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A bar of length 1000 mm and diameter 30 mm is centrally bored for 400 mm, the bore diameter being 10 mm as shown below. Under a load of 30 kN, if the extension of the bar is 0.222 mm, what is the modulus of elasticity of the bar? (Ans E = 200736 N/mm2 )
See lessA composite bar is made up by connecting a steel member and a copper member rigidly fixed at their ends. The cross-sectional area of steel member is A cm2 while that of the copper member is 2A cm2 for half the length and A cm2 for the other half of the length. the coefficient of expansion of steel and copper are α and 1.25α respectively while the elastic moduli are E and 0.5E respectively. Estimate the stress induced in members due to temperature rise of T degrees.
See lessThe composite bar shown in Fig. below is subjected to a tensile force of 30 kN. The extension observed is 0.44. Find the Young’s modulus of brass, if Young’s modulus of steel is 2 × 10⁵ N/mm² .
See lessA ball of weight Q=12lb rests in a right angles trough, as shown in figure B.Determine the forces exerted on the sides of the trough at D and E if all surfaces are perfectly smooth.