Finite element modeling of fuel emission for thermoplastic multilayer fuel tanks with optimization of barrier properties

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Series titleSAE Technical Papers; no. 2006-01-0625
ConferenceSAE 2006 World Congress & Exhibition, April 03-06, 2006, Detroit, Michigan, USA
SubjectFinite element analysis; Emissions; Hydrocarbons; Fuel tanks
AbstractA numerical simulation model for the prediction of fuel hydrocarbon permeation is presented in this work. The barrier layer thickness optimization for thermoplastic multilayer fuel tanks is also considered. The diffusion model is based on the continuum approach with steady-state permeation regime across the multilayer polymeric wall. The hydrocarbon flux through the multilayer wall is determined by assuming continuity in vapor pressure at the polymer-polymer interface. Since the pinch-off zone is known to be the major source of emission per unit area, a method has been developed to automatically detect this zone at the end of extrusion blow molding process. After then, an improvement to the diffusion model has been proposed in order to evaluate adequately the hydrocarbon permeation through this specific area. Finally, a gradient-based algorithm is applied to optimize the barrier layer thickness to satisfy the total hydrocarbon fuel emission constraint for a plastic fuel tank (PFT).
Publication date
PublisherSAE International
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC numberNRCC 48838
NPARC number15877975
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Record identifier8d892af0-3169-44f1-9c44-875f5c2611d4
Record created2010-07-30
Record modified2017-06-06
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