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

#power plant, Components of power plant &it''s functions

Components of power plant &it''s functions

Stresses., temparature stresses in composite bars

temparature stresses in composite bars

Diffrence between external diameter and internal diameter, Diffrence betwee...

Diffrence between external diameter and internal diameter: A compound tube is built by shrinking one tube on another, the ultimate dimension being, 80 mm internal diameter, 16

Schedule evaluation, Schedule Evaluation Each continuations of a partia...

Schedule Evaluation Each continuations of a partial schedule that are produced in step 1 are ranked as per to their respective cost function. This cost function might be dissim

How do we adjust throttle free play?, (a) What is the function of a throttl...

(a) What is the function of a throttle valve? Where it is used? (b) How do we adjust throttle free play?

Find the coefficient of friction between ladder and floor, Find the coeffic...

Find the coefficient of friction between ladder and floor: A ladder of 5m long rests on horizontal ground and leans against smooth vertical wall at an angle of 70° with the h

Ultrasound bolt load monitoring, Q. Ultrasound Bolt Load Monitoring? Ul...

Q. Ultrasound Bolt Load Monitoring? Ultrasound measurement of bolt stresses, using ‘Bolt Scope', should be used on: • All bolts tightened by tensioning. • All bolts in hy

State the types of foundations, State the types of foundations We saw ...

State the types of foundations We saw the different types of foundations commonly adopted for specific situation. In actual practice the situations are not very simple both in

Path function, how to prove that work done is a path function

how to prove that work done is a path function

Determine weight of body and coefficient of the friction, Determine weight ...

Determine weight of body and coefficient of the friction: For ce of 200N is needed just to move a certain body up an inclined plane of angle 15°, the force is parallel to th

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