Strength of Materia another it is tensile E TI G? a? ) APLd- APL Cd??) 81 mperature is same with higher value Simple Stresses and Strains PROBLEMS FOR EXERCISES r bnid 1. Tension test was conducted on a specimen and the following readings recorded. Diameter = 22 mm %3D Gauge length of extensometer = 200 mm %3D Least count of extensometer = 0.001 mm At a Load of 22 kN, extensometer reading = 60 At a Load of 36 kN, extensometer reading = 94 %3D Yield Load = 95 kN 8T.S %3D Maximum Load = 157 kNstnni TC.91 ni muoda sd ofioqmo od ibigh ons lsisism owi odT.droitiog ni %3D Diameter at neck=15 mm Final length over 110 mm original length = 132 mme gnibeol orit Tobnir od Find Young's Modulus, yield stress, ultimate stress, percentage elongation and percentage reduction in area. bns ORSA anoitrog senii on 2 mumu isson's ratio u is [Ans E= 2.16643 105 N/mm, p= 249.91 N/mm? Ultimate stress = 413.01 N/mm?, % elongation = 20 % reduction in area = 53.51] %3D 2. The composite bar shown in Fig. 2.74 is subjected to a tensile force of 30 kN. The extension observed is 0.372 mm. Find the Young's Modulus of brass, if Young's Modulus of steel is 2 x 105 N/mm. la ed tot ( m[Ans 99777.6 N/mm] 1530 mm o 20 mm o aitos so1ot erlt bni E= A. () BRASS P = 30 kN STEEL mer -400 mm 300 mm quating strain energy" Fig. 2.74 3. The steel flat shown in Fig. 2.75 has uniform thickness of 20 mm. Under an axial load of 80 kN, its extension is found to be 0.17 mm. Determine the Young's blor Modulus of the material. [Ans E = 2.03867 10$ N/mm] b2 = 40mm %3D = 80 P- P 80KN qule 500mm Fig. 2.75 Shot on OnePlus Powered by Triple Camera