Question

Nike athletic shoes are assembled using adhesives (Section 12.14). Up to around 1990, the adhesives used contained petroleum-based solvents which pose health hazards to humans and contribute to petrochemical smog. In order to improve this situation, the company worked with chemical suppliers to successfully develop water-based adhesive technology, which is now used for the majority of the as- sembly operations. As a result, solvent use in all manufacturing operations in Nike's subcontracted facilities in Asia was reduced by 67% since 1995. In 1997, 3157 x 103 Litre of hazardous solvents were replaced with 1290 tons of water- based adhesives. As another example, the rubber outsoles of the shoe were made by a process that resulted in a significant amount of extra rubber around the periphery of Y (MPa) UTS (MPa) METALS (WROUGHT) Aluminum and its alloys Copper and its alloys Lead and its alloys Magnesium and its alloys Molybdenum and its alloys Nickel and its alloys Steels Stainless steels Titanium and its alloys Tungsten and its alloys 69-79 105-150 0.31-0.34 0.33-0.35 90-600 140-1310 20-55 240-380 90-2340 345-1450 415-1750 480-760 415-1450 620-760 35-550 76-1100 0.29-0.35 0.32 41-45 330-360 180-214 190-200 190-200 80-130 350-400 130-305 80-2070 105-1200 205-1725 240-480 344-1380 550-690 40-30 60-5 0.28-0.33 0.28-0.3 0.31-0.3 0.27 60-20 NONMETALLIC MATERIALS 0.2 0.24 0.32- 140-2600 70-1000 820-1050 70-80 Ceramics Diamond Glass and porcelain Rubbers Thermoplastics Thermoplastics, reinforced Thermosets Boron fibers Carbon fibers Glass fibers (S, E) Kevlar fibers (29, 49, 129) 0.01-0.1 1000-5 7-80 20-120 35-170 3500 2000-5300 3500-4600 3000-3400 1.4-3.4 2-50 0.34 0 1-2 380 275-415 73-85 70-113 3-4 A piece of steel is highly deformed at room temperature. Its hardness is found to be 400 HB. Estimate the modulus of resilience for this material. Properties and Processing of Metal Powders, Ceramics, Glasses, and Superconductors PartiallyFIGURE 11.22 2.0 1.8 1.6 1.4 1.2 D 1.0 0.8 0.6 0.4 0.2 Cast iron and MgO stabilizéd temperature on the expansion for sever ceramics, metals, a 3tics. Note that the sions for cast iron partially stabilized (PSZ) are within al ZrO2 Ni-base superalloy Al Polyethylene Nylon Al alloys ZrSiO (zircon) 4 SiC Si3N4 Lithium aluminum silicate Fused SiO2 473 673 873 1073 1273 1473 1673 1873 Temperature (K)

Answer 1

Solutier: Steel hos been suhjecteol to the stes -st Usina the valve C 3 Oe Can 3 Loe knoo thet hodnex oP steel 33 ka/mrmt .. y - 1307.6 MPa Nouw Hhe moduls modus of necrlence s cal culatecl by 2. 2E

to e table C: