Difference between Elastic and Plastic Deformation

Elastic deformation is temporary and reversible, while plastic deformation is permanent and irreversible. In elastic deformation, a solid is subjected to external forces, causing it to deform. However, when the force is removed, the solid returns to its original shape. Plastic deformation, on the other hand, occurs when the forces applied to a solid exceed its elastic limit, resulting in permanent changes in shape or size. Understanding the difference between these deformations is crucial in engineering to design structures that can withstand the expected loads without undergoing permanent damage.