Question

Sandwich Problem You are to design a sandwich structure (faceplate on botlh sides of the sandwich) which is subjected to 3 pt bend loads. The goal is to minimize deflection and maximize insulation. You are given CFRP consisting of carbon fibers and epoxy matrix faceplates (quasi-isotropic laminate, 3 mm thick) for the faceplate. You have two polystyrene (PS) foams to consider: expanded PS foam (closed cell, 0.050) and PS foam (structural, 0.8). The total sandwich thickness can be varied What would be the optimal fractions and total thickness of faceplate and foam for maximizing stiffness and insulation for each of the two foams? Explain your reasoning. Which would be better in performance? What would the optimal sandwich cost for each?

Answer 1

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