Solid mechanics is the branch of continuum mechanics that studies the behaviour of solid materials, especially their deformation under the action of forces, temperature changes, phase changes and other external and internal agents.Solid mechanics is fundamental for civil engineering, mechanical engineering and aerospace engineering. Solid mechanics extensively uses tensors to describe stresses, strains and relation between them.Solid mechanics examines the shear stress, bending stress, deformation and the failure of solid materials and structures.Solid mechanics is a vast subject because of the wide range of solid materials available and their multiple applicationsThe study of solid mechanics includes various methods to calculate the stresses and strains in structural members such as beams, columns and shafts.Solid mechanics is also known as Mechanics of solids or Mechanics of structures or Strength of materials.Our hope is that this book, through its careful explanations of concepts, practical examples and figures bridges the gap between knowledge and proper application of that knowledge.