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

Thermocouple, calibration curve standard temparature vs indicator tempratur...

calibration curve standard temparature vs indicator temprature.

Explain about the footings how it is transmit loads, Explain about the foot...

Explain about the footings how it is transmit loads. Footings are generally the lowermost supporting part of the structure known as sub-structure and are the last structural e

Essentials of a good boiler , ESSENTIAL S OF A GOOD BOILER: -     Sho...

ESSENTIAL S OF A GOOD BOILER: -     Should be capable of producing the required Steam at   the required pressure for minimum fuel required. -     Should be capable of stan

Spinal fluid collection, Spinal fluid Collection:    Spinal fluid is u...

Spinal fluid Collection:    Spinal fluid is usually obtained from lumbar region, although may be obtained during surgery from the cervical region or from the cistern or ventri

A circumferential fin rectangular profile is constructed , A circumferentia...

A circumferential fin rectangular profile is constructed of Cu and surrounds a tube having a diameter of 1.25 cm.  The fin length is 6 mm and its thickness is 0.3 mm. The fin is ex

Optimization, what are the different method for worm gear optimization

what are the different method for worm gear optimization

Performance criteria-aspects of scheduling , Performance Criteria This ...

Performance Criteria This is assumed that an FMS is the part of a superior production process. Consequently the performance of the FMS is not a major goal but imply to attain c

Strength coefficien, #question. how much the strength coefficient of 383 ca...

#question. how much the strength coefficient of 383 cast alloy , to calculate the quality index .

What is transmission system and what do you mean by a gear?, (a) What is tr...

(a) What is transmission system? Represent the main components of transmission system with the help of diagram. (b) What do you mean by terms torque, power and RPM? (c) What

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