Welcome to my channel consisting complete lectures of mechanics of solids, Structural analysis and Reinforced concrete design as playlists in order. In this video there is explanation of basic concept of strains or the meaning of strains, what is strain, types of strains and the illustrations showing action of strains and their mathematical relationships in 1D and 2D analysis and relationship between stress and strain and compatibility equation idea . What is STRAIN? Concept of strains and their types normal strain and shear strain normal strain symbol shear strain equation shear strain formula shear strain definition normal strain units strain stress pl/ae equation Subscribe for more and share .