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Correlation of Finite-Element Analysis to Free-Motion Head-Form Testing for FMVSS 201U Impact Legislation
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Abstract
Automotive engineers and designers are working to develop pillar-trim concepts that will comply with the upper interior head-impact legislation, FMVSS 201U. However, initial development cycles have been long and repetitive. A typical program consists of concept development, tool fabrication, prototype molding, and impact testing. Test results invariably lead to tool revisions, followed by further prototypes, and still more impact testing. The cycle is repeated until satisfactory parts are developed - a process which is long (sometimes in excess of 1 year) and extremely labor intensive (and therefore expensive). Fortunately, the use of finite-element analysis (FEA) can greatly reduce the concept-to-validation time by incorporating much of the prototype and impact evaluations into computer simulations. This paper describes both the correlation and validation of an FEA-based program to physical free-motion head-form testing and the predictive value of this work.
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Citation
Locke, D., Woodman, D., and Clark, C., "Correlation of Finite-Element Analysis to Free-Motion Head-Form Testing for FMVSS 201U Impact Legislation," SAE Technical Paper 970163, 1997, https://doi.org/10.4271/970163.Also In
References
- Locke, D. Clark, C. “Energy-Absorbing Thermoplastics for Head Impact Applications,” SAE International Congress & Exposition Feb. 26-29 1996 Paper 960154
- “Advanced Notice for Proposed Rulemaking: FMVSS 201, Docket 92-28, Notice 2,” Federal Register 58 24 Feb. 8 1993
- Clark, C. Locke, D. “High Strain Rate Testing of Engineering Thermoplastics for Head Impact Applications,” SAE International Congress & Exposition Feb. 26-29 1996 Paper No. 960153
- Woodman, Daniel “Options in Mechanical Characterization of Engineering Thermoplastics for More Effective Material Modeling Practices,” SAE International Congress & Exposition Feb. 25-28 1997 Paper No. 970662