Importance of stresses in shaft, Mechanical Engineering

Importance of stresses in shaft:

What is  importance of stresses in shaft ?
Sol.:
In shaft the following significant stresses occur.

1. A maximum shear stress occurs on cross section of shaft at its outermost surface.

2. The maximum longitudinal shear stress occurs at surface of shaft on longitudinal planes passing through longitudinal axis of shaft.

3. The maximum tensile stress (that is, major principal stress) occurs at the planes 45º to maximum shearing stress planes at the surface of shaft. This stress is equal to maximum shear stress on cross section of shaft.

4. The maximum compressive stress (that is minor principal stress) occurs on the planes at 45º to longitudinal and cross sectional planes at the surface of shaft. This stress is equal to maximum shear stress on cross section.

5. These stresses are significant because they govern the failure of shaft. These stresses develop simultaneously and hence they should be considered simultaneously for design purposes.

6. For most of the engineering materials, fortunately shear strength is smallest as compared to the tensile and compressive stresses and in such cases only maximum shear stress on the cross section of shaft is the important stress for design.

7. For materials for which the tensile and compressive strengths are lower than shear strength, shaft design should be carried for lowest strength.

Posted Date: 10/23/2012 2:37:47 AM | Location : United States







Related Discussions:- Importance of stresses in shaft, Assignment Help, Ask Question on Importance of stresses in shaft, Get Answer, Expert's Help, Importance of stresses in shaft Discussions

Write discussion on Importance of stresses in shaft
Your posts are moderated
Related Questions
Open coiled helical spring: In an open coiled helical spring along with α = 38 o , if the inclination of the coil is ignored, determine the percentage by which the axial exten

physical meaning of viscous damping

advantages and disadvantages of locomotive boiler

How is a micrometer used?

hardness of bore well water is less than sea water .justif

Natural Frequency: This is the frequency of vibration of a system that is undamped and without external excitation while it is disturbed. Forced Vibration: This is the vibra

(a ) What are the demerits and merits of sliding mesh gear box? (b) Show a four speed gear box, including reverse speed for a passenger car and illustrate how the speed ratio is

Hello to whom it may concern. I am currently having much trouble with a physics problem. I have an inverted L beam lying on a table. At the end of the flat piece laying on the t

What are the advantages and disadvantages hard working over cold working

Calculate the maximum and minimum stress: A cast iron column of 200 mm diameter carries a vertical load of 400 kN, at a distance of 50 mm from the centre. Calculate the maximu