In the language of physics, two terms describe the forces on objects undergoing deformation: stress and strain. Stress is a quantity that describes the magnitude of forces that cause deformation. Stress is generally defined as force per unit area.

Conversion factors are 1psi = 6895Pa and 1Pa = 1.450 × 10−4psi 1atm = 1.013 × 105Pa = 14.7psi. 1 psi = 6895 Pa and 1 Pa = 1.450 × 10 −4 psi 1 atm = 1.013 × 10 5 Pa = 14.7 psi. An object or medium under stress becomes deformed. The quantity that describes this deformation is called strain.

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what is stress and strain