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 are wall footings, What are wall footings? Explain in short. Gener...

What are wall footings? Explain in short. Generally wall footings are required to support direct concentric loads. However, an exception is the wall footings for retaining wall

Dimension styles-autocad, Dimension Styles Dimension styles are the bas...

Dimension Styles Dimension styles are the basic method used to control the way dimensions look . Using Dimension styles you can change the text font, arrow head style,relativ

Metallurgy of electron beam welding, Metallurgy of Electron Beam Welding ...

Metallurgy of Electron Beam Welding EBW is capable of joining a variety of materials in a broader thickness range than any other fusion welding process. This is being in

Strength of Materials, Determine formula for Elongnation of body due to it'...

Determine formula for Elongnation of body due to it''s Self Weight

CAMS, COMPARISON WITH CAM MECHANISMS WITH LINKAGES

COMPARISON WITH CAM MECHANISMS WITH LINKAGES

Process planning, we have to design crane we did already with calculation r...

we have to design crane we did already with calculation remaining is process planning

The brasses-copper alloys, The Brasses 70/30 brass also called as cart...

The Brasses 70/30 brass also called as cartridge brass contains 70% copper and 30% Zinc. This is employed for cartridge cases, sheet fabrication, and condenser tubes and for u

What is suspension system? , (a) What is suspension system? Write down its ...

(a) What is suspension system? Write down its functions. (b) What are the types of suspension system? Write the names of suspension system used in front and rear of two wheelers

Oxides, Oxides These comprise alumina, magnesia, thoria, beryllia and ...

Oxides These comprise alumina, magnesia, thoria, beryllia and zirconia. Other oxides that are utilized sparingly due to high cost comprise hafnia, ceria and yttria. Variety of

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