Strength and Fracture of Materials
TeachersISOGAI, TakeshiStaffInfo
Grade, SemesterYear 3 2nd semest [Department of Mechanical and Precision System, Faculty of Science and Engineering]
CategorySpecial Subjects
Elective, CreditsElective 2credit
 Syllabus Number1F303

Course Description

In this course, the following topics are studied;
(1) Basic concept of the strength and fracture of materials
(2) Understanding of the different types of fracture such as yielding, brittle fracture, fatigue, creep, corrosion, and the interaction among them
(3) Unified concept on fracture, which pays attention to metals, ceramics, polymers and composite materials
(4) Basis of linear fracture mechanics

Course Objectives

The objective of the course is to provide students with a basic understanding of strengthand fracture of materials.

Grading Policy

Your overall grade in the class will be decided based on followings:
-  Term-end examinination (60%)
-  Mini tests in the class (25%)
-  "Self-made resume" submitted in the 15th lesson (15%)
Feedback will be given by commentary of the mini tests during class.

Textbook and Reference

TextbookStrength and Fracture of Materials
Akihiro Tsuchida, Akira UenoCorona Company (2011) ISBN 978-4-339-04476-8
ReferencesIntroduction to engineering materialsM. F. Ashby, translated by Yoshinori Horiuchi, Uchida Roukanho Publication (1999) ISBN 4-7536-5093-6
ReferencesStrength and Fracture of MaterialsEdited by The Japan Society for Materials ScienceJapan Society for Materials Science (2005)  ISBN 4-901381-26-1
ReferencesStrength and Fracture of Materials (2nd Edition)Takeo YokohoriIwanami Shoten (1974) * * Please use it in the library etc. due to out of print


Please review the foundation of materials science studied in "Engineering Material 1" and foundation of mechanics of materials studied in "Strength of Materials 1" before attending class.
Please read the relevant part of the textbook before each lesson. (1.5 hours)
Please review the important items you learned in class by using texts and notes. Please answer the exercises again. (1.5 hours)
As preparatory learning on the 15th lesson, the main points (regime) of the contents learned in the 1st to the 14th lesson are summarized into a designated paper of A4 size. This "Self-made resume" can be used in term-end examination.
Preparation other than above will be instructed in class.


The diagrams/tables will be presented by using a projector and explanations will be added on the blackboard. It is important to acquire the habit of noting important matters by the students. Handwritten notes can be brought with the "handwritten regime" at term-end exam.


1Introduction to "Strength and Fracture of Materials": What is Strength and Fracture of Materials? Ideal strength, Diversity and similarity of fracture
2Strength of materials under statig loading 1: Tensile test, Yielding, Work hardening
3Strength of materials under statig loading 2: Plastic deformation, Dislocation, Slip deformation
4Strength of materials under statig loading 3: Material strengthening method, Ductile fracture, Brittle fracture
5Foundations of elastic mechanics: Equilibrium equation of stress, Relationship between strain and displacement, Generalized Hook's law
6Introduction to fracture mechanics 1: Stress intensity factor, Stress field near the crack tip
7Introduction to fracture mechanics 2: Plasticity ahead of the crack tip, Correction of Irwin, Correction of Dagdale
8Introduction to fracture mechanics 3: Energy release rate, Fracture toughness test
9Fatigue 1: Historical fatigue accident, High cycle fatigue and Low cycle, SN curve
10Fatigue 2: Fatigue crack growth, Threshould stress intensity factor
11Strength of materials at high temperature 1: Creep deformation, Creep damage, Mechanism of creep
12Strength of materials at high temperature 2: Life estimation method, High temperature fatigue, Creep fatigue interactions
13Environmental strength: Oxidation, Stress corrosion cracking, Corrosion fatigue
14Application of statistics to the strength of materials: Foundation of statistics, Reliability, Statistical properties on strength of materials, Normal distribution, Weibull distribution, Application of statistics to strength of materials
15Overall summary and Term-end examination