CONCEPT OF STRESS AND STRAIN
Stress is a measure of the internal forces within a material that result from external forces applied to it. It is defined as the force per unit area that a material experiences when it is subjected to an external force. Stress is typically expressed in units of Pascals (Pa) or Newtons per square meter (N/m2).
Strain, on the other hand, is a measure of the deformation that occurs in a material when it is subjected to an external force. It is defined as the ratio of the change in length of a material to its original length. Strain is typically expressed as a dimensionless quantity.
Both stress and strain are used to describe the behavior of materials under external forces. The relationship between stress and strain is described by the material’s elastic modulus, which is a measure of the material’s stiffness. This relationship is important in determining the strength and stability of materials under different types of loads.
Stress and strain are two concepts that are commonly used in the field of physics and engineering to describe the response of materials to external forces.
Stress is defined as the force per unit area that a material experiences when it is subjected to an external force. Mathematically, stress can be expressed as:
Stress = Force / Area
The units of stress are typically expressed in Pascals (Pa) or Newtons per square meter (N/m2).
Strain, on the other hand, is a measure of the deformation that occurs in a material when it is subjected to an external force. Strain can be expressed as the ratio of the change in length of a material to its original length. Mathematically, strain can be expressed as:
Strain = Change in Length / Original Length
Strain is typically expressed as a dimensionless quantity.
When a material is subjected to an external force, it will experience both stress and strain. The relationship between stress and strain is described by the material’s elastic modulus, which is a measure of the material’s stiffness. The elastic modulus can be used to predict how much a material will deform under a given amount of stress. If a material is subjected to a stress that exceeds its elastic limit, it will undergo permanent deformation, and it will not return to its original shape when the external force is removed. This is known as plastic deformation.
