United States Department of Transportation
i
Characterizing Roadside Hardware Materials for LS-DYNA3D Simulations
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1997-02-01
[PDF-2.69 MB]
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Abstract:Finite element models have three parts: geometry, connections and material properties. Being the visible parts of a model, geometry and connections are generally carefully considered. Material properties are often not chosen with the same degree of care although they are every bit as important to obtaining good results. Accurate simulations of vehicles impacting roadside hardware require an understanding of both the material behavior and the mathematical material models in LS-DYNA3D. A method for comparing LS-DYNA3D simulations to typical ASTM materials tests is described. Material input properties for W-beam guardrail steel, guardrail posts, flanged-channel sign posts and Ford Festiva fenders are found for LS-DYNA3D based upon experimental quasi-static tests. Strain-rate sensitive material models in LS-DYNA3D are explored.
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