Fracture Mechanics MATRL 234/ ME 275

Course Outline

1. Introduction 2. Linear elastic fracture mechanics

2.1 Stress Intensity factors in Mode I, II and III 2.2 Complex variable and Westergaard representation. 2.3 Energy approach to elastic fracture and relation to stress intensity factors 2.4 Energy methods for determining K and G 2.5 Weight function analysis 2.6 Green's function method

3. Elastic-plastic fracture

3.1 Crack tip plasticity and the concept of small scale yielding (s.s.y.) 3.2 The J-integral 3.3 Crack tip fields and elastic plastic solutions in s.s.y. 3.4 The Dugdale-Barenblatt model. 3.5 Relation between CTOD and J. 3.6 R-curves

4. Fatigue

4.1 Fatigue crack growth under constant amplitude loading 4.2 Fatigue crack growth under variable amplitude loading 4.3 Fatigue crack initiation 4.4 Notch fatigue: Neuber's rule

5. Fracture mechanism maps

Grading scheme: 30%: Homeworks 70%: Final Exam Vikram Deshpande (vsd@engineering.ucsb.edu) Office: 2361C Tel. No. Extn. 2594 Office hours: Ideally just send an email to fix a time.