MECH ENG 4120 - Fracture Mechanics

North Terrace Campus - Semester 2 - 2016

The course information on this page is being finalised for 2016. Please check again before classes commence.

The focus of this course is to develop an understanding of the mechanics of fracture of engineering materials and structures under static and dynamic loading. Students will be taught the principles of linear elastic and elastic-plastic fracture mechanics and their application to engineering design. This course will also introduce key applications of fracture mechanics in industry including damage detection, failure analysis, and experimental techniques.

  • General Course Information
    Course Details
    Course Code MECH ENG 4120
    Course Fracture Mechanics
    Coordinating Unit School of Mechanical Engineering
    Term Semester 2
    Level Undergraduate
    Location/s North Terrace Campus
    Units 3
    Contact Up to 4 hours per week
    Available for Study Abroad and Exchange Y
    Assumed Knowledge MATHS 2202, MECH ENG 2002 & MECH ENG 3030 (or equivalent)
    Course Description The focus of this course is to develop an understanding of the mechanics of fracture of engineering materials and structures under static and dynamic loading. Students will be taught the principles of linear elastic and elastic-plastic fracture mechanics and their application to engineering design. This course will also introduce key applications of fracture mechanics in industry including damage detection, failure analysis, and experimental techniques.
    Course Staff

    Course Coordinator: Dr John Codrington

    Course Coordinator: A/Prof Andrei Kotousov

    Lecturers: Mr Aditya Khanna and A/Prof Andrei Kotousov

    Teaching Assistants: Mr Zhuang He and Mr Anthony Roccisano

    Student and Program Support Officer: Ms Tracy Miller

    Course Timetable

    The full timetable of all activities for this course can be accessed from Course Planner.

    Each week consists of lectures and tutorial/lab classes. Further details will be provided in the lectures.

  • Learning Outcomes
    Course Learning Outcomes

    The aim of this course is to develop an understanding of the mechanics of fracture of engineering materials and structures under static and dynamic loading. This understanding is essential for the assessment of integrity and durability of structures and structural components in the presence of structural defects, so as to ensure reliability and safety. At the completion of the course, students will:

    1 Have a solid foundation in the theory, concepts and principles of fracture mechanics,
    2 Be gaining the physical intuition necessary to idealise a complicated practical problem,
    3 Possess the analytical and computational tools needed to solve the idealised problem,
    4 Have acquired the judgment required to interpret the results of these solutions,
    5 Be able to use these solutions to guide a corresponding design, manufacture, or failure analysis and,
    6 Be able to work independently and as part of a team in order to implement their skills and knowledge in both theoretical and practical applications.
    University Graduate Attributes

    No information currently available.

  • Learning Resources
    Required Resources

    Extensive lecture notes are provided. The purchase of text-books is not necessary for the successful completion of this course though it is encouraged for extra learning.

    Electronic copies of the lecture notes as well as any additional material provided in-class will be available through the online myuni system.

    Recommended Resources

    Many suitable text-books are available for further reading through the University of Adelaide Library, and are available for purchase from text-book suppliers.

    Recommended reading:

    • Anderson, T.L. Fracture Mechanics – Fundamentals and Applications. CRC Press.
    • Janssen, M., Zuidema, J., Wanhill, R. Fracture Mechanics. Spon Press.
    Online Learning

    Electronic copies of the lecture notes as well as any additional material provided in-class will be available through the online myuni system. Extended study material will also be provided through the online system for students keen to gain further knowledge and application.

  • Learning & Teaching Activities
    Learning & Teaching Modes

    Course material is delivered through lectures, which are supported each week by problem-solving tutorials and lab classes. The regular lab classes provide hands on experience with the material learnt in the lectures. The problem-solving tutorials give students a chance to try and solve mathematical fracture mechanics problems from each topic.

    Workload

    The information below is provided as a guide to assist students in engaging appropriately with the course requirements.

    Fracture Mechanics is a challenging subject containing a series of new concepts, theories and solution methods, which are linked like a chain. Since the subject is concept and theory intensive, the most effective way to understand the new concepts and theories is to attend the lectures and tutorials. During a lecture you can have instant interactions with the lecturer, by asking questions and thinking about questions raised by others. It is always a good idea to read the lecture notes before attending a lecture, for just a few minutes, to make sure that you know roughly the material to be covered in the lecture.

    Lectures, tutorials, and lab classes comprise of 4 hours contact time per week. The total amount of time needed each week by the student to revise lecture notes and complete the assignments/reports will vary greatly from student to student. As a rough guide, the average standard undergraduate course weekly workload for a 3 unit course is 12 hours, including contact time.

    Learning Activities Summary

    The course structure is as follows:

    INTRODUCTION AND REVIEW
    (a) What and Why Fracture Mechanics
    (b) Goals of Fracture Mechanics
    (c) Brief historical overview

    BASIC CONCEPTS OF SOLID MECHANICS
    (a) Review of the basic concept of the Solid Mechanics
    (b) Basic solutions of the Theory of Elasticity
    (c) An overview of the Theory of Plasticity

    LINEAR ELASTIC FRACTURE MECHANICS (LEFM)
    (a) Stress near the crack tip
    (b) Fracture initiation criterion
    (c) Stress intensity factor
    (d) Intro to LEFM in design

    ENERGY PRINCIPLES IN FRACTURE MECHANICS
    (a) Fracture at the atomic scale
    (b) Griffith energy balance
    (c) Strain energy release rate
    (d) Fracture analysis based on compliance

    SOLUTIONS AND METHODS FOR CALCULATING STRESS INTENSITY FACTOR
    (a) Analytical methods
    (b) Numerical methods

    ELASTIC-PLASTIC FRACTURE MECHANICS
    (a) Small-scale yielding approximation
    (b) Thickness effect of fracture toughness
    (c) Intro to Failure Assessment Diagram (FAD)
    (d) J-Integral

    FATIGUE
    (a) Stages of fatigue
    (b) Total life approaches
    (c) Fatigue crack propagation
    (d) Factors influencing fatigue crack growth
    (e) Plasticity effects on fatigue

    DYNAMIC FRACTURE
    (a) Stability and the R-curve
    (b) Rapid crack propagation
    (c) High strain rate initiation
    (c) Creep and Viscoelastic crack growth

    MECHANISMS OF FRACTURE & FATIGUE
    (a) Fracture mechanisms in metals
    (b) Fatigue mechanisms in metals
    (c) Fracture in non-metals

    EXPERIMENTAL METHODS IN FRACTURE AND FATIGUE
    (a) Standard fracture specimens
    (b) Test methods and testing standards
    (c) Dynamic fracture testing
    (d) Experimental methods to determine K

    INTRODUCTION TO FAILURE ANALYSIS
    (a) Purpose of failure analysis
    (b) Causes of failure
    (c) Carrying out failure investigations

    FRACTURE MECHANICS IN DESIGN
    (a) Fail-safe approach design approach
    (b) Safe-life design approach
    (c) Damage tolerance concept

    DAMAGE DETECTION & NON-DESTRUCTIVE EVALUATION
    (a) Why non-destructive evaluation?
    (b) Methods for non-destructive evaluation
    (c) Applications and current research

    CATCH-UP AND REVISION
    Specific Course Requirements

    There are no course specific requirements

  • Assessment

    The University's policy on Assessment for Coursework Programs is based on the following four principles:

    1. Assessment must encourage and reinforce learning.
    2. Assessment must enable robust and fair judgements about student performance.
    3. Assessment practices must be fair and equitable to students and give them the opportunity to demonstrate what they have learned.
    4. Assessment must maintain academic standards.

    Assessment Summary

    The following is an outline of the assessment for this course. Feedback on all assessments, except the final exam, will be provided to students to aid in their progress and learning. Please note that while every effort has been made to ensure that this information reflects an accurate plan, the coordinator reserves the right to make changes that ensure the continual improvement of the course. Any such changes will be made clear during the lectures and via MyUni.

    Component Weighting
    In-class tutorials 10%
    Assignments 13.4%
    Project 8%
    Lab classes 8.6%
    Final Exam 60%
    Assessment Related Requirements

    The assessment tasks listed above, with the exception of the final exam, are not compulsory and have no minimum grade requirements. However, all assessment tasks are included in the calculation of the final course grade. It should be noted that students choosing not to complete an assessment task will receive no feedback on that task or stage of the course and will severely hinder their learning.

    Assessment Detail

    Assignments and in-class tutorials are provided as part of the learning experience. Students are expected to enhance their knowledge, problem solving skills and understanding of the subject matter through completing the assignments and quizzes. The assignments and tutorials are marked, with the mark contributing to the final grade for the subject.

    The case study, fracture prediction project and lab classes allow students to consolidate and apply all of the material they have covered in the course. These assessments focus on the ability of the students to analyse a practical problem based on what they have learned in the course.

    The examination is a summative assessment and is intended to assess the students’ knowledge and understanding of the course material and how it fits into the global engineering context. The exam is open-book.

    Submission

    Submission of assignments and reports is through hardcopies via the submission boxes located on level 2 of Engineering South Building Assignment submission area. Please ensure a cover sheet is attached to all submissions.

    Course Grading

    Grades for your performance in this course will be awarded in accordance with the following scheme:

    M10 (Coursework Mark Scheme)
    Grade Mark Description
    FNS   Fail No Submission
    F 1-49 Fail
    P 50-64 Pass
    C 65-74 Credit
    D 75-84 Distinction
    HD 85-100 High Distinction
    CN   Continuing
    NFE   No Formal Examination
    RP   Result Pending

    Further details of the grades/results can be obtained from Examinations.

    Grade Descriptors are available which provide a general guide to the standard of work that is expected at each grade level. More information at Assessment for Coursework Programs.

    Final results for this course will be made available through Access Adelaide.

  • Student Feedback

    The University places a high priority on approaches to learning and teaching that enhance the student experience. Feedback is sought from students in a variety of ways including on-going engagement with staff, the use of online discussion boards and the use of Student Experience of Learning and Teaching (SELT) surveys as well as GOS surveys and Program reviews.

    SELTs are an important source of information to inform individual teaching practice, decisions about teaching duties, and course and program curriculum design. They enable the University to assess how effectively its learning environments and teaching practices facilitate student engagement and learning outcomes. Under the current SELT Policy (http://www.adelaide.edu.au/policies/101/) course SELTs are mandated and must be conducted at the conclusion of each term/semester/trimester for every course offering. Feedback on issues raised through course SELT surveys is made available to enrolled students through various resources (e.g. MyUni). In addition aggregated course SELT data is available.

  • Student Support
  • Policies & Guidelines
  • Fraud Awareness

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