Problem 2a: The figure shows a copper rod placed in an aluminium sleeve supported on a steel plate. Modulii of elasticit

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Problem 2a The Figure Shows A Copper Rod Placed In An Aluminium Sleeve Supported On A Steel Plate Modulii Of Elasticit 1 (91.68 KiB) Viewed 27 times

Problem 2a: The figure shows a copper rod placed in an aluminium sleeve supported on a steel plate. Modulii of elasticity are: 70 GPa for aluminium, 83 GPa for bronze, 118 Gpa for copper & 200 GPa for steel. Working compressive stress are: 70 MPa for aluminium, 80 MPa for bronze, 140 MPa for copper & 250 MPa for steel. Working shear stress are: 42 MPa for aluminium, 48 MPa for bronze, 84 Mpa for copper & 150 MPa for steel. D=70 mm, d=48 mm, b= 40 mm, g=2 mm, h= 250 mm. Compute the value of P(applied via a rigid circular plate) that will cause the aluminium to reach its maximum allowed stress if t=4 mm (express your answer to the nearest Newton) What will be the stress in the aluminium if t= 8mm? (express your answer to the nearest MPa, answer this in Problem 2b) Answer: 142723.00 bD 19 h