Solid mechanics is a field of continuum mechanics dedicated to analyzing the behavior of solid bodies subjected to various types of external forces. It examines the relationship between applied loads and the resulting internal stresses and strains within a material, determining how the body will deform or potentially fail. Core principles involve the study of equilibrium, defining how forces must balance throughout the structure, alongside the formulation of constitutive laws that relate stress and strain. Theoretical considerations cover linear elastic behavior, where materials return to their original shape after load removal, as well as non-linear phenomena, including plastic deformation and fracture. This discipline is fundamental to understanding material integrity, structural stability, and the design of components under mechanical stress.