The thin rectangular plate is uniformly deformed such that Ex = 220E, Ey= -680 uE, and yy = 870 urad. If a = 35 mm, determine (a) the normal strain &, in the plate. (b) the normal strain &, in the plate. (c) the shear strain ynt in the plate. B D. a a a a a a a a a Answers: (a) En= i HE (b) Et= i HE (c) Ynt= i prad

Q: H h d

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Alloys

An alloy is an admixture of two or more metals or a metal and a non-metal. Since ancient times, man has been using alloys. Alloying helps to retain the properties of the parent matter, such as hardness, strength, toughness, ductility and is corrosion-resistant. Copper alloys such as brass have antimicrobial properties that help to fight against (Coronavirus disease 2019) COVID-19 and other hospital-acquired infections. Some common alloys are brass, bronze, solder steel, etc. Most alloys have a lower melting point than their constituents. This is due to the presence of a nonmetal as one of the constituents that behaves as an impurity and restricts the raise of melting point.