Introduction: Materials Under Stress

摘要: This chapter describes the state of art in prediction material failure as articulated national standards and specifications, used practice engineering companies. The reviews background material, symbols, terminology related to materials under stress. A fundamental way obtain information about mechanical properties a is record its stress–strain curve, usually by applying gradually increasing tensile strain specimen constant cross section. focuses on deformation stress, but emphasizes upon brittle fracture fatigue including ductile certain tribological modes such fretting fatigue. Material can be determined with precision only two rather special cases. first simple tension, described curve: second propagation pre-existing cracks, linear elastic mechanics (LEFM).. use computer-based methods finite element analysis (FEA) also discussed. highlights traditional solid prediction.