MDM516 INTRODUCTION TO FRACTURE MECHANICS AND FATIGUE
| Course Code: | 8760516 |
| METU Credit (Theoretical-Laboratory hours/week): | 3 (3.00 - 0.00) |
| ECTS Credit: | 8.0 |
| Department: | Mechanical Design and Manufacturing |
| Language of Instruction: | English |
| Level of Study: | Graduate |
| Course Coordinator: | |
| Offered Semester: | Fall and Spring Semesters. |
Course Objectives
Course Content
Introduction;conventional failure criteria;characteristic brittle failures;Griffith`s work;fracture mechanics.Linear Elastic Stress Fields in Cracked Bodies;crack deformation modes and basic concepts;Westergaard method;crack tip stress and displacement fields; stress intensity factor solutions;three dimensional configurations.Small Scale Yielding; cracktip plastic zone ;Irwin`s model.Energy of Fracture;energy balance during crack growth;Griffith theory;energy release rate and stress intensity factor;crack stability. Critical Stress Intensity Factor Fracture Criterion;fracture criterion;fracture toughness;micromechanics of fracture;experimental determination of KIc;R-curves.Fatigue crack growth;constant amplitude loading;fatigue life prediction using stress intensity factor;variable amplitude loading;retardation; Wheeler`s model;fatigue design philosophies; damage tolerance methodology;fatigue crack behavior in the presence of residual stress;environmentally enhanced fatigue crack propagation (corrossion fatigue). Computational fracture mechanics.