Newly proposed atomic model generates 4 kinds of rotational electro-magnetic waves(leftwise positive, leftwise negative, rightwise positive and rightwise negative). The atomic bonding force produces elastic deformation. The increasing energy makes plastic deformation(Laplacian), strain - hardening and rightwise positive. The rightwise positive produces ductile fractures. The micro plastic deformations of grain boundaries generate fatigue, creep and thermal fatigue, which are caused by rightwise positive. It does matter between each tests conclusively, especially uniaxial tensile one. Accumulation of rightwise positive makes fatigue at constant stress and undulating one. Plastic deformations is pure shear at any mean stress always.
목차
Abstract 1. Elastic Deformation 2. Plastic Deformation 3. Strain - hardening and Ductile Fracture 4. Fatigue, Creep and Thermal Fatigue 5. Discussions and Conclusions References
저자
Hungkuk Oh [ Dept of Mechanical engineering, Ajou University South Korea ]
Corresponding author
Yejoon Kim [ Dept of Mechanical engineering, Ajou University South Korea ]