This book aims to bring together continuum elasticity theory, electronic structure and the concept of fractals as applied to roughness and toughness of metals. .
Of course, a major contribution to fracture was made by Griffith, in which, though incomplete for reasons that are now largely understood, he derived an expression for the limiting strength of a material. This involved intimately the surface energy, which subsequently, at least in a simple metal like A1 with s and p electrons, has been

Preface .
1 Background and Some Concepts
1.1. Elastic and Plastic Regimes
1.2. Griffith Criterion: Role of Surfaces
1.3. Peierls Stress and Barrier
1.4. Dislocation Core and Atomic Force
1.5. Stacking Faults
1.6. Glissile and Sessile Dislocations
1.7. Concept of Fractals
1.8. 'Glue'and Related Models of Interatomic Force Fields
1.9. Pair potetials
1.10. Grain and Twin Boundaries
1.11. Alloy Formation: Rules and Models
1.12. Friction Mechanisms
2 Phenomenology and Experiments
2.1. Plastic Deformation of bcc Metals
2.2. Phonons， Electrons and Plasticity
2.3. High Temperature Strength of Alloys
2.4. The Crack and Fracture
2.5. Power Law Relation between the Plastic Strain and the
2.6. Statistical Behaviour for the Fracture of Disordered Media
2.7. The Roughness of the Crack Surface
2.8. Dynamic Instabilties of Fracture
3 Introduction to Extended Defects and Mechanical Strength
3.1 Some Basic Theory of Crystal Dislocations
3.2 Elastic Field of Straight Dislocation
3.3 Interactions of Dislocation with Other Defects
3.4 Crystal Lattice Effects
3.5 Dislocation Motion over Peierls Barrier
……
4 Some Caracteristic Features of Fractals
5 Elastic Moduli and More General Phonon Properties
6 Elements of Electronic Structure Theory
7 Theory of Pair Potential in Simple s-p Metals
8 Transcending Pair Potetials:Glue Models of Interatomic Forces
9 Positron Annihoilation:Experiment and Theory
10 Stretched Chemical Bonds,Electron Correlation and Extended Defect Propagetion