What is the relationship between strain and deformation?

Strain is the measure of deformation in a material caused by an applied force.

When a force is applied to a material, it causes the material to deform. The amount of deformation that occurs is known as strain. Strain is defined as the ratio of the change in length of a material to its original length. It is usually denoted by the Greek letter epsilon (ε).

Deformation, on the other hand, is the change in shape or size of a material due to an applied force. It is a general term that encompasses all types of changes that occur in a material when a force is applied to it. Deformation can be elastic or plastic. Elastic deformation is reversible, meaning that the material returns to its original shape and size when the force is removed. Plastic deformation, on the other hand, is irreversible, meaning that the material does not return to its original shape and size when the force is removed.

In summary, strain is a measure of the amount of deformation that occurs in a material when a force is applied to it. Deformation, on the other hand, is a general term that encompasses all types of changes that occur in a material when a force is applied to it.