Equation for principal stresses and principal planes, Mechanical Engineering

Assignment Help:

Equation for principal stresses and principal planes:

Derive equation for principal stresses and principal planes for the element subjected to compound stresses.

Sol.: For state of stress shown in the given figure the normal stress and shear stress on any oblique plane inclined at angle θ is determined by,
445_Equation for principal stresses and principal planes.png 
1474_Equation for principal stresses and principal planes1.png 
As the principal plane should carry normal stress, shear stress acting on it is to be zero.
That is,
   1017_Equation for principal stresses and principal planes2.png 
This provides one of the principal planes, other principal plane shall be perpendicular to this plane.

Substituting value of θ in σn expression by rearranging as below.
343_Equation for principal stresses and principal planes3.png 
It provides the values of principal stresses. The largest one is called as major and smaller is called as minor principal stress.


Related Discussions:- Equation for principal stresses and principal planes

Material selection for insulation, Q. Material Selection for Insulation? ...

Q. Material Selection for Insulation? Material for 15ºC to 650ºC temp range is Calcium Silicate, Manville Thermo-12 or approved equivalent. Material for -18ºC to 230ºC temp.

What is a machine shop, A facility that uses machines to fabricate devices ...

A facility that uses machines to fabricate devices from stock raw materials or to change mechanisms based upon given specifications. Also, know as "Back" Shops. The common machi

Determine the actual average pressure, A multiple disc clutch, steel on bro...

A multiple disc clutch, steel on bronze, is to transmit 4.5 kW at 750 r.p.m. The inner radius of contact is 40mm and outer radius of the contact is 70 mm. The clutch operates in oi

Carnot theorem and efficiency - thermodynamics, Carno t Theorem: No h...

Carno t Theorem: No heat engine operating in cycle between the two given thermal reservoir, having fixed temperature can be more efficient than reversible engine operating be

Cylinder bore-engine terminology , Cylinder Bore: The nominal inner diame...

Cylinder Bore: The nominal inner diameter of the working cylinder is called the cylinder bore and is designated by the letter D and is usually expressed in millimetre (mm).

Classification of force - mechanics, Classification of force: Single f...

Classification of force: Single force is of two types that is, Tensile and compressive. Generally in a body several forces are acting. When a number of forces of different mag

Concept of torque speed variation in transmission system , Concept of Torqu...

Concept of Torque (Speed) Variation in Transmission System: When two different size gears are running at same speed, then the small gear makes more revolution than the big gear. T

COMPRESSOR PROBLEM FROM CUSTOMER, OUR CUSTOMER HAD APROBLEM WITH OUR CUSTO...

OUR CUSTOMER HAD APROBLEM WITH OUR CUSTOMER ,AND ME AS AMECHANICLAL ENGINEER FOUND THE PROBLEM

Compressive strain, Compressiv e Strain: When the compressive load ac...

Compressiv e Strain: When the compressive load acts on body then there will be an increase in cross sectional area and decrease in length of body. The ratio of reduction in l

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