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

What is the function of fuel feed system?, (a) What is the function of fuel...

(a) What is the function of fuel feed system? (b) What are the functions of a carburettor? (c) List main components of a carburettor. (d) Describe the working principle of

Explain ericsson cycle, (a) Write short note on following : (i) Ericsson...

(a) Write short note on following : (i) Ericsson cycle (ii) Diesel cycle (iii) Stirling cycle (b) The swept volume of a diesel cycle engine working on dual cycle is 0.0

Determine the extent of imperfection of the gasket surface, Q. Determine th...

Q. Determine the extent of imperfection of the gasket surface? To determine the extent of imperfection of the gasket surface subject to acceptance / rejection, the imperfection

What are the major characteristics of h.s.s. tool, If Taylor's tool life co...

If Taylor's tool life constants for a provided operation are specified of n = 0.5 and c = 400, what is the percentage increase in tool life when the cutting speed is reduced by hal

3d design software, Which software is worth in learning for upcoming techno...

Which software is worth in learning for upcoming technologies in mechanical field?

Explain index jig, Explain Index Jig? 1. This type of jig, as the...

Explain Index Jig? 1. This type of jig, as the name suggests, incorporate a suitable indexing mechanism, by means of which the work piece can be indexed to required posit

Introduction and over view of various manufacturing process, Introduction A...

Introduction And Over View Of Various Manufacturing Process The main aim behind advances in engineering and technology has been to raise the standard of living of man and to ma

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