CHAPTER 1 AXIAL TENSION AND COMPRESSION D s1-1 Concepts and practical examples of axial tension and compression □]§1-2 Internal force、 method of section、 axial force and its diagram D 81-3 Stresses on the section and strength conditions 81-4 Deformation of the rod in axial tension and compression law of elasticity D$1-5 Elastic strain energy of the rod in axial tension and compression 81-6 Statically indeterminate problems and their treatment methods of axial tension and compression $ 1-7 Mechanical properties of materials in axial tension and compressionCHAPTER 1 AXIAL TENSION AND COMPRESSION §1–1 Concepts and practical examples of axial tension and compression §1–2 Internal force、method of section、axial force and its diagram §1–3 Stresses on the section and strength conditions §1-4 Deformation of the rod in axial tension and compression  law of elasticity §1-5 Elastic strain energy of the rod in axial tension and compression §1-6 Statically indeterminate problems and their treatment methods of axial tension and compression §1-7 Mechanical properties of materials in axial tension and compression 3