course-details-portlet

KT8202 - Fatigue Analysis

About

Examination arrangement

Examination arrangement: Portfolio assessment
Grade: Passed/Failed

Evaluation Weighting Duration Grade deviation Examination aids
Oral examination 75/100
Approved report 25/100

Course content

Advanced treatment of low cycle and high cycle fatigue. Mechanisms involved in initiation and growth of fatigue cracks. Effects of corrosion and temperature. Material and mean strain effects. Effect of surface condition fabrication effects and surface modification to increase fatigue strength. Strain controlled fatigue, cyclic plasticity and notch effects. Fracture mechanics and fatigue: Crack growth modelling, short crack behaviour, threshold effects. Probabalistic design. Design criteria for multiaxial fatigue. Variable amplitude loading, linear og non-linear damage accumulation. Implementation of theory in design codes.

Learning outcome

The course is aimed at providing an understanding of methodologies for fatigue life assessment of mechanical components and welded structures. An introduction is given to causes of fatigue and brittle failures and mechanisms and parameters that control the development and growth of cracks. A review over traditional assessment methods based on nominal stresses and strains is given. Recent methods based on finite element analysis (FEA), such as hot-spot, notch-stress/strain and fracture mechanics for welded structures are given special consideration.

The course has the following learning objectives:

Knowledge:
Upon the completion, the candidate should have the knowledge of:
- Causes of fatigue and brittle fractures in steel, aluminium, titanium and composite materials
- Traditional methods for fatigue assessment and design against ductile and brittle fracture in welded structures and mechanical components
- FEA based methods for designing against fatigue and fracture

Proficiency / Skills:
Upon the completion, the candidate is able to:
- Establish design models and procedures based on FEA codes such as Ansys and Abaqus for fatigue design and establish safety criteria and inspection intervals for structures experiencing slow crack growth
- Design and conduct laboratory experiments for the verification of fatigue and fracture properties of components and structures
- Understand and apply standards such as Eurocode 3, Eurocode 9 and British Standard BS 7910, and guidance such as DNV RP C-203 Fatigue design of offshore structures, plus equivalent guidance from IIW – International Institute of Welding

General competence / Expertise:
Upon the completion, the candidate is able to:

- Evaluate the need for fatigue analyses as the basis for structural design and choose an effective analysis methododology
- Understand and make use of the latest scientific research in computational methods in fatigue design

Learning methods and activities

Lectures and group work.
Literature survey of assigned topic with a written report. The lectures and exercises are in English when students who do not speak Norwegian take the course. If the teaching is given in English the Examination papers will be given in English only. Students are free to choose Norwegian or English for written assessments. To pass the course a score of at least 70 percent is required.

Further on evaluation

For a re-take of an examination, all assessments during the course must be re-taken

Required previous knowledge

Prerequisite knowledge can be obtained from the following Master courses: TMM4176 Materials technology 2, TMM4160 Fracture mechanics, TMM4195 Fatigue design, TMR4200 Fatigue and fracture in marine structures, or equivalent.

Course materials

N E Dowling. Mechanical behavior of materials: engineering methods for deformation, fracture, and fatigue og P. Haagensen Compendium.

Credit reductions

Course code Reduction From To
DIB7970 7.5
More on the course

No

Facts

Version: 1
Credits:  7.5 SP
Study level: Doctoral degree level

Coursework

Term no.: 1
Teaching semester:  SPRING 2021

Language of instruction: English

Location: Trondheim

Subject area(s)
  • Technological subjects
Contact information
Course coordinator:

Department with academic responsibility
Department of Structural Engineering

Examination

Examination arrangement: Portfolio assessment

Term Status code Evaluation Weighting Examination aids Date Time Digital exam Room *
Autumn ORD Oral examination 75/100
Room Building Number of candidates
Autumn ORD Approved report 25/100
Room Building Number of candidates
Spring ORD Oral examination 75/100
Room Building Number of candidates
Spring ORD Approved report 25/100
Room Building Number of candidates
  • * The location (room) for a written examination is published 3 days before examination date. If more than one room is listed, you will find your room at Studentweb.
Examination

For more information regarding registration for examination and examination procedures, see "Innsida - Exams"

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