Crashworthiness analysis using advanced material models in DYNA3D
- Lawrence Livermore National Lab., CA (United States)
- Kaiser Aluminum & Chemical Corp., Pleasanton, CA (United States). Center for Technology
As part of an electric vehicle consortium, LLNL and Kaiser Aluminum are conducting experimental and numerical studies on crashworthy aluminum spaceframe designs. They have jointly explored the effect of heat treat on crush behavior and duplicated the experimental behavior with finite-element simulations. The major technical contributions to the state of the art in numerical simulation arise from the development and use of advanced material model descriptions for LLNL`s DYNA3D code. Constitutive model enhancements in both flow and failure have been employed for conventional materials such as low-carbon steels, and also for lighter weight materials such as aluminum and fiber composites being considered for future vehicles. The constitutive model enhancements are developed as extensions from LLNL`s work in anisotropic flow and multiaxial failure modeling. Analysis quality as a function of level of simplification of material behavior and mesh is explored, as well as the penalty in computation cost that must be paid for using more complex models and meshes. The lightweight material modeling technology is being used at the vehicle component level to explore the safety implications of small neighborhood electric vehicles manufactured almost exclusively from these materials.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10194678
- Report Number(s):
- UCRL-JC-114579; CONF-931121-30; ON: DE94002988; TRN: 93:004540
- Resource Relation:
- Conference: Annual winter meeting of the American Society of Mechanical Engineers,New Orleans, LA (United States),28 Nov - 3 Dec 1993; Other Information: PBD: 22 Oct 1993
- Country of Publication:
- United States
- Language:
- English
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COMPUTERIZED SIMULATION
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SAFETY
ALUMINIUM
COMPOSITE MATERIALS
MECHANICAL PROPERTIES
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330300
360103
360603
BODY AND CHASSIS
ELECTRIC-POWERED SYSTEMS