Solid Wizard

FEA Civil, Gen

Frame Model

(General Section) Generated Solid Geometry

Analysis Model

(3D Prism Mesh)

FrameSolid Wizard automatically generates Solid Geometry & Mesh

by importing Frame Model (*.MCS) from Civil and Gen.

MCS Format

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Graphic Display - Geometry

Shading with Edge

Transparency

Wireframe

Shading + Transparency

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Geometry Modelling

Mesh Generation

2

3

Analysis 4

Post-processing 5

Overview 1


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Mesh Generation

Auto Map Protrude Manipulation

Solid Surface Edge Planar Area 4-Curve Area 2D 3D

Quadrilateral Triangle Combined

Solid Surface k-Curve Area k-Face Volume 4-Node Area

Extrude Revolve Project Fill Sweep

Geometry Element Node

Create Extract Connection Change Para. Smooth Divide Check Quality Merge Transform

Object

Type

Various of methods for generating Reinforcements and Interface Elements are provided. (auto & manual)

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Mesh Generation

2D Quadrilateral Mesh

3D Hexahedral Mesh

3D Tetrahedral Mesh

1D Linear Mesh

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Automatic Surface Meshing

Regularity

Uniformity

Boundary Sensitive

Orientation Insensitive

Sizing Control

(< 1/2)

Internal Curve/Point

Loop Mesher

Grid Mesher

Delaunay Mesher

Grid Mesher

(Quad+Tria)

Loop Mesher

(Full Quad)

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FEA provides a number of modelling and meshing functions for non-manifold surface models.

Non-manifold

Connections Non-manifold Edge

Free Edge

Check Mesh

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Imported DXF Model

(173 Domains) Automatically Defined Domains

& Generated Meshes

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.

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Automatic Solid Meshing

FEAs Tetra Mesher auto-generates tetrahedral solid mesh with variable sizes in smooth transition. (200,000 Tetras/min)

FEAs Tetra Mesher is capable of including holes, curves and points that are present in/on solids.

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Mapped Mesh Generation

FEAs Map Mesher generates structured (regular & orthogonal) mesh both on surfaces and in solids.

Connection Part

k-sided Areas

(Simply-connected)

Pipe Junction

Cargo Carrier

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Mapped Solid Meshing

FEAs Solid Map Mesher generates hexa and/or penta mesh in simple solids by full mapping or combination (auto+map).

Full Mapping

(3D)

Lug-Pin

Joint Pier (Pipe + Reinforcement Steel + Concrete)

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Size Control

FEA provides various size control methods and adaptive seeding function based on user-specified mesh size and geometric characteristics.

L

h

Angle Ratio: sin

Deflection Ratio: h/L

Adaptive Seeding

Linear & Symmetric Seeding

Fine Coarse Coarse

Smooth Transition

Biased Seeding

& Mapped Mesh

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Mesh Protrusion

Extrude thru Node Sequence (Curve2D)

Simulate

Section

Extrude (2D3D)

Fill (Curve2D)

Revolve (2D3D)

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Mesh Protrusion

Fill (2D3D)

Top Bottom

Same Topology

Offset

(2D3D)

Sweep

(2D3D)

Guide Curve

Scaled Sweep

Project (Curve3D)

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Virtual Mesh Transformation

Virtual Transformation (Translation, Rotation, Scaling)

by Mouse Dragging Transformation

Control Box

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Element Libraries

Category Elements Order Remark

Structural

1D Truss (Gap / Hook) 1st Total Lagrangian

Beam 1st Total Lagrangian

2D

Plane Stress (Qaud / Tria) 1st, 2nd Total Lagrangian

Plane Strain (Quad / Tria) 1st, 2nd Total Lagrangian

Axisymmetry (Quad / Tria) 1st, 2nd Total Lagrangian

Plate (Quad / Tria) 1st, 2nd Total Lagrangian

Shell (Quad / Tria) 1st, 2nd Total Lagrangian

3D Brick / Wedge / Tetra 1st, 2nd Total Lagrangian

Nonstructural

Connection General Link - -

Rigid Link - -

Mass

Spring

Point - -

Matrix - -

Interface

3D Point - -

2D 1st, 2nd -

3D (Quad / Tria) 1st, 2nd -

Reinforcement Embedded Bar 1st, 2nd -

Embedded Grid (Quad / Tria) 1st, 2nd -

Heat Transfer 1D, 2D, 3D, Cooling Pipe, Thermal Link 1st, 2nd -

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Reinforcement Elements

Modelling Method

Embedded Bar (Incompatible Mesh)

Truss (Compatible Mesh) + Interface (Slip, Friction)

Truss + Interface (Compatible)

Prism Map-Mesh

Embedded Bar (Incompatible)

Analysis Result

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Check & Quality Assurance

Check & Verify

Free Edges

Free Faces

Manifold Edges

Non-manifold Edges

Check & Align ECS

Quality Assurance

Aspect Ratio

Skew Angle

Taper (2D)

Warpage (2D)

Jacobian Ratio

Twist

Collapse (Tetra)

Length / Area

Twisted Penta

Collapsed Tetra (Near Zero Volume)

Check Free Face (Unconnected Element Face)

Mesh Quality Plot

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Graphic Display - Mesh

Shading Feature-Edge

Feature-Edge

Shrink

Wireframe (Free-Face)

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Flying View

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Overview 1

Mesh Generation 3

Post-processing 5

Analysis 4


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Linear Static Analysis

Stress Distribution of Jacket

Offshore Platform / Steel Frame Composed of Cylindrical Jackets

(Plate + Frame)

Linear Static Analysis Multiple Load Cases

Result Combination and Transformation

Equation Solvers Direct Solvers

- Multi-frontal Sparse Gaussian Solver (Default)

- Skyline Solver

Iterative Solvers - Preconditioned Conjugate Gradient

- Generalised Minimal Residual

Net Solution Times (Pentium4 3GHz, 1GB RAM)

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Eigenvalue Analysis

Simply Supported Stiffened Plate (Plate + Beam)

1st Mode (64.58 Hz) 2nd Mode (106.05 Hz) 3rd Mode (208.96 Hz)

4th Mode (270.00 Hz) 5th Mode (440.58 Hz)

Modal Analysis

Lanczos Method

Subspace Iteration

Ritz Vector

Linear Buckling Analysis

Critical Buckling Modes

Buckling Modes

Load Combination

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Dynamic Analysis

Transient Response Analysis Direct Transient Response

Modal Transient Response

Time Forcing Function DB (54 Earthquake Acceleration Records)

Nonlinear Analysis

Boundary Nonlinear Analysis (Damper, Viscous Boundary, etc.)

Spectrum Response Analysis SRSS, CQC, ABS

Design Spectrum DB

Time Forcing Function

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Material Nonlinearity Analysis

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

Nonlinear Behaviours Hardening (Isotropic)

Softening

Iteration Methods Full Newton-Raphson (Auto Load Step)

Modified Newton-Raphson

Arc-Length Method

Initial Stiffness

Tendon Anchorage (Solid) - von Mises Pinched Cylinder (Plate) von Mises

Material & Geometry Nonlinear Analysis

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User-Supplied Materials

In FEA, users can use their own defined material models via Fortran-coded library file.

FEAs user-supplied material model supports nonlinear elastic and elasto-

plastic behaviours.

User-supplied material can be used seamlessly with all elements which

allow material nonlinear behaviours.

Nonlinear Elastic Material for Solid Element

Strain

Total Stress

Stiffness Matrix

Input

Output

User-defined Parameters Input Dialogue

USM Dialogue

USRMAT.DLL

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Geometry Nonlinearity Analysis

Iteration Methods Full Newton-Raphson (Auto Load Step)

Modified Newton-Raphson

Arc-Length Method

Initial Stiffness

Ring (Solid) Total Lagrangian

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Interface Nonlinearity Analysis

Interface Models Coulomb Friction

Discrete Cracking

Crack Dilatancy

Bond-Slip

Combined (Cracking-Shearing-Crushing)

Deformation (Discontinuity btwn Steel & Concrete)

Steel-Concrete Composite Girder

Principal Stress (Virtually Transformed & Clipped View)

Steel

Interface

Concrete

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Reinforcement Analysis

Reinforcement

Embedded Bar/Grid (Bonded/Unbonded)

Truss + Interface (Slip/Friction)

Maximum Principal Stress of Concrete with Deformation

Stress of Embedded Reinforcement

Deformation

2-Span Double-T Type Prestressed Concrete Girder

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Heat Transfer and Heat of Hydration Analysis

Visco-Elastic Models Creep-Shrinkage (Design Code) Temperature-Dependent Material

Pier Table (Construction Stage) - Temperature Pier Table (Construction Stage) - Stress

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

Heat Transfer Steady-State & Transient

Conduction, Convection,

Cooling Pipe Heat Flux Heat Flow Temperature Gradient Display

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Heat Transfer and Heat of Hydration Analysis

Guss Asphalt Pavement

Thermal Stress

Temperature at Top Plate

Temperature Distribution

Fire in a Subway Structure

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Static Contact Analysis

Hanger of Arch Bridge (Lug-Pin Joint)

Deformation and Stress Distribution by Contact

Contact Force

Lug (90mm)

Double plate (85mm)

Pin (224mm )

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Cracking Analysis

Cracking Models Total Strain Crack

Smeared

Crack Index

Steel Reinforced Concrete Bracket

Results Crack Pattern (Crack Stress/Strain)

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 : Magnitude Line : Shearing Direction

Crack Pattern (Disc Plot)

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Fluid Dynamics Analysis

CFD Models Turbulence Models

(RANS, k-w, q-w)

Compressible Solver (Preconditioning)

Compatible with incompressible Flow

Inviscid Flow

Steady/Unsteady Flow

Discretisation Scheme

2nd-order (Spatial, Temporal)

Boundary Condition

Symmetric (Slip)

Far-field

Wall, etc.

Results

Pressure

Velocity, Vorticity

Turbulent Kinetic Energy, Viscosity

Aerodynamic Coefficients

Turbulence near Bridge Section

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Fatigue Analysis

Methods and Parameters S-N Method (Stress-Life)

E-N Method (Strain-Life)

Load / Stress History

Rainflow Counting

Mean Stress Corrections

Stress Concentration Factor

Modifying Factors

Calculation Objects Boundary Nodes Only (Default)

Nodes of Selected Mesh Sets

Results Cycles to Failure

Damage

S-N Curves of Fatigue Design Codes

Life Cycle Contour Plot

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Load & B.C.

Loadings Body Force

Force / Moment

Mass

Displacement

Pressure

Beam Load

Pre-stress

Temperature

Boundary Conditions Constraint

Multi-Point Constraint

Contact Conditions

Convection

Heat Generation

Heat Flux

Time Forcing Function

Time Varying Load

Ground Acceleration

Response Spectrum Function

Spatially Varying Pressure (Function Applied)

Constraint based-on CSys.

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Arbitrary Loading

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

Rectangular Pressure (2D, 3D)

Circular Pressure (2D, 3D)

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

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Analysis 4

Post-processing 5

Overview 1

Mesh Generation 3



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Post-processing

Complete Support for Visualisation and Interpretation

Flexible User-control on Legends, Colors, Fonts, Magnification, etc.

Multiple Plots, Graphs and Tables in Multiple Windows

Deformed Shape Combined with Undeformed Shape (including Mode Shape)

Local Plots defined by Geometrical Topology or User-selection

Contour Plots and Animations (AVI)

Iso-value Lines (2D) and Surfaces (3D)

Clipping Planes and Slice Lines/Planes

Partitioned Plots

History Plots in Various Graphs and Animations (AVI)

Result Values in MS-Excel compatible Tables

Result Probe and Extraction

Result Extraction for Construction Stage Analysis and Time History Analysis

Screen-shots in WMF, BMP, PNG Picture Formats

State-of-the-art Reports Generated by XML and HTML

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Post-processing

Works Tree

Result Table

Result Graph

MS-Excel

Contour Plot

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Contour Plot Type

Contour

with Mesh

Contour

with Iso-line

Contour with Mesh

& Iso-line

Gradient

Contour

2-Color

Contour

Gray

Contour

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Deformed Shape

Deformed Contour with Original Shape

(Static Analysis)

Mode Shapes

(Stability Analysis)

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Iso-surface Plot

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

Capped Plot (Upper Part)

Multiple Iso-surfaces

Base Iso-surface

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Slice Plot

Multiple Slice Planes

Slice Plot at Arbitrary Plane

Original Plot

(Solid)

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Clipping Plot

Clipping Plane Definition

by Mouse Dragging

Original Plot

Clipped Plot

with Feature-Edge

Clipped Plot with Diagram

on Middle Clipping Plane

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Clipping Plot

Original Plot

Multiple Clipping Planes

von Mises stress and deformation of cable

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Mirror Plot

Symmetric Model

Mirrored Contour Plot Mirrored Deformed

Shape

Symmetry Plane

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Diagram Plot

Solid Type

Line Type

Section Plot of Frames

Diagram Plot with Deformed Shape

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Vector Plot

Vector Plot with Contour

Vector Plot with Transparent Geometry

Vector Plot Option

Head Type (Both, One, None)

Constant Head Size Constant Body Size Color (Contour, Mono)

Vector Plot

with Deformation

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Result Extraction

MS-Excel compatible Table

Graph (Stress vs. Time step)

Results can be extracted based on: - Analysis Case

- Analysis Variables

- Step (Nonlinear / Construction Stage Analysis)

- Node / Element (GRC Sys. GCC Sys.)

Nonlinear Analysis

Stress

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On-Curve Diagrams

2D On-Curve Graphs on Contour Plot

Fault Zone

Result Data at User-Specified

Sampling Points 3D On-Curve Graphs on Contour Plot

Front View

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Probe & Result Tag

Nodal Result

Sectional Result

with Clipped Plot

(Element Result)

Probe & Add Result Tags at Specified Nodes/Elements

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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)

Legend Option: - Colour (Value, Ratio, Description)

- Logo

- Range (including Min/Max/Zero)

- Format (Fixed/Scientific, Width)

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Solid Geometry Modelling Auto-generated Tetra Mesh Post-processing & Result Evaluation

Applications

Applications

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Woon-Nam Extradosed Bridge Single Pylon

Mode 1 Mode 2

Mode 9 Mode 8

Applications

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Geumga Extradosed Bridge

Double Pylon

Anchorage detail

Applications

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Solid elements Modelling of Hanger Clamp (Bonny River Suspension Br.)

Stress Contour

FE Model

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Applications Fatigue Analysis

Life Cycle

Damage

Hyung Jae Grand Bridge

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Applications Contact Analysis V-STIFF

DIAP

1- PL- 130x10x1124

DO

H- STIFF

397(397)

PL

312PL

V-STIFF

V-STIFF

1- PL- 130x10x1168H- STIFFDO

268PL

1.080PL

Contact faces

Gusset and web plates

Pins

Deformed shapes

Stress in contact faces

MIDAS FEA Mannual

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