1.
Theory of Plasticity
The flow curve, yielding criteria (Von Mises and
Tresca), combined stress tests, the yield locus, octahedral shear stress and
shear strain, invariant of stress and strain, plastic stress-strain
relationship (Levy-Mises equation).
2.
Fracture Mechanics
Types of fracture in metals, theoretical cohesive
strength of metals, stress concentration, Griffith theory of brittle fracture,
energy release rate, stress analysis at crack tip and modes of loading,
fracture toughness (plane strain fracture toughness, kic ), and crack tip
plastic zone size estimation.
3.
Fatigue of Metals
Stress cycle, fatigue fracture surface, the s-n curve,
effective stress concentration factor, design for finite life (laws of Goodman,
Gerber and Soderberg), design for finite life (Basquin's law), cumulative
damage and life prediction (Miner's law), fatigue crack initiation and
propagation, and fatigue life calculations (Paris equation).
- Creep of Metals
The creep phenomenon, creep curve, presentation of crep
data, Larson-Miller plot, the life fraction rule, mechanism of creep
deformation and rupture and steady state creep.
