Leader: Y-B Cheng

Offered

Clayton First semester 2008 (Day)

Synopsis

Normal and shear stresses in three dimensions. Mohrs circle for stress in two and three dimensions. Strain state analysis, normal, shear , principal and volumetric strains. Invariants of stress and strain. Linear elasticity. Visco-elasticity. Yielding criteria. Strain rate and temperature effects. Power-law deformation. Work hardening and hardening coefficient. True and engineering stress strain curves. Influence of the loading path on mechanical properties. Brittle failure. Yielding and yield point phenomena. Stress concentrations. Irwin analysis of stress around a crack. Fracture toughness. Griffith analysis. Phenomenological and classical theories of fracture.

Objectives

1. An understanding of stress and elastic strain
2. knowledge on elastic, visco-elastic and plastic deformation of materials
3. appreciation of mechanical testing techniques
4. basic knowledge on the fracture mechanics of materials.

Assessment

Examination (3 hours): 60%
Assignments: 30%
Laboratory work: 10%

Contact hours

36 lecture/practice classes, 3 laboratory experiments