AAE 65400: Fracture Mechanics
Format: 3 lectures per week
Contact hours: 3
Instructor: Professor Vikas Tomar
Text: Fracture Mechanics: Fundamentals and Applications, 3rd edition, Anderson, 2005
Course Description: The objective of this course is to provide students with an introduction to the mechanics of fracture of brittle and ductile materials. Lectures will focus on the basics of linear-elastic fracture mechanics (LEFM) and elastic-plastic fracture mechanics (EPFM) including the J-Integral. Time dependent fracture including creep and fatigue crack growth will be covered. Methods to experimental determine fracture properties (ASTM standards) will be introduced.
Pre-requisite: AAE 55300 or equivalent
Necessary Background: Linear Algebra, Elasticity, Differential and Integral Calculus
- Final project
Course Topics: Basic fracture mechanics, atomic view of fracture, Griffith energy criterion, energy release rate R and driving force curves, stress analysis, crack tip plasticity, mixed mode fracture, crack tip opening displacement, J Integral, J-CTOD relationships, crack growth resistance curves, J controlled fracture, dynamic fracture, rapid crack propagation/arrest, creep crack growth, ductile/brittle failure, intergranular fracture, failure in polymers, fracture in ceramics, experimental fracture testing methods, elastic-plastic testing methods, dynamic testing, fracture testing of polymers, testing of composite and ceramics, stress corrosion cracking, hydrogen embrittlement.
At the end of course the students will have fundamental understanding of the following: Introduction to the mechanics of fracture of brittle and ductile materials. Linear elastic fracture mechanics; elastic-plastic fracture; fracture testing; numerical methods; composite materials; creep and fatigue fracture.
Student Learning Outcomes: On completing this course, the student shall be able to: 1. Interpret ASTM tests for fracture toughness 2. Run basic finite element analyses for crack propagation 3. Understand stress intensity factor, J-Integral, CTOD, R-Curves, Energy release rate related concepts 4. Understand fracture mechanisms in different material types and at different loading rates 5. Apply fundamental understanding of concepts to basic engineering problems
Revision History: Revised Fall 2016
Prepared by: Prof. Vikas Tomar