Design a rigid flange coupling to transmit a torque of 228N-m between two coaxial shafts. Theshaft is made of alloy steel, flanges out of cast iron and bolts out of steel. Four bolts are used tocouple the flanges. The shafts are keyed to the flange hub. The permissible stresses are givenbelow:Shear stress on shaft =100MPaBearing or crushing stress on shaft =250MPaShear stress on keys =100MPaBearing stress on keys = 250MPaShearing stress on cast iron = 200MpaShear stress on bolts =100MPa >Provide FBD

Mt=228 Nm=228000Nmm Diameter of shaft τ=16Mtπd3100=16*228000πd3d=22.645 mm or 25 mm

Answered: rigid flange coupling

Engineering

Mechanical Engineering

rigid flange coupling

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter11: Columns

Section: Chapter Questions

Problem 11.2.4P: Repeat Problem 11.2-3 assuming that R= 10 kN · m/rad and L = 2 m.

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Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

Design a rigid flange coupling to transmit a torque of 228N-m between two coaxial shafts. The
shaft is made of alloy steel, flanges out of cast iron and bolts out of steel. Four bolts are used to
couple the flanges. The shafts are keyed to the flange hub. The permissible stresses are given
below:
Shear stress on shaft =100MPa
Bearing or crushing stress on shaft =250MPa
Shear stress on keys =100MPa
Bearing stress on keys = 250MPa
Shearing stress on cast iron = 200Mpa
Shear stress on bolts =100MPa >
Provide FBD

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