Slide 1

FEA Visualization by Outsourcing

Voicu Popescuand

Christoph Hoffmann

Purdue University

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Visualization in FEA and CAD

ImportantDesigning products, validating product designs, maintaining and repairing products, updating, modifying and evolving products.Documenting products, marketing products, communicating events and analyses

ImperfectNot the core mission of FEA or CADYesterday’s graphics and visualization algorithmsGeared towards engineers, not necessarily easy to understand for non-expert users

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Importance of RealismVisual vocabulary common to allProficiency without trainingHigh-bandwidth from low-level perception

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Graphics in Movies, Games, and Animations

Defines state-of-the-artDrives research in graphics

RealisticSpeaks eloquently to anyone

Alas, bigger than lifeLittle emphasis on physical correctnessHard to make strictly equal to life

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Graphics in Animation

Defines state-of-the-artDrives research in graphics

RealisticSpeaks eloquently to anyone

Alas, bigger than lifeLittle emphasis on physical correctnessHard to make strictly equal to life

© Proper Graphics, www.propergraphics.com

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Our approach: “Outsourcing”

Federate FEA and CAD systems with animation system

Automatically convert FEA data into animation sceneCompute visualization in animation system

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Example: Simulation of 9/11 Attack on Pentagon (2003)

FEA simulation computed in LS-DYNA imported into 3DS-Max

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Our approach: “outsourcing”

Load

Simplify

Instantiate

Refine visual

properties

Register

Model surrounding

scene

ImporterFEA

Render

Animation

1

1

Export for interactive visualiz.

a

b

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Load

Simplify

Instantiate

Refine visual

properties

Register

Model surrounding

scene

ImporterFEA

Render

Animation

1

1

Export for interactive visualiz.

a

b

Engineering application generates geometry + material models + animation data

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Load

Simplify

Instantiate

Refine visual

properties

Register

Model surrounding

scene

ImporterFEA

Render

Animation

1

1

Export for interactive visualiz.

a

b

Parse and load data

Discard data with little visual relevance

Create visually equivalent animation scene

Load

Simplify

Instantiate

Refine visual

properties

Register

Model surrounding

scene

ImporterFEA

Render

Animation

1

1

Export for interactive visualiz.

a

b

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Create visual materials, lights, camera paths

Use existing or create new graphics models

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Modeling surrounding scene: geometry

Autocad Pentagon building model constructed from blueprints and Boeing 757 model Courtesy Amazing Graphics

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Modeling surrounding scene: color

Satellite (courtesy Space Imaging) and aerial (courtesy ASCE) images for realism

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Pre-impactscene

Integrationwith

simulation data

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Post-impactscene

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Load

Simplify

Instantiate

Refine visual

properties

Register

Model surrounding

scene

ImporterCAD&A

Render

Animation

1

1

Export for interactive visualiz.

a

b

Align simulation scene with surrounding scene

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Simulationintegrated into surrounding scene

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Load

Simplify

Instantiate

Refine visual

properties

Register

Model surrounding

scene

ImporterFEA

Render

Animation

1

1

Export for interactive visualiz.

a

b

Leverage state-of-the-art algorithms

Keep only interactively renderable materials

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Approach is mostly automatic

Load

Simplify

Instantiate

Refine visual

properties

Register

Model surrounding

scene

ImporterFEA

Render

Animation

1

1

Export for interactive visualiz.

a

b

Manual

Automatic

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Video

penta.mov

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Conclusions

Approach makes senseTranslate data instead of replicating functionality

State-of-the-art readily available which accelerates visualization researchRealistic visualization is a good starting point for multidisciplinary collaboration

Not a replacement for scientific / engineering / information visualization, but a great vehicle for general compelling communication

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Recent Results

Simulation controlled addition of visual detail

Complex beam profilesEroding elements used to seed dust effectFuel SPH elements used to visualize fire

Used in the context of 9/11 World Trade Center Simulation

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Simulation in context by Google EarthTM

model of downtown Manhattan

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Impact visualizationwith emphasis on

core column damage

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Oblique view(façade to core)

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Two floors viewedin chronological order

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Dust and glass debris visualization

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Fire visualization (left) controlled by SPH fuel elements (right)

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Comparison between simulated (left)actual Façade damage (right)

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Visualizations of SPH simulated jet fuel

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Video

wtc.mov

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Acknowledgments

Mete Sozen, Ayhan Irfanoglu, Sami Kilic, Scott Meador, Jason Doty, Hendry Lim, AmitChourasia, Ingo Brachmann, Oscar ArdilaComputer Science Department, Computing Research Institute, Envision Center, Rosen Center for Advanced ComputingTellabs Foundation, National Science Foundation, DOE, IBM, Intel, and Microsoft

Contacts and Links:

popescu@cs.purdue.edu

cmh@cs.purdue.edu

www.cs.purdue.edu/homes/cmh/simulation/

www…/simulation/wtc1.mov (133 MB)

www…/simulation/penta.mov (45 MB)

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