1. Normal stress:
In the above drawing, the force F acts perpendicular ( 90° ) to the sectional area ABCD, creating normal stress in the object.
Normal stress
= force ÷ area.
= F ÷ A
The normal stress is further subdivided into,
a. Tensile stress:
When the force acts perpendicular to the sectional area of the object, pulling it to stretch from its original shape, the stress so obtained is called tensile stress.
In the above drawing, force F acts over the object to stretch or elongate the body of the object, up to the red dotted line to develop tensile stress in the object.
Tensile stress
= tensile force ÷ area.
= F ÷ A
b. Compressive stress:
When the force acts perpendicular to the surface area of the object, compressing it to deform its shape, the resulting stress in the object is called compressive stress.
In the above drawing, the force F pushes the body of the object, to compress its shape up to the red dotted line, inducing compressive stress in the object.
Compressive stress
= compressive force ÷ area.
= F ÷ A
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2. Shear stress:
When the force acts parallel to the surface area of the object, the stress induced in the object is called shear stress.
As you can observe in the above drawing, the force F is acting parallel to the surface area ABCD developing shear stress in the object.
Shear stress
= shear force ÷ area.
= F ÷ A.
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Well-written article explaining normal stress and shear stress! The clear definitions and examples provided help in understanding these fundamental concepts in mechanics. The distinction between the two types of stresses and their effects on materials are explained concisely. It's great to see such informative content that simplifies complex topics. This article is a valuable resource for students and enthusiasts in the field. Cognitive behavioral therapy
ReplyDeleteThank you for sharing this insightful piece!