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Problem #3: Composites Manufacturing Congratulations!! As an employee for a manufacturer of advanced ski equipment for the US Olympic team, you led an effort
Problem #3: Composites Manufacturing Congratulations!! As an employee for a manufacturer of advanced ski equipment for the US Olympic team, you led an effort that successfully developed a new ski design that dramatically ended a famous skier's recent slump in performance. This is good news!. To follow-up on your success, your company had decided to now mass produce the new ski design that you developed. The skis will be manufactured by first impregnating a dry fiber reinforcement preform with a thermosetting resin using a vacuum-assisted resin transfer molding process. The fully impregnated preforms will then be cured in an autoclave to yield the final products. For manufacturing process set-up purposes, your ski design can be viewed as a slab 2 meters in length with a rectangular cross-sectional size of 0.15 m wide by 0.005 m high. The resin impregnation process will be conducted so that uncured resin at a gage pressure of 120 KPa will be introduced at the end of each ski shaped mold and travel the full 2 m in length through the fiber perform. A complete vacuum will be applied to the resin front to add an assistive driving force to the impregnation. Assuming that Darcy's law applies with a constant impregnation stage resin viscosity of = 1.4 Pa's, a resin density of p = 1100 Kg/m, and an isotropic and uniform preform permeability level of K = 8 x 10-10 m, how long will it take to complete each ski impregnation process?
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