Question

1. Design a clay-filled PE composite suitable for injection molding inexpensive parts. The final part must have a tensile strength > 3000 psi and a modulus> 80,000 psi PE costs $0.50/lb and clay costs $0.05/lb density PE 0.95 g/cm3, density clay 2.4 g/cm3 The plot below may be useful. 240,000 6,000 Tensile strength 200,000 5,000 160,000 4,000 120,000 3,000 80,000 3 5 2,000 40,000 1,000 Modulus of elasticity 0.3 0.4 0.5 0.6 0.2 Volume fraction clay 0 0.1

Answer 1

December '19 Friday Wk 49 Constitution Day (Spain), Independence Day (Finland). Farmers' Day (Ghana) T 1000 m m pos te ports there e 3500m 一. Clay and 650cm? of PE. com Cemposite 350cm3 Gso om PE uehay density of cday x volumte of oeght D Cm> 185 b clay looo o 53 Cost of matesials 1e 一1.36.1b 0 6.8 Total Cost 0:09ユー5.to.G 8 000 Cm

7 December '19 Saturday uposeat weh s Cittcol The Comp posite donsify Wk 49 035(R) (0 65)C0.5) 1.4545g /cm? th oe use only. D.. a volume machon clay , then us in the abore caleulast om ise t toeight of ะ Lt OG..lbt Cost of matetals alsoill change ie Cost of cla 053 Cost of PE$0 885 5$9, 8 g ta looo end total, Cost Densty of Composile. Can-e calculat .cde January 2020 M T W T F S S 6 7 89 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31