Stress And Strain Graph Of A Metal

Question 1

Stress is ________ proportional to strain from origin to the limit of proportionality.

Answer 1

Directly

It obeys Hooke’s Law at this point

Question 2

The material may obey Hooke’s Law from the Limit of Proportionality to the

Answer 2

Elastic limit

Question 3

Elastic deformation occurs up to the _______ limit.

Answer 3

Elastic

Question 4

Plastic deformation occurs beyond the elastic limit occurs

Answer 4

Beyond the Elastic Limit

Question 5

After the Elastic Limit there are 2 _____ points

Answer 5

Yield

Where the material extends rapidly.

Question 6

The material reaches the ULTIMATE TENSILE STRENGTH point. Beyond this point the material becomes longer and thinner at its weakest point before breaking.

Answer 6

This point is the max amount of stress the material can withstand.

Question 7

The stress value at the point of fracture is known as the:

Answer 7

Breaking strength.

Question 8

Young Modulus is known as

Answer 8

The ratio of stress to strain (up to the limit of proportionality) is a constan

Question 9

Young Modulus =

읕

Answer 9

Tensile strain

Question 10

Polymeric materials consist of

Answer 10

Long molecular chains

E.g rubber (Elastic behaviour) and polythene(Plastic behaviour) both stretch a lot before breaking.