Exercise about Stress, Exercises of Engineering

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MECHANICS OF

DEFORMABLE BODIES

ENSC 20084

EXERCISE 2 –

Stress and Strain

ISABEL CABICO

EMANUEL AUSTERO

AARON ESTRELLA

NICHOLAS JARDINERO

DRET 2-

MAY 29, 2023

MECHANICS OF DEFORMABLE BODIES

1, A steel wire 30 ft long, hanging vertically, supports a load of 500 lb. Neglecting the weight of the wire, determine the required diameter if the stress is not to exceed 20 ksi and the total elongation is not to exceed 0.20 in. Assume E = 29 × 106 psi.

3, A steel rod is stretched between two rigid walls and carries a tensile load of 5000 N at 20°C. If the allowable stress is not to exceed 130 MPa at -20°C, what is the minimum diameter of the rod? Assume α = 11.7 μm/(m·°C) and E = 200 GPa.

4, A welded steel cylindrical drum made of a 10-mm plate has an internal diameter of 1.20 m. Compute the change in diameter that would be caused by an internal pressure of 1.5 MPa. Assume that Poisson's ratio is 0.30 and E = 200 GPa.