Page 71 - Fundamental Of Design In Mechanical Engineering
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Stress
◦ When the mechanical component is subjected to external force,
a resisting forces is set up within the component. The external
resisting forces per unit area of the component recognize as a
stress.
◦ In the physical sciences and engineering, the force per unit area
within materials that arises from external forces
◦ Stress is expressed as the quotient of a force divided by an area
σ=
P = load or force acting on the body
A = cross – sectional area of the body
Unit = N / m 2 71
