### Monday, February 20, 2006

## Teaching Fracture Mechanics

At a recent committee meeting it was decided that we should be helping each other as well as the broader fracture and failure mechanics community to teach fracture mechanics. One way to acomplish this is to begin an on-line discussion of which topics to teach, how to most effectively teach various topics, which books to use, etc. It is felt that the best way to initiate this discussion is by posting syllabi. At some point we might also decide to post notes.

At present, since this blog is hosted at blogspot.com, there does not appear to be a way to post files. As this discussion develops, we might look for a different way to host the blog. In the meantime, we could just cut and paste our syllabi into the posting. My syllabus is given below.

MECHANICAL ENGINEERING 744

Engineering Fracture Mechanics

Winter Quarter 2005

[This is an introductory, graduate level course. There are typically also a few advanced undergraduates in the class. It is a 10 week class. In order to cover all the material listed below, notes are provided in PDF form and are projected during the lecture.]

Lecture: Tuesday & Thursday 10:30-11:48 PM

Professor: M. Walter, 292-6081, walter.80_at_osu.edu

Text: "Principles of Fracture Mechanics," by R.J. Sanford; Prentice Hall, 2002.

Grading:

Homework: 30%

Lab: 15%

Mid-Term Exam: 25%

Final Exam: 30%

Course Objectives, Composition and Consultation: The objectives of this course are to introduce concepts of fracture mechanics for application to engineering problems. Fracture Mechanics is generally understood to be the study of the stress/strain response and the initiation and propagation of cracks in bodies that have an existing crack. Upon completing this course students will have been exposed to concepts listed on the syllabus below. Although working and studying in groups is encouraged, all work that is submitted for grading must be your own. Situations which call into question the originality of the work will be submitted to the Committee on Academic Misconduct.

Homework: Homework problems will be assigned at the discretion of the instructor. Expect 4-5 assignments throughout the quarter.

Laboratory: One or two labs will be arranged outside of class time. A lab write-up

will be assigned, collected, and graded.

Term and Final Exams: An open-notes term exam will be given 5-6 weeks into the

quarter. The final exam will be comprehensive exam. It may consist of a short in-class

portion and a take-home portion.

Topics:

Jan. 4 Introduction to Fracture Mechanics and Linear Elasticity

Jan. 6 Linear Elasticity: 3-d Equations, 2-d Analysis

Jan. 11 Singular Stress Fields: Stress Intensity Factor; Williams Solution

Jan. 13 No Class

Jan. 18 Westergaard Solution and Applications

Jan. 20 Stress Intensity Factors for Various Geometries and Loadings (Analytical Methods)

Jan. 25 Numerical Determination of K

Jan. 27 Experimental Determination of K

Feb. 1 Stress Fields and Critical Stress Intensity Factors: specimen sizes, K-dominance

Feb. 3 Crack-Tip Plasticity: small-scale yielding

Feb. 8 Mid-Term

Feb. 10 Energy Approaches and Energy Equivalence

Feb. 15 R-Curves

Feb. 17 Fracture Toughness Testing Lab

Feb. 22 Elastic Plastic Fracture: the J-Integral and COD

Feb. 24 Elastic Plastic Fracture Mechanics Testing

Mar. 1 Micromechanisms of Fracture

Mar. 3 Fatigue Crack Growth

Mar. 8 Damage Tolerant Design

Mar. 10 Nondestructive Evaluation

At present, since this blog is hosted at blogspot.com, there does not appear to be a way to post files. As this discussion develops, we might look for a different way to host the blog. In the meantime, we could just cut and paste our syllabi into the posting. My syllabus is given below.

MECHANICAL ENGINEERING 744

Engineering Fracture Mechanics

Winter Quarter 2005

[This is an introductory, graduate level course. There are typically also a few advanced undergraduates in the class. It is a 10 week class. In order to cover all the material listed below, notes are provided in PDF form and are projected during the lecture.]

Lecture: Tuesday & Thursday 10:30-11:48 PM

Professor: M. Walter, 292-6081, walter.80_at_osu.edu

Text: "Principles of Fracture Mechanics," by R.J. Sanford; Prentice Hall, 2002.

Grading:

Homework: 30%

Lab: 15%

Mid-Term Exam: 25%

Final Exam: 30%

Course Objectives, Composition and Consultation: The objectives of this course are to introduce concepts of fracture mechanics for application to engineering problems. Fracture Mechanics is generally understood to be the study of the stress/strain response and the initiation and propagation of cracks in bodies that have an existing crack. Upon completing this course students will have been exposed to concepts listed on the syllabus below. Although working and studying in groups is encouraged, all work that is submitted for grading must be your own. Situations which call into question the originality of the work will be submitted to the Committee on Academic Misconduct.

Homework: Homework problems will be assigned at the discretion of the instructor. Expect 4-5 assignments throughout the quarter.

Laboratory: One or two labs will be arranged outside of class time. A lab write-up

will be assigned, collected, and graded.

Term and Final Exams: An open-notes term exam will be given 5-6 weeks into the

quarter. The final exam will be comprehensive exam. It may consist of a short in-class

portion and a take-home portion.

Topics:

Jan. 4 Introduction to Fracture Mechanics and Linear Elasticity

Jan. 6 Linear Elasticity: 3-d Equations, 2-d Analysis

Jan. 11 Singular Stress Fields: Stress Intensity Factor; Williams Solution

Jan. 13 No Class

Jan. 18 Westergaard Solution and Applications

Jan. 20 Stress Intensity Factors for Various Geometries and Loadings (Analytical Methods)

Jan. 25 Numerical Determination of K

Jan. 27 Experimental Determination of K

Feb. 1 Stress Fields and Critical Stress Intensity Factors: specimen sizes, K-dominance

Feb. 3 Crack-Tip Plasticity: small-scale yielding

Feb. 8 Mid-Term

Feb. 10 Energy Approaches and Energy Equivalence

Feb. 15 R-Curves

Feb. 17 Fracture Toughness Testing Lab

Feb. 22 Elastic Plastic Fracture: the J-Integral and COD

Feb. 24 Elastic Plastic Fracture Mechanics Testing

Mar. 1 Micromechanisms of Fracture

Mar. 3 Fatigue Crack Growth

Mar. 8 Damage Tolerant Design

Mar. 10 Nondestructive Evaluation

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As indicate in one of the other postings, I came across MIT's Fracture and Fatigue course. The course can be found (and downloaded) here:

http://ocw.mit.edu/OcwWeb/Materials-Science-and-Engineering/3-35Fall2003/CourseHome/index.htm

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