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- W2498821152 abstract "A resume is given and a series of aspects of the surface stress of solids are discussed. The main question is the relation between surface stress and the strength of a solid. According to my theory of fatigue, the defect growth is caused by the migration of particles into the defect due to gradients of tensile stresses. The particle flux can be reduced or stopped by stress gradients of opposite direction. In this way, the near-surface stress should be the cause of the fatigue limit of materials. In accordance with the Eqs. ( 4.4) and ( 4.6), the forces acting between the surface atoms should be strong if the corresponding forces in the bulk are strong too. From the existence of a near-surface stress follows a conditional proportionality between the strength of a solid and its surface stress. Another outcome of this book is the fact that an influence of external electric fields on the strength could exist also in such cases in which only electronic processes pass off without any transfer of atoms to or through the interface. The surface free energy reaches its minimum value if the generation of the new surface is an equilibrium process. Therefore, the experimental determination of the surface free energy of brittle materials will be problematic. Due to the generation of a surface on the body the energy levels in the bulk of the solid will also be shifted. A change of the number of electrons in the separated part of a body means the occurrence of a triboelectric process. The number of the potential wells has an influence on the values of the surface parameters." @default.
- W2498821152 created "2016-08-23" @default.
- W2498821152 creator A5078778052 @default.
- W2498821152 date "2015-01-01" @default.
- W2498821152 modified "2023-09-23" @default.
- W2498821152 title "Miscellaneous and Open Questions" @default.
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- W2498821152 doi "https://doi.org/10.1007/978-3-319-19764-7_14" @default.
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