If the allowable stress of a revolving steel is 150 MPa, what is the equivalent angular velocity which will produce such The mean diameter is 440mm.A uniform bar with an area of 0.25 in2 is pulled between two points. The tensile force at a temperature of 21.11°C is 1200 lb. What will be the stress at -17.78°C? At what temperature will the stress be zero? Assume α = 5 × 10-6 in/(in·°F) and E = 29 × 106 psi.

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If the allowable stress of a revolving steel is 150 MPa, what is the equivalent angular velocity which will produce such The mean diameter is 440mm.

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter7: Analysis Of Stress And Strain

Section: Chapter Questions

Problem 7.3.24P: The stresses acting on a stress element on the arm of a power excavator (see figure) are ax= 52 MPa...

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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.

Question

If the allowable stress of a revolving steel is 150 MPa, what is the equivalent angular velocity which will produce such The mean diameter is 440mm.
A uniform bar with an area of 0.25 in2 is pulled between two points. The tensile force at a temperature of 21.11°C is 1200 lb. What will be the stress at -17.78°C? At what temperature will the stress be zero? Assume α = 5 × 10-6 in/(in·°F) and E = 29 × 106 psi.

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