Section modulus and value of bending moment, Mechanical Engineering

Assignment Help:

Q. What do you mean by section modulus (Z)? What is value of bending moment in the terms of section modulus?


Sol.: Section modulus is ratio of M.I. about neutral axis which is divided by the outer most point from the neutral axis.

Z = I/ymax  .

For the Circular Shaft (Z) = I/y = ( ? D4/64)/D/2   =(  D3/32)

For the Hollow Shaft (Z) = I/y = {?  (D4 - d4)/64}/D/2   =( ? /32)( D4  - d4)/D
For the Rectangular section (Z) = I/y = (bd3/12)/d/2 =bd2/6

Section modulus represents strength of the section of the beam.

As; M =  σ .I/y =   .Z

Stress at outer fiber will be highest. That is,

M =   max.(I/ymax) =   max.Z


Related Discussions:- Section modulus and value of bending moment

Balsa wood truss car design, design a car to be build by balsa wood trusses...

design a car to be build by balsa wood trusses, the car has to be with in a specific dimension, calculations of forces on members and nodes using method of joints need to be done a

Mchanical vibration, the base of a spring -mass- damper system is subjected...

the base of a spring -mass- damper system is subjected to the periodic displacement. determine the response of the mass using the principle of superposition

Dryness Friction Value, Why dryness fraction are importance for steam power...

Why dryness fraction are importance for steam power plant in terms of safety and economic ?

Evaluate thermal efficiency of the engine, A carnot engines performs betwee...

A carnot engines performs between two reservoirs whose difference in temperature is 200 o C. If the work output of the engine is 0.5 times the heat rejected, make evaluation for th

Determine the forces in strings, Determine the forces in strings: The...

Determine the forces in strings: The Electric light fixture weighing 15N hangs from point C , by two strings AC and BC . AC is inclined at 60° to the horizontal and BC

Check ferrite content of austenitic stainless steel weld, Q. Check ferrite ...

Q. Check ferrite content of austenitic stainless steel weld? Check the ferrite content of each austenitic stainless steel weld, including overlay welds, in the as-welded condit

Rotational to linear, A hinged object hangs on the outside of a rotating wh...

A hinged object hangs on the outside of a rotating wheel. When the object is in the six o''clock position, it needs to be rotated 180 degrees using only the rotational power of the

Define yoke or magnetic frame - dc generator, Yoke or magnetic frame It...

Yoke or magnetic frame It is the outer cover of the machine. An even number of pole cores are bolted to the yoke. Its serves the following purposes 1. It gives mechanical su

Function generation by relative pole method, how mechanism can be synthesiz...

how mechanism can be synthesized using relative pole method?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd