In my last lecture we have learnt about strain and types of
strain. Today we will learn about types of stress. We know that when a body is under loading
some kind of stress developed in it. Mathematically this stress is the ratio of
the applied force to cross section area of the body. If this stress reaches its
ultimate limit or failure limit for particular object, it breaks it into two
half. If this stress is under a certain limit (Elastic Limit), the body gets
its actual dimension after removal loading. So the stress play very important role
for designing any object.
There are various kinds of stress induced in the body due to
loading.
Let’s learn them one by one.
Types of Stress:
Tensile Stress:
When a body is under tensile load or pull loading, the
stress induce in it is known as tensile stress. The ultimate limit under
tensile loading is called ultimate tensile stress.
Compressive Stress:
When a body is under compressive load or push loading, the
stress induce in it is known as compressive stress. The ultimate limit under
compressive loading is known as ultimate compressive stress.
Shear Stress:
When two equal and opposite forces acted on parallel faces
of a body, the stress induce in it is called shear stress. This stress tends to
deform the shape of a body without changing its volume.
Thermal Stress:
When a body is resisted to expand and there is change in its
thermal condition, some stress developed in it, is known as thermal stress.
Thermal stress set up only when the body is not allowed to expand.
This is all about types of stress. If you have any query
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