Proportionality of stress & strain on stress-strain curve - Basic Mechanical Engineering

Q.  In stress-strain diagram, up to proportional limit ______
- Published on 01 Sep 15

a. stress is inversely proportional to strain
b. force is directly proportional to displacement
c. stress is directly proportional to strain
d. strain is directly proportional to stress

ANSWER: stress is directly proportional to strain

Related Content

 

    Discussion

  • Sravanthi   -Posted on 06 Nov 15
    Proportionality limit:

    - The relation between gradually increasing tensile force and the deformation of a material is plotted on stress-strain diagram.

    - Hooke's law states that stress is directly proportional to strain only upto proportional limit. At this point, the stress-strain curve deviates from straight line.

    - σ = Ee ---------( upto proportionality limit)

    here,
    E = modulus of elasticity ( It is measured in N/mm2)
    e = strain
    σ = stress ( It is measured in N/mm2)

➨ Post your comment / Share knowledge


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)
▲