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Prepreg Platelet Morphology and Scale Effects on Molding Processability

DREW E. SOMMER, ANTHONY J. FAVALORO, R. BYRON PIPES

Abstract


Unidirectional, prepreg platelet-based molding systems have gained considerable attention for manufacturing parts with moderate performance and processability metrics. A numerical study of squeeze flow, using a recently developed technique for coupled flow simulation and fiber orientation analysis, has been performed to investigate the effects of the platelet morphology on the processing of prepreg platelet based composite molding systems. Two competing effects have been shown to drive the processability of such a material: (i) increasing extensional viscosity due to increasing platelet length and (ii) increasing apparent viscosity due to increasing uniformity of orientation distribution. By adjusting the platelet dimensions, the above phenomena have been isolated in the numerical simulations to demonstrate their relative importance on the processability of platelet based molding systems.


DOI
10.12783/asc2017/15368

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