Define stress, Mechanical Engineering

Assignment Help:

Define stress:

Sol.: When body is acted upon by load or external force, it undergoes deformation (that is, change in shape or dimension) which increases gradually. At the time deformation, the material of the body resists the tendency of the load to deform the body, and when load influence is taken over by internal resistance of material of the body, it becomes stable. Internal resistance which is offered by body to meet with the load is called as stress.

Or, the force of resistance per unit area, which is offered by a body against deformation, is called as stress. Stress can be considered as total stress or unit stress. Total stress represent total resistance to an external effect and can be expressed in N,KN etc. Unit stress represents resistance developed by unit area of cross section, and can be expressed in KN/m2.

If external load is applied just in one direction, the stress developed is called as simple stress whereas

If the external loads are applied in over one direction, the stress developed is called as compound stress.

Normal stress ( σ ) = P/A N/m2

1 Pascal(Pa) = 1 N/m2

1KPa = 103  N/m2

1MPa = 106  N/m2

1GPa = 109  N/m2 


Related Discussions:- Define stress

Find out the friction force, Find out the friction force: The cord pas...

Find out the friction force: The cord passes over a massless and frictionless pulley, carrying a mass M 1 at one end and wrapped around a cylinder of mass M 2 which rolls on

Slider crank mechanism, What is the mathematical displacement equation and ...

What is the mathematical displacement equation and its derivatives?

Consideration for centrifugal tension, Consideration: 1. From above eq...

Consideration: 1. From above equation, it is clear that centrifugal tension is not dependent of T1 and T2. It depends upon velocity of the belt. For lower belt speed (that is,

Engine, Single Cylinder Vertical Engine has a bore of 30cm and a stroke of ...

Single Cylinder Vertical Engine has a bore of 30cm and a stroke of 40cm. The connecting rod is 100cm long. The mass of the reciprocating parts is 140Kg on the expansion stroke with

Kinematics and Dynamics of Machinery, I have Four (4) questions related to ...

I have Four (4) questions related to Kinematics and Dynamics of Machinery . I need them exactly after 30 hours. Thanks and please do let me know.

Plc, proportional controller for lube oil temperature of engine working dia...

proportional controller for lube oil temperature of engine working diagram

Determine lifting load of crane, Navy divers are called to rescue a group o...

Navy divers are called to rescue a group of office workers trapped in a basement under floodwater in Leeds, UK. The only access to the basement is via a 1.5 x 1.5 m horizontal hatc

APPLICATION OF TURBULENT FLOW IN ENGINEERING, HOW TO GO ABOUT WRITING A TE...

HOW TO GO ABOUT WRITING A TERM PAPER TITLED: APPLICATION OF TURBULENT FLOW IN MECHANICAL ENGINEERING.

Find out the quality, Find out the quality: ABC industries manufacture...

Find out the quality: ABC industries manufacture X-band radar scanners utilized to detect speed traps. The printed circuit boards in the scanners are bough from an outside ven

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