STRESS & ITS TYPES

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STRESS & ITS TYPES
Stress:
            It is an internal resistance force induced in a material against the external force, this force per unit area is called stress.
*SI unit of stress is N-M² and N-mm²
*It is donated by f and S
*Its symbol is Ϭ
*Formula of Stress is f=F/A
Types of Stress:
            There are three types of Stress.
                       1.   Compressive Stress.                                                                   
                       2.   Tensile Stress.
                       3.   Shear Stress.




Stress & its Types
1: Compressive Stress:
·        When a body is subjected to two equal and opposite axial pushes P (also called compressive load), then the stress induced at any section of the body is known as Compressive Stress.
·        Compressive load, there will be an increase in cross-sectional area and a decrease in length of the body. The ratio of the decrease in length to the original length is known as Compressive Stress.
Compressive Stress

2: Tensile Stress:
·        When a body is subjected to two equal and opposite axial pulls P (also called tensile stress), then the stress induced at any section of the body in known as Tensile Stress.

·        Tensile load, there will be a decrease in cross-sectional area and an increase in length of the body. The ratio of increase in length to the original length is known as Tensile Stress.

     
Tensile Stress


3: Shear Stress:
·        Force parallel to the resisting the force cause shearing stress. It is different to Tensile & Compressive stresses, which are caused by forces perpendicular to the are on which they act. Shearing stress is also known as tangential stress.

Ƭ=V/A
Shear Stress



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