Determine the maximum permissible value of T provided the allowable shearing stresses in brass and steel are 70 and 110 MPa, respectively. The outer and inner diameters are 90 mm and 70 mm, respectively. G for brass and steel are 40 GPa and 80 GPa, respectively. В C D Legend: Brass Steel 1 m 1 m 1 m 1 m

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A: Elongation due to temperature change δT=Lα(ΔT)ΔT=T2-T1=T2-(-20)=T2+20

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Properties of materials

A property of a material describes its characteristics and distinguishes it from the others. The material properties are described it in terms of its hardness, color, appearances, and so on. The material properties generally depend on the type of material, or whether it is a metal or an alloy. There are different kinds of material properties such as mechanical properties, thermal properties, physical properties, and chemical properties. Chemical properties describe the material in terms of a chemical change. The mechanical properties come into existence when the material is acted upon by an external load. Thermal properties are associated with the temperature of the material and specific heat.