| TMHL61 |
Damage Mechanics and Life Analysis, 6 ECTS credits.
/Materialmekanik - Skademekanik och livslängdsanalys/
For:
AER
I
Ii
M
MEC
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Prel. scheduled
hours: 66
Rec. self-study hours: 94
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Area of Education: Technology
Main field of studies: Mechanical Engineering
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Advancement level
(G1, G2, A): A
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Aim:
The aim of the course is to give the student
- a basic understanding of the effect cracks and cyclic loading may have on the life of a design
- a basic theoretical knowledge in fracture mechanics
- a basic theoretical knowledge in classic fatigue theory (HCF och LCF)
- an insight in Finite Element-based life analysis and its industrial use
- the ability to independently solve not too advanced problems of the above type analytically and by using an FE-program.
At the end of the course, the student shall be able to
- account for the theoretical basis of Fracture Mechanics and basic classic fatigue theory (HCF och LCF)
- solve not too advanced problems of the above type analytically and by using an FE-program
- give an account of how life analysis is used in the modern design process
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Prerequisites: (valid for students admitted to programmes within which the course is offered)
Linear algebra, multi-variable calculus and basic courses in Engineering Mechanics, Solid Mechanics and Engineering Materials
Note: Admission requirements for non-programme students usually also include admission requirements for the programme and threshhold requirements for progression within the programme, or corresponding.
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Organisation:
Lectures, teaching classes and laboratory work.
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Course contents:
Basic Fracture Mechanics:
- Stress field-based linear Fracture Mechanics: Stress intensity, fracture tougness.
- Applicability of linear Fracture Mechanics: Crack tip plasticity. Applicability criteria. Experimental determination of fracture toughness
- Thermodynamics: J and G. Stability
- Fatigue crack growth: Parisâ?T law. Cycle counting
Basic classic fatigue theory:
- Stress based fatigue theory (HCF): Wöhler-diagrams/SN-curves. Mean-stress effect. Haigh-diagram. Linear damage acculmulation rules. Strain based fatigue theory (LCF). Basquinâ?Ts-, Coffin-Mansonâ?Ts and Morrowâ?Ts equations. Ramberg-Osgoodâ?Ts equation. Cyclic plasticity and Masing-behaviour. Neuberâ?Ts rule
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Course literature:
T Dahlberg and A Ekberg: Failure, Fracture, Fatigue - An Intrduction. Studentlitteratur, Lund 2009.
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Examination: |
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One written examination
Laborations
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5 ECTS
1 ECTS
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Course language is Swedish/English.
Department offering the course: IEI.
Director of Studies: Peter Schmidt
Examiner: Kjell Simonsson
Link to the course homepage at the department
Course Syllabus in Swedish
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