What is mean by stress,strain,stress strain curve

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Stress is the force applied to a material, strain is the resulting deformation, and stress-strain curve shows the relationship between them.

Stress is the force per unit area applied to a material.
Strain is the measure of deformation or change in shape of a material.
Stress-strain curve illustrates the relationship between stress and strain for a given material.
It helps in understanding the material's mechanical properties, such as elasticity, yield strength, and ultimate strength.
The curve typically consists of three regions: elastic deformation, plastic deformation, and fracture.
In the elastic region, stress and strain are proportional, and the material returns to its original shape when the stress is removed.
In the plastic region, the material undergoes permanent deformation without a significant increase in stress.
Fracture occurs when the material fails under excessive stress.
Different materials have different stress-strain curves, reflecting their unique properties.

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