Product Features

Solver MethodsLagrangian (volume and structural) Eulerian (volume)Arbitrary Lagrange EulerMeshfree (SPH) Block structured UnstructuredLarge deformationNonlinearSolid mechanicsFluid mechanicsShock wavesCoupled

Pre-processingInteractive intuitive interfaceIntegrated with solvers and post-processorWizards for ease of set upVisual checking of dataData checking during model creationComprehensive restarting capabilities:all valid data can be modified/added/removed at any stageMaterial data libraries (200+)Context-sensitive online help

InterfacesANSYS® ICEM CFDTM

NASTRAN®

ANSYS® LS-DYNA®

TrueGrid

Post-processingVisualization for large datasetsInteractive intuitive interfaceIntegrated with solvers and pre-processorAnimation wizard and editorStand-alone free viewer for 2-D and 3-D animationsContours and isosurfacesElement examine probeVectorsMaterial location and statusGauge time history plottingPart historiesVRMLResults profileContext-sensitive online help

Parallel ProcessingShared memory (SMP)Distributed memory (DMP)Mixed SMP and DMPAvailable on Windows NT/XPAvailable on Linux and UnixAutomatic decompositionUser-defined decomposition

Supported SystemsWindows NT/2000/XPLinuxUnix

ANSYS® AUTODYN®

Explicit Software for Nonlinear Dynamics

ANSYS AUTODYN is an explicit analysis tool for modeling nonlinear dynamics of solids, fluids and gases and their interaction. It is a versatile explicit numerical tool providingadvanced capabilities backed by first-class support. ANSYSAUTODYN has been used in a number of applications:

Optimization and design of armor and anti-armor systemsMine protection scheme design for personnel carriersBuilding protection measures and insurance risk assessmentfor blast effects in city centersAircraft impact risk assessment for power stationsPerformance studies of oil well perforating chargesDecommissioning of offshore platformsShielding system design on the International Space StationSafety assessment of particle acceleratorsCharacterization of materials subjected to high dynamic loading

Based on continuous development since 1986, ANSYS AUTODYN is a user-friendly software package that includes:

Finite elements (FE) for computational structural dynamicsFinite volume solvers for fast transient computational fluid dynamics (CFD)Meshfree/particle methods for large deformation and fragmentation (SPH)Multi-solver coupling enabling a wide range of multiphysics solutionsWide suite of material models incorporating constitutive response and coupled thermodynamicsModels and data for metals, ceramics, glass, concrete, soils, explosives, water, air and many other solids, liquids and gases

ANSYS AUTODYN is the platform of choice for structural dynamics, fast fluid flow, material modeling, impact, blast and shock response at many leading institutions worldwide.The loyalty and growth of the ANSYS AUTODYN user base is testament to:

Excellence of ANSYS AUTODYN support servicesFocus on developing products that help you solve problems Ongoing emphasis on R&D and continuity of management and sales teams

An integrated product, ANSYS AUTODYN tightly integratesthe pre-processing, post-processing and analysis modules formaximum productivity. It can be run in serial or parallel modeon Microsoft Windows and Linux and Unix systems. Bothshared memory and distributed cluster are supported.

Interactive intuitive pre/postprocessor integrated with solver

Blast analysis in city center

Wizard forease of set up

Product Features

Material ModelingStrength models• Elastic• Viscoelastic• Strain hardening models• Strain rate hardening models• Thermal softening models• Porous compaction models• Concrete/soil (Drucker-Prager, RHT)• Ceramic/glass (Johnson-

Holmquist)• Third invariant dependence• Orthotropic yield• Orthotropic solid• Orthotropic shell• Laminated shellEquations of state• Linear• Ideal gas• Mie Gruneisen• Analytic multi-phase• Tabular multi-phase• Two-phase liquid-vapor• Explosives• Tabular porous• P-alphaFailure models• Maximum stress/strain• Effective stress/strain• Shear damage• Orthotropic damage• Johnson Holmquist• Johnson Cook• Orthotropic stress/strain• Tsai-Wu, Tsai-Hill• Crack softening• StochasticUser-specified models can be defined in all aspectsVirtually all models can be used in every solverVirtually all models can be used with erosion (element death)Five erosion criteria User-defined erosion

Analysis TechniquesExplicitTransient dynamicConditionally stableHypoelasticNonlinearCompressible flowDynamic relaxation for quasi-static analysisAutomated contactAutomated fluid-structure coupling

Coupling of SolversEuler-Lagrange coupling• Fast automated solver• Across arbitrary mesh interfaces• Coupling to thin structures• Doubly wetted thin structures• Porous structuresJoins between structural elements

Compelling FeaturesANSYS AUTODYN is not an average explicit finite ele-ment or computational fluid dynamics program. From thevery beginning, we developed ANSYS AUTODYN tohandle — naturally and effectively — the nonlinearbehavior of fluids and structures in an integrated fashion.A key component is the seamless way that you can couplesophisticated material models with a fluid-structure program. ANSYS AUTODYN is different from otherexplicit programs in a number of ways:

Integrated and coupled response of fluids, structures and materialsMultiple solvers including FE, CFD and SPH, and the coupling between FE and the other solversIn addition to fluids and gas, materials with strength,such as metals, can be used in all solvers Comprehensive remapping capabilities from FE to CFD and vice versaInteractive GUI with leading-edge visualizationSolvers seamlessly integrated with pre- and post-processorsExtensive material model library combining thermodynamic and constitutive responsesSerial and parallel computation on shared memory and distributed memory systemsDirect support from experienced developersIntuitive user interfaceExtensive validation with physical experiments

ApplicationsANSYS AUTODYN has been used in a vast array of real-world projects and nonlinear phenomena:

Designing the shielding system on the International Space StationModeling the World Trade Center’s impacts and structural collapse in forensic investigationsPerforming assessment of protection layers for foreign object damage on civil aircraftConducting vulnerability assessment of composite aircraft components to fragmenting warheadsPerforming intercept of ballistic projectiles and lethality investigations for defenseModeling impacts on power stationsDetermining asteroid impacts on earthDesigning mine protection schemes for personnel carriersOptimizing passive and reactive armor systems

Material data libraries

Buried mine blast and its effecton an armored fighting vehicle

Oblique hypervelocity impact test (left)compared to analysis (right). Courtesyof UDRIS NASA

Product Features

Coupling of Solvers (continued)Joins between structural elements and SPHSubcyclingCombined structured and unstructured FE meshes

Symmetries and Remapping1-D Cartesian and spherical2-D Cartesian and cylindrical3-D Cartesian3-D reflective (1/8, 1/4, 1/2)Remapping• Within solvers• Between solvers• 1-D to 2-D to 3-D• Dezoning

Structural SolversUnstructured meshesMulti-block structured meshesCombined unstructured and structured meshes2-D and 3-D solids elements• Axial and planar solids• Hexahedral (bricks)• Pentahedral (wedges)• Tetrahedral (tets)• ALE (adaptive rezoning)2-D and 3-D surface elements• Axial and planar shells• Quadrilateral (quads)• Triangular (trias)• Layered shells• MembraneBeamsSpringsDampersFast large deformation elementsAccurate extreme deformation elementsCoupled heat conductionErosion (death) of elementsRigid bodies

Fluid SolversEulerian solversLagrangian solversALE solver2-D and 3-D finite volumesFast accurate ideal gas solver (FCT)Multi-material VOF solversMaterial viscosity/strengthFree surfacesMulti-block structured

ContactCompletely automatedSelf contactNode to surfaceEdge to edgeStructural deformable to deformable contactStructural deformable to rigid contactSPH to deformable structural and rigid contact

Designing, assessing and optimizing anti-armor devicesConducting performance studies of well perforating chargesAssessing satellite damage from space debris impactsDetermining blast effects in city centersConducting safety assessment of a particle accelerator beam dumpAnalyzing fragmentation of solid bodies

Determining underwater explosions effects on shipsPerforming optimization of mine disposal devicesPerforming assessment and design of kinetic energy penetratorsDetermining blast propagation in underground tunnels and structuresImproving sheet metal stampingAnalyzing bird strike on aircraftDetermining hydraulic ram effects in aircraft fuel tanksPerforming structural response analysis of a containment vessel under hydrogen detonation

Simulating response and breakup of glazing under blast loadingAnalyzing fuel slosh in racing carsAnalyzing explosive welding and cuttingAnalyzing powder compaction of sintered metalsDetermining progressive damage of composite structures to impacts loadsAnalyzing explosive forming of aerospace componentsPerforming perforation and behind armor debris analyses of various armor configurationsDeveloping water/sand barrier assessment for mitigation of explosives fragmentation and blastPredicting blunt trauma injuriesPerforming optimization of transparent armor on wheeled vehicles

Ceramic armor impact: simulation (top)

Shaped change analysisusing multi-material Euler

Stand-alone free viewer forinteractive and 2-D and 3-D animations

Damage and collapse of a brick buildingdue to an internal explosion

Fragmenting ring usingstochastic properties

1001 Galaxy Way Suite 325 Concord CA 94520 USA

+1 925 771 2300

Applications (continued)Performing safety distance assessments for hazardous storage sitesDetermining damage of (reinforced) concrete structuresunder impact and explosive loadingDecommissioning of offshore platformsAnalyzing blast-structure interaction assessment of onshore petro-chemical plantDetermining structural damage of an offshore module to a dropped objectPredicting blast-induced rock fragmentationDeveloping design of rockfall galleriesAssessing concrete damage caused by high frequency ground motionsModeling of cavitation and yawing of a supersonic projectile traveling in waterInvestigating pipe rupture incident at a nuclear facilityAnalyzing fracture of ceramics under intense loadingAssessing disturbed flow field during rocket stage separation

For more information about ANSYS AUTODYN, please visit www.ansys.com.

ANSYS AUTODYN originally was developed by Century Dynamics, Inc., a subsidiary of ANSYS, Inc.

Product Features

Contact (continued)Eroding contactFriction

Detonation ModelsAutomatic detonation logicMultiple detonation points2-D and 3-D

NonlinearityityLarge strainLarge rotationElastoplasticViscoplasticFragmentationShock capturingPhase changes

Boundaries and LoadsInitial conditionsTranslational velocityAngular velocityGravityArbitrary time varyingEnergy depositionPressurePoint loadEdge loadWave transmissionFluid/material flow inletFluid/material flow outletRigid wallClampedPinnedTranslational velocity constraintRotational velocity constraintAngular velocity constraintUser specified

ThermalDeformation heatingThermal expansionThermal softeningMulti-phase transitions and statesHeat conduction

DocumentationContext-sensitive online helpUser’s manualInstallationTutorialsTheory manualRelease notes

Product SupportOngoing support, maintenance and enhancementTrainingUser group meetingsUpdate seminars

www.ansys.com

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+44 (0)1403 270066

Publication subject to change without prior notice. ANSYS, ANSYS Workbench, CFX, AUTODYN, and anyand all ANSYS, Inc. product and service names are registered trademarks or trademarks of ANSYS, Inc. or its subsidiaries located in the United States or othercountries. ICEM CFD is a trademark licensed by ANSYS,Inc. All other trademarks or registered trademarks arethe property of their respective owners.

Image credits: Some images courtesy of Cranfield University, DCMT, UK

©2006 ANSYS, Inc. All Rights Reserved. Printed in USA.

Armor/anti-armor analysis

Penetration in a masonry structure

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