Fracture Mechanics and Fatigue

2018/2019

Content, progress and pedagogy of the module

Learning objectives

Knowledge

  • Have gained a comprehensive understanding of fracture mechanics.
  • Have gained knowledge in applying classical methods in designing against fatigue fracture by studying notches and their effect, by studying strain-fatigue, and by analysing eigen-stress states.
  • Have gained an understanding of how to apply fracture mechanics in the assessment of reliability of practical designs and machine elements.

Skills

  • Be able to assess the stability of cracks using Griffith’s and Irwin’s fracture criteria, energy release rate, and toughness concepts
  • Be able to apply linear elastic solutions for sharp cracks and obtain the stress intensity factor.
  • Be able to assess mixed mode loading and apply crack growth direction hypotheses
  • Be able to assess crack growth by fatigue, partial damage and load spectra.
  • Be able to assess crack initiation, notches and their effect.
  • Be able to determine life time and apply methods for improving the fatigue strength and life time of machine elements and welded details.

Competences

  • Be able to understand and apply linear elastic concepts in assessing the stability of cracked structures under static and fatigue loading.
  • Be able to distinguish between different fatigue regimes, i.e. elastic or plastic, and un-cracked or pre-cracked, and apply correct methodology to each case in relevant structures.
  • Be able to determine the lifetime of welded components, and explain fatigue in welded components on the basis of fracture mechanical concepts.

Type of instruction

The teaching is organized in accordance with the general form of teaching. Please see the programme cirruculum §17.

Extent and expected workload

Since it is a 5 ECTS course module the expected workload is 150 hours for the student.

Exam

Exams

Name of examFracture Mechanics and Fatigue
Type of exam
Oral exam
ECTS5
Assessment7-point grading scale
Type of gradingInternal examination

Facts about the module

Danish titleBrudmekanik og udmattelse
Module codeM-MAT-K1-5
Module typeCourse
Duration1 semester
SemesterAutumn
ECTS5
Language of instructionEnglish
Empty-place SchemeYes
Location of the lectureCampus Aalborg
Responsible for the module

Organisation

Study BoardStudy Board of Industry and Global Business Development
FacultyFaculty of Engineering and Science