Stress, Tensile stress, Compressive stress, Shear stress

Stress

When a material is subjected to an external force, a resisting force
is set up within the component. The internal resistance force per unit area
acting on a material or intensity of the forces distributed over a given
section is called the stress at a point.


It uses original cross section area of the specimen and also known as
engineering stress or conventional stress.


Therefore, Stress


Stress
Stress


The resultant of the internal forces for an axially loaded member is
normal to a section cut perpendicular to the member

   


Tensile stress


If Stress > 0, the stress is tensile. i.e.
The fibres of the component tend to elongate due to the external force. If a materials is subjected to axial pull then its stress is known as tensile stress.



Tensile stress
Tensile stress


Compressive stress


If Stress < 0, the stress is compressive. i.e. The fibres of the component tend to elongate due to the external force.

If a materials is subjected to axial push then its stress is known as compressive stress.


Compressive stress
Compressive stress

Shear stress


When forces are transmitted from one part of a
body to other, the stresses developed in a plane parallel to the applied force
are the shear stress.


Shear stress
Shear stress

Shear stress
Shear stress

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