Section modulus and value of bending moment, Mechanical Engineering

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

Posted Date: 10/20/2012 8:06:47 AM | Location : United States







Related Discussions:- Section modulus and value of bending moment, Assignment Help, Ask Question on Section modulus and value of bending moment, Get Answer, Expert's Help, Section modulus and value of bending moment Discussions

Write discussion on Section modulus and value of bending moment
Your posts are moderated
Related Questions
how to adjust the motorcycle clutch play

A Boot Strap Cooling system of 10 TR capacity is used in an aeroplane. The ambient air pressure and temperature are 0.85 and 20 0 C bar respectively. The pressure of air increases


Cylinder Series Test A series of round bars of various diameters are austenitized and quenched into oil or water. The bars are long sufficient hence the cooling of section at

constructing and working of he- ne laser


can a swimming pool that is full be cracked or lifted by hydrostatic pressure?

Do not round intermediate calculations, however for display purposes report intermediate steps rounded to four significant figures. Give your final answer(s) to three significant f

how we can design a shaft for gear box

Find out diameter of steel wire: Q: A load of 5 KN is to be raised with help of steel wire. Find out diameter of steel wire, if maximum stress does not to exceed 100 MNm 2