2017 Fracture of Metals

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Academic unit or major
Metallurgical Engineering
Muraishi Shinji  Inamura Tomonari 
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Course description and aims

This course focuses on the fundamental concepts of the fracture mechanics that describes the strength of the structural materials with a crack.

The reason why the ideal strength is not obtained in the real materials is explained. The condition for the crack propagation is shown by the energy of the crack. The stress intensity factor is defined and applied to some problems about fracture.

Student learning outcomes

1) Have an understanding of the condition for crack propagation.
2) Have an understanding of the stress intensity factor.
3) Have an understanding of the fracture toughness testing.


brittle fracture, ideal strength, crack, energy release rate, Griffith crack theory, fracture toughness, stress intensity factor, small scale yielding, fracture toughness testing, damage-tolerant design

Competencies that will be developed

Specialist skills Intercultural skills Communication skills Critical thinking skills Practical and/or problem-solving skills

Class flow

1) Attendance is taken in every class.
2) Towards the end of class, students are given exercise problems related to what is taught on that day to solve.

Course schedule/Required learning

  Course schedule Required learning
Class 1 Introduction to the fracture mechanics Explain the ideal strength
Class 2 Energy of crack 1 Explain the Orowan crack theory
Class 3 Energy of crack 2 Explain the Griffith crack theory
Class 4 Stress intensity factor Explain the stress intensity factor
Class 5 Small scale yielding Explain the small scale yielding condition
Class 6 Fracture toughness testing Explain the fracture toughness testing
Class 7 damage-tolerant design Explain the damage-tolerant design


None required

Reference books, course materials, etc.

Course materials are provided during class.

Assessment criteria and methods

Student's course scores are based on final exam (50%), exercise problems (25%) and attendence (25%).

Related courses

  • ZUF.M309 : Fatigue of Metals

Prerequisites (i.e., required knowledge, skills, courses, etc.)

No prerequisites are necessary, but enrollment in the related courses is desirable.

Contact information (e-mail and phone)    Notice : Please replace from "[at]" to "@"(half-width character).

Tomonari Inamura, inamura.t.aa[at]m.titech.ac.jp

Office hours

Contact by e-mail in advance to schedule an appointment.

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