The resistance per unit area offered by a body against deformation is...
- The force of resistance per unit area offered by a body against deformation is known as stress.
- The external force acting on the body is called the load or force.
- When a body is subjected to some external force, there is some change of body dimension. The ratio of change of dimension of the body to the original dimension is known as strain.
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The resistance per unit area offered by a body against deformation is...
Stress
The resistance per unit area offered by a body against deformation is known as stress. Stress is a measure of the internal forces within a material that resist deformation.
Definition
Stress is defined as force per unit area, and it is typically represented by the symbol σ. The formula for stress is given by: Stress (σ) = Force (F) / Area (A)
Types of Stress
There are three main types of stress:
1. Tensile Stress: This type of stress results from forces pulling on an object, causing it to elongate.
2. Compressive Stress: Compressive stress occurs when forces push on an object, causing it to shorten.
3. Shear Stress: Shear stress arises from forces acting parallel to the surface of an object, causing it to deform.
Units
Stress is typically measured in units of Pascals (Pa) or Newtons per square meter (N/m²).
Implications
Understanding stress is crucial in the field of engineering as it helps in designing structures and materials that can withstand external forces without failure. By calculating stress levels, engineers can ensure the safety and reliability of various components in buildings, bridges, machines, and other structures.