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Structural Simulation
Since 1954, Center for Fracture Physics has been engaged in studying the response of structures to extreme loadings including impact, blast, thermal, corrosion, fatigue, and large deformation static loads. These studies include finite element, analytical, and experimental investigations. The laboratory maintains expertise in finite element modeling for a wide variety of structures and loadings in fields of transportation, safety, design, structural and material failure, and for military applications. These diverse applications are met by maintaining general purpose finite element codes capable of analyzing a wide variety of problems and by modifying the codes for specific applications such as developing and incorporating material constitutive models capable of modeling complex damage mechanisms.
Examples of Finite Element Analyses
Computational Codes
SRI develops and maintains a library of finite difference and finite element analysis codes. These are continually updated with the latest computational techniques; new codes are also frequently obtained. Brief descriptions of the more frequently used codes are given below:
| DYNA3D |
A nonlinear, explicit, three-dimensional finite element code for the large deflection dynamic analysis of solids and structures. DYNA3D is capable of modeling the response of complex structures under a variety of loads including impact, blast, and thermal loading. DYNA3D has been used extensively in Center for Fracture Physics which maintains versions of the code with unique analysis options added at SRI.
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| NIKE3D |
A nonlinear, implicit, three-dimensional finite element code for solid and structural mechanics. NIKE3D is capable of modeling static and quasi-static response of structures to a variety of loads including pressure, thermal, and aerodynamic drag loading.
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| MAGI |
MAGI is a Smoothed Particle Hydrodynamics (SPH) code based on recent developments in the field of Computational Fluid Dynamics (CFD). This technique is based on a gridless Lagrangian approach, which is ideally suited for the analysis of high deformation dynamic events (hypervelocity impacts and explosions).
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| TOPAZ3D |
A nonlinear three-dimensional finite element heat transfer code. Capable of analyzing static and transient heat transfer in complex structures including conduction, convection, radiation, heat generation, and flux boundary conditions. TOPAZ3D can also be coupled to NIKE3D for thermal stress analysis.
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| INGRID |
A three-dimensional mesh generator for modeling nonlinear systems. INGRID is used to generate input files for DYNA3D, NIKE3D and TOPAZ3D.
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| TAURUS |
An interactive three-dimensional postprocessor for the analysis codes DYNA3D, NIKE3D and TOPAZ3D. Taurus provides the ability to display deformed geometries and contours or fringes of a wide variety of quantities on the mesh. Time history plotting is also available with TAURUS.
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| L2D |
L2D is a SRI proprietary dynamic, nonlinear, two-dimensional finite element code. L2D uses a free Lagrange code architecture which continuously remeshes allowing the analysis of problems with extreme deformation including explosions, impact loading, and penetration.
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Other software includes a library of material models developed and maintained at SRI that are incorporated and used in the finite element codes. The material models include: BFRACT for brittle microfracture, DFRACT for ductile microfracture, CAP1 (a cap model for concrete), POREQST for general porous material behavior, REBAR for steel reinforced concrete composite (or other fiber reinforced composite materials), EXPLODE for modeling explosives, SSONED for the highly nonlinear loading and unloading of porous materials such as unconsolidated soils, and several damage and fracture models for both homogeneous and composite materials.
Archive of Finite Element Analysis Quicktime Animations
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R&D Divisions