1. Discuss, in significant details the following theories of failure for shafting design;• Maximum Shear Stress Theory (MSST)• Distortion energy theory (DET)• Coulomb mohr theory (CMT)• Octahedral friction theory (OSST)• Internal friction theory (IFT)Maximum normal stress theory (MNST)

Answered: 1. Discuss, in significant details the…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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What are the maximum, minimum, and average power values for the shaft shown in the figure below if the shaft speed is 50 rpm, l = 14 cm, a = 4 cm, b = 12 cm, P = 750 N, Tmin = -200 N-m, Tmax = 400 N-m.
Which statement below is incorrect about a shaft in torsion? The angle of twist for a solid tube is proportional to the length of the tube proportional to the torque T inversely proportional to the shear modulus G inversely proportional to the square of its radius
Mechanical design A shaft with the following data: 1- The pulley (A) is 1000 mm in diameter and weight 300N. 2- The gear (B) pitch diameter is 600mm and weight -250N. 3- The pulley is keyed to the shaft at 400mm to the left of left hand bearing. 4-the distance between bearing C and B is 1250 mm. 5- The power is 20 kW at 750 rpm. 6- Tension ratio T1 / T2-2.5 7- The shaft d.livers power to a gear placed horizontally in front, the pressure angel of gear is 20. 8- The allowable shear stress is 70N / mm, kt-2 and km- 1.5. Determine: the diameter of shaft
The outside diameter of a hollow shaft is 1.6 times the inside diameter. When transmitting 420 W of power at 180 rpm, the angle of twist is one degree over a length of 40 times the inside diameter. Taking G for the material as 85 GN/m^2, determine the outside diameter of the hollow shaft in mm.
The transmitted torque of a hollow shaft is 3400 N-m at a shearing stress of 55 MPa. If the outside diameter is 1.25 times that of the inside diameter, what is the inside diameter, in mm?
A shaft made of steel receives 7.5 kW power at 1500 r.p.m. A pulley mounted on the shaft as shown in Fig. 14.19 has ratio of belt tensions 4.The gear forces are as follows : Ft = 1590 N; Fr = 580 N . Design the shaft diameter by maximum shear stress theory. The shaft material has the following properties : Ultimate tensile strength = 720 MPa; Yield strength = 380 MPa; Factor of safety = 1.5.
In drilling a deep oil well the drill shaft, consisting of sections of “drill rod”, is powered from the top, while the load or counter torque is taken off at the bottom. The drill hole is 3 1/2 miles deep. Assuming a solid drill rod of circular cross section and 1 in. diameter, designed to a working shear stress of 5,000 psi, turning at 700 rpm, calculate (a) The wind-up, i.e. the twist angle between the top and bottom. (b) The horsepower of the driving motor. (c) State all assumptions, and comment on the results. What other considerations may have to be taken into account in using this drill? NOTE: The shear modulus of steel may be taken as 12 x 106 psi. Also 1 mile = 5,280 ft.
Design a hallow shaft (Diameter and length) that develops 80 kW of power while rotating at a speed of 4000 rpm. The design constrains are as under:The angle of twist not to exceed 0.200Shear stress is not to exceed 480 MN/m2The outer diameter is to be twice the inner diameter. The shaft length is to be three times the outer diameter. Modulus of rigidity = 79 GN/m2.
n Mukwano Industries, a shaft assembly shown in Fig. 2 is driven by a flat belt at location A and drives a flat belt at location B. The drive belt pulley diameter is 300 mm; the driven belt pulley diameter is 500 mm. The distance between sheaves is 800 mm, and the distance from each sheave to the nearest bearing is 200 mm. The belts are horizontal and load the shaft in opposite directions. Determine the size of the shaft using Distortion Energy Theory (DET) and the types of steel that should be used. Use a safety factor of 10. Also, provide a free-body diagram as well as moment and torque diagrams
Illustrate what happens when a torque is applied to a circular shaft?
A solid steel shaft, whose Sy= 300 MPa and Su= 400 MPa, is used to transmit 3000 kW at 800 rpm. Determine its diameter.
The outside diameter of a hollow shaft that is twice its inside diameter .what is the ratio of its torque carrying capacity to that of a solid shaft of the same material and the same outside diameter?

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