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 product definition data interface, Product Definition Data Interfa...

Product Definition Data Interface (PDDI) IGES provided a very practical first solution for CAD data exchange, complete with an exchange file format. It was remarkable in the sp

Calculate the torque, (a) Illustrate self-locking and self-energizing brake...

(a) Illustrate self-locking and self-energizing brakes. (b) The diameter of the drum is 250mm and the angle of contact is 90 o , If the operating force of 700 N is applied at th

Equipment for resistance welding-measurements, EQUIPMENT FOR RESISTANCE WEL...

EQUIPMENT FOR RESISTANCE WELDING-Measurements Measurement of the parameters are important while fixing the parameters or testing a machine. Resistance welding instrumentation s

Determine ratio between mass flow rate to condensing steam, Determine ratio...

Determine ratio between mass flow rate to condensing steam: In steam power plant, the steam 0.1 bar and 0.95 dry enters condenser and leaves as saturated liquid at 0.1 bar an

Milling, what is difference between slab milling and face milling ?

what is difference between slab milling and face milling ?

Physics Question, Hello to whom it may concern. I am currently having much...

Hello to whom it may concern. I am currently having much trouble with a physics problem. I have an inverted L beam lying on a table. At the end of the flat piece laying on the t

Describe about chain-wire and tape gauges, Q. Describe about Chain-wire and...

Q. Describe about Chain-wire and tape gauges? Chain, wire and tape gauges are fixed on structures like bridges and the weight is lowered to touch the water surface. Movable sti

Hooks law, State Hook's law: Sol.: It states that when material is l...

State Hook's law: Sol.: It states that when material is loaded within the elastic limit, the stress is proportional to strain produced by the stress. This means that the rat

What do you mean by terms change of state, (a) Illustrate reversible, irrev...

(a) Illustrate reversible, irreversible and Quasi-static process with examples. (b) What do you mean by terms change of state, path, process, property, cycle. (c) Distinguish

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