Units of Stress – Strength of Materials

Before finding the units of stress we must know what is stress and what is formula of stress. It is the formula of Stress through which we can
easily determines the Units of stress.
Units of Stress – Strength of Materials
Since the stress is defined as the ratio of resisting force
or applied load to the cross section area. The formula of stress is given by
Where, 
P = Applied load on the body.
A = Cross section area of the body.

Units of Stress

The units of stress depends upon the unit
of load (force) and unit of area.
In MKS unit system, the unit of load is kgf
and that of area is square meter (i.e. m2). So the unit of stress
becomes kgf/m2. And if the area is expressed in square centimeter
than the unit of stress is kgf/cm2.
In the SI system of units, the load is
measured in newton and the area measured in m2. So the unit of
stress is N/m2. When the area is expressed in cm or mm, than the
stress unit becomes N/cm2 or N/mm2.
1 N/m2 = 10-4 N/cm2
= 10-6 N/mm2
1 MN/m2 = 106 N/m2
= 102 N/cm2 = 1 N/mm2
1 N/m2 = 1 Pa
Note: Here
N = Newtons
m = metre
cm = centimetre
mm = millimetre
Pa = Pascal
This is all about the units of stress. If you find anything
missing or incorrect than comment us. And if you like this article than don’t
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Pankaj Mishra

Pankaj Mishra is a blogger by passion and Mechanical Engineer by profession. He has completed his B.Tech degree in mechanical engineering in the year 2015. He loves to share his knowledge and help others.

2 thoughts on “Units of Stress – Strength of Materials

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