• Dislocation-driven crystal plasticity linking lattice defects to yield, hardening, and plastic flow. Formal dislocation theories illuminate size effects, strain aging, and defect–property coupling across metals and crystals [2], [5], [7], [9], [20].

• Elasticity theory advances include nonlinear elasticity and thermoelastic effects, modeling large deformations from rubbers to metals, and elastic constants under pressure through early elasticity formulations and temperature coupling [1], [4], [6], [8], [11].

• Metallic mechanics emphasize plasticity, strain hardening, precipitation, and failure propagation; microstructure evolution and lattice-scale processes are tied to macroscopic strength and ductility [10], [13], [15], [16], [17].

• Friction and energy dissipation in solids explore thermoelastic internal friction, intrinsic friction in solids, and the frictional behavior at interfaces, forming a core tribology-oriented branch of materials mechanics [11], [12], [18].

• Crystal structure and structure–property relationships are probed via mica strength and early crystal plasticity, linking lattice organization to mechanical response and plastic properties of solids [7], [14], [19].