Stress-strain graph for Brittle materials

Stress-strain graph for brittle materials

Here in this diagram on the y-axis stress and x-axis strain is represented.

1. O to A

It is approximately a proportional limit.

Stress is directly proportional to strain but in brittle materials behaviour in such a way that we can not say that stress would be directly proportional to strain and if stress increase strain get increase or it can not increase from O to A.

2. A to B

Stress and strain both increases suddenly at point B the object is failing that is break so at point B called as breaking point or fracture.

In case of brittle material material fail suddenly.

Brittle material develop internal creak first and then the cracks reached up to the surface. This is the behavior of the brittle marerial.

Wood, concrete, glass, cast iron, etc. are the example of brittle material.