A rotary blade rotates at 3500 rev/min. The steel blade has a uniform cross section 3 mm thickness by 30 mm in wide, and has a 12 mm-diameter hole in the center as shown in the figure. Estimate the maximum tensile stress at the central section due to rotation. Use steel density as 7800 kg/m

A rotary blade rotates at 3500 rev/min. The steel blade has a uniform cross section 3 mm thickness by 30 mm in wide, and has a 12 mm-diameter hole in the center as shown in the figure. Estimate the maximum tensile stress at the central section due to rotation. Use steel density as 7800 kg/m

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 12RQ: The specific volume of red brass is 0.001865 ft3/lb. Whatwould be its density?

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Concept explainers

Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.

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