Question

Discuss the behaviour of a metallic wire under increasing load with the help of stress-strain graph

Answer 1

Behavior of a metal wire under increasing load can be explained by the graph which is attached with this answer.

• OP portion of the graph clearly indicates that stress is directly proportional to the strain because of straight line. This is also called as Hooks law.
• After the point the graph is not a straight line.
• OE portion of the graph is elastic region.
• Elastic region gives the information about the stress that is applied to the metallic wire is not able to break the wire, it will act like a elastic.
• By increasing its length in the elastic region when stress releases wire again comes in its initial position, like in case of rubber band.
• If more stress is applied after this, wire breaks, this is known as breaking stress.

In the graph-

• P is proportional limit
• E is elastic limit
• Y is yield point
• B is breaking stress
• C is breaking point.