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

Currency bull spread and bear spread, Currency Bull Spread and Bear Spread:...

Currency Bull Spread and Bear Spread: A currency bull spread is constructed by buying a call option for a particular underlying currency and simultaneously writing a call opti

Uniformly distributed load and uniformly varying load, Uniformly Distribute...

Uniformly Distributed Load and Uniformly Varying Load: Uniforml y Distributed Load (UDL) A UDL is one which is spread over beam in such a manner that the rate of loading

Principal design criterion of plant layout, Q. Principal design criterion o...

Q. Principal design criterion of Plant layout? Safety-in-Design is a key factor associated with the layout design of any facility. The principal design criterion is to minimize

Determine velocity at a cross section of the pipe, Consider a fully develop...

Consider a fully developed laminar flow of a fluid through a 200 m long and 4 cm diameter horizontal and circular pipe. The density and the viscosity of the fluid are 1400 kg/m 3

#title VECTORS, The 70m microwave transmission tower is steadied by three g...

The 70m microwave transmission tower is steadied by three guys cable. Cable AB carries a tension of 12kN. Express the corresponding force on point A as a vector

Working of supercritical steam rankine cycle, With the help of neat diagram...

With the help of neat diagram illustrate the working of supercritical steam Rankine cycle. Discuss its limitations. Diagram the flow graph of modern thermal power plant and show

Determine the temperature distribution, The wall shown is 1 m thick. The le...

The wall shown is 1 m thick. The left surface of the wall (x=0) is maintained at a constant temperature 200 degrees Celsius. The right surface (x=L=1 m) is insulated. The thermal c

Agriculture, i am thinking that neglecting the foot gears and put hand gear...

i am thinking that neglecting the foot gears and put hand gears instead of it in two wheelers .so what is the procedure

Calculate the response of the system, A Spring - mass system which is subje...

A Spring - mass system which is subjected to a harmonic force FCoswt. calculate the response of the system, refer figure Given x (0) = 0.01 m x(0) = 0.04 m/sec w = 30 rad/

Explain about hydraulic calculation, Hydraulic calculations are carried out...

Hydraulic calculations are carried out by both Process and Mechanical Engineering. Generally speaking, Process Engineering will initiate many hydraulic calculations for piping sys

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