In physics, stress is defined as the internal force that particle exert as resistance to the force applied on it. This force is also called as restoring force that make present to applied object in place again.
Example, simply when you stretched any object or twist or pull it, then the force that generate there in this activity is called as stress.
Definition is that, stress is the internal restoring force per unit area of the particular material.
Formula
Formula is
Sigma (Stress) = internal restoring force (F) / Cross sectional area over which the force is acting (A)
The SI unit for stress is Pascal (Pa).
What is the difference between the stress and pressure?
There is a difference between stress and pressure. As, Pressure is force that is applied on the surface area of the object.
Stress is the internal force called as resistance generated inside the object so as to prevent it from breaking or collapsing.
What are the Major types of stress?
- Tensile stress – This force applied when two objects are pulling or stretching each other in opposite directions.
- Compressive stress – It appears when force is applied to compress certain objects
- Shear stress — It is when the force is parallaly applying on objects causing them roll over each other
- Volumetric stress – It is a stress, in which force is applied from all sides but the moment is not happening significantly.