What is Stress?
Stress is “The restoring force per unit area of the material”. It is a tensor quantity that is written by the Greek letter σ. Measured using N/m2 or Pascal. Mathematically written as -
σ = F/A
- F = restoring force in Newton or N.
- A =area of cross-section in m2.
- σ = stress in N/m2 or Pa.
Types of Stress
Stress is considered to be Normal when the direction of the force deforming is perpendicular to the body’s cross-sectional area.
When two cross-sectional areas of the cylinder are exposed to opposite and equal forces the stress experienced is known as longitudinal stress.
Unit of stress in SI unit is (a) kg/mm² (b) N/m² (c) ksi (d) ksc
N/m² is the SI unit of stress. It is the internal resistance to external forces like bending, force, torsion, etc.
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