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

Electrodes- stainless steel electrodes, Stainless Steel Electrodes A vari...

Stainless Steel Electrodes A variety of stainless steel electrodes are now being manufactured to produce weld metal similar to composition of most base metals. However, the analy

Processes , example on operation sheet?

example on operation sheet?

Creep - flat footed rail, Creep: Creep of rails is the forward moveme...

Creep: Creep of rails is the forward movement of rails in the direction of dominant traffic over a period of time. Creep is undesirable because it disturbs the gauge of the t

Thermal Systems Analysis and Design, Create Visual Basic function ffactor(R...

Create Visual Basic function ffactor(Re, rr) that calculates the Darcy-Weisbach friction factor in a pipe or duct, where Re is the Reynolds No. and rr is the relative roughness, us

Determine the loading on the beam, Determine the loading on the beam: ...

Determine the loading on the beam: Shear force diagram for a loaded beam is illustrated in Figure. Determine the loading on the beam & therefore, draw the bending moment diagr

Determine the expression for crippling load, Illustrate the assumptions mad...

Illustrate the assumptions made in Euler's theory. Determine the expression for crippling load for a long column when one end of the column is fixed and other end is hinged.

Sequecing problm, What is the sequence of this problem Job- 1 2 3 4 5 6 7 ...

What is the sequence of this problem Job- 1 2 3 4 5 6 7 M/c M1 4 13 16 7 11 12 10 M2 9 11 11 7 13 2 4

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