AUTODYN® OverviewAugust 2006

AUTODYN® OverviewAugust 2006

Frank Lee

July, 2006 © 2006 Copyright ANSYS, Inc.2/55

Outline of Presentation• AUTODYN® Executive Overview (what is it?)

– Transient phenomena with high stress/strain rates (severe loadings)

• Application Areas (What does it do?)– FSI, Impacts, Penetrations, Explosions, Large Deformations

• Marketplace (Who uses it?)– Government Labs, Universities, Consulting Companies, Homeland

Security, Manufacturing

• Technical Details (How does it work?)– Integrated Interactive Program with Multiple Solution Techniques with a

User Friendly GUI

• Business Case (Why should you be interested?)– High user productivity resulting in lower reduced labor costs and shorter

project time

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ANSYS AUTODYN® – What is it?

• AUTODYN is used to simulate the response of solids, fluids and gases to high speed and extreme loadings. (solids behaving like liquids or gases)

• Keywords: explosion, severe loading, large deformation, high strain rates, penetration, blast

• AUTODYN: Discretize Space & time• AUTODYN is recognized world-wide as the most

user friendly, easy to use interactive program in this field.

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ANSYS AUTODYN – What is it?

• Intuitive, Easy to Learn and Use, Interactive GUI• Integrated Computing Environment (Pre, Post, Analysis)• Powerful range of Solvers

– Separate solvers optimized for fluids, structures and brittle materials– Different interacting solvers can be used in a single problem

• Focus on Efficiency and Accuracy of Computing throughout the Analyses

• Extensive, logically organized, well documented Library of material models

• Comprehensive integrated graphic output capabilities• AUTODYN is recognized world-wide as the most user

friendly, easy to use interactive program in this field.

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Interactive Intuitive GUI

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Solvers

SPH (brittle)

Shell (thin 2D)

Beam (long 1D)

Lagrange (structures)

Euler (fluids)

ALEauto remesh)

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Application Areas

• Mining (blasting)• Material Forming (powder compaction, forging)• Building Construction (protective structures, blast effects)• Road Construction (explosive excavation)• Demolition (buildings, offshore oil platforms)• Personnel Protection (body, helmet, vehicle)• Petroleum (secondary oil extraction)• Education and Research • Defense (armor, anti-armor, mine protection, vulnerability)• Naval Application (vessel vulnerability, underwater blast)• Aerospace (aircraft impact, space shield design, space debris impact)• Material Science (properties, response, fracture fragmentation)• Insurance (risk assessment)• Drop test simulation• Optimization • Manufacturing (explosive forming, electro-magnetic forming)• Biomechanics

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Applications:

Hypervelocity Impact

• Hypervelocity Impact

• Space Debris on Satellite Shield

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Blast and Fragment

• Contact, Erosion and Coupling can be used simultaneously in an analysis– Failure and fragmentation of components– Venting of fluids / gases through failed / fragmented components– Combined shock (blast) and impact (fragment) loading of structures

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Bullet Penetration

Bullet Penetration of Mild Steel

(338 Winchester Magnum)

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Shaped Charge penetration into multiple layersShaped Charge

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Missile Attacks

82µs57µs

Conical Shaped Charge

Conical Shaped Charge (CSC) Warhead

32µs57µs

Lump in Jet

Jet Tip VelocitiesMeasured : 9.27 mm/msAUTODYN : 9.10 mm/ms

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Out-of-Barrel Bullet Deflagration Test

Fragment Analyzer

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Mine Blast on a vehicle

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Acceleration of Occupant

MADYMO simulation, acceleration from AUTODYN

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Body ArmorSandia Gauntlet

Performance Evaluation

Gauntlet test sample with carbon composite in Kevlar envelope

Hardened steel right circular cylindrical test projectiles and their associated sabots

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Body Armor

Complete penetration of Gauntlet armor Test sample with a 64-grain projectile

Partial penetration of Gauntlet armor Test sample with a 64-grain projectile

Projectile Armor Skin Bone

Sandia Gauntlet Performance Evaluation

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Body Armor

Bullet Impact on Kevlar Helmet

Courtesy Tham Ching Yang, IHPC, Singapore

Light gas-gun

Helmet

FSP ~ 1.1gmTouch Probe

KEVLAR® Helmet

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Body Armor

Bullet Impact on Kevlar Helmet

Predicted damage Damage observed

Courtesy Tham Ching Yang, IHPC, Singapore

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Applications:

Bullet into RC

• Impact into Reinforced Concrete• SPH (meshless) solver is used in area of

impact. Lagrange in area away from impact. Beams throughout.

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Applications:

Blast on an RC Wall

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Multi-layered Armor

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Applications:

Airplane Impact

Phantom Jet Impact On Concrete

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Applications:

Blast in City Center

Staged Remaps

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Applications:

Blast on a Ship

• Euler-Lagrange Coupling– Multi-material Euler solver

used for the detonation and air blast / underwater shock

– Vessel can be modeled as a rigid body or deformable

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Applications:

Blast Loading in Building

• Blast loading on responding walls

• Euler-Lagrange coupling– Euler Blast Solver– Deforming structures

(solids, shells, beams)– Fluid (air) vents

through openings generated by blast

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Applications:

Natural Fragmentation

Mott distribution for failure strain

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Sheet Metal Forming

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Airplane Impact

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Impact on Honeycomb

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Train Crash

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Applications:

Bird Strike

Turbine Blade Composite Wing

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Circuit Board Drop Test

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Container Drop Test

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Hydroforming

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Crimping

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Applications:

Blast & Fragment Impact

• Blast and fragment loading of a CFRP Wing Box from a Rocket Propelled Grenade (RPG)

– Air Blast modeled using the Euler Blast solver

– RPG casing (fragments) and Wing Box components modeled using Lagrange solvers

– Euler-Lagrange coupling used for the blast loading

– Lagrange contact + erosion used for the fragment loading

Calculation performed by the Ernst-Mach Institute

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Applications:

Impact on Ceramics

Tungsten Rod

Interface dwell

Interface dwell andthen penetration

Penetration

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Applications:

Powder Gun

• Slowburn (Powder) EOS a two phase model• The material is modeled prior and after ignition as solid

and gaseous states• The release of energy depends on the reaction rate

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Applications:

Fragmenting Grenade

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Applications:

Sport Equipment

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AUTODYN Market

• Engineering Companies• Government Research Laboratories• Universities• Munitions Manufacturers• Explosives Manufacturers• Military Equipment Manufacturers• Aerospace• Risk Management Companies• Law Enforcement• Oil and Gas• Mining and excavation

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Material ModelsMaterial Models Menu

EOS Strength Failure

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Documentation

Clicking on ?brings up the relevant section of documentation

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AUTODYN in Workbench

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AUTODYN® integration into Workbench

• Explicit Transient Dynamics Solution in Workbench

– High quality Hex meshes – Mesh Smoothing/Optimisation

– Interface to CAD– Powerful meshing tools

• Tailored for Explicit– Persistent link to AUTODYN

• Updates to geometry/mesh feed directly back into AUTODYN model

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Productivity Tools

• Remapping– Space and Solution

• User Materials• User Subroutines• Part Libraries• Command Scripts• Animation Viewers• Parallel Processing

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AUTODYN - Summary

• Focus on Efficiency and Accuracy of Computing throughout the Analyses

• Intuitive, Easy to Learn and Use, Interactive GUI• Integrated Computing Environment (Pre, Post, Analysis)• Powerful range of Solvers• Extensive, logically organized, well documented Library

of material models• Comprehensive integrated graphic output capabilities• AUTODYN is recognized world-wide as the most user

friendly, easy to use interactive program in this field.

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Business Case

• Simulation of physical phenomena provides valuable insight into how things work and how things fail.

• Projects using AUTODYN for simulation will use significantly less labor costs and produce higher quality results due to the easy to use, friendly GUI.

• AUTODYN has a comprehensive toolkit of capabilities including multiple solution techniques, numerous ways to easily reduce thetime required to set-up, run and post-process complex calculations.

• AUTODYN has an intuitive easy to learn interface reducing the time required to learn how to use the program most effectively.

• First class customer support further enables customers to be more productive than using any other software package.

• AUTODYN has become the defacto standard world-wide for defense related simulations.

• Using AUTODYN is fun rather than a struggle.

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