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Valid for year : 2013
 
TMHL61 Damage Mechanics and Life Analysis, 6 ECTS credits.
/Materialmekanik - Skademekanik och livslängdsanalys/

For:   M   MEC  

 

Prel. scheduled hours: 60
Rec. self-study hours: 100

  Area of Education: Technology

Main field of studies: Mechanical Engineering

  Advancement level (G1, G2, A): A

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


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.
Organisation:
Lectures, teaching classes and laboratory work.
Course contents:
The course contains two main parts: 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

Course literature:
T Dahlberg and A Ekberg: Failure, Fracture, Fatigue - An Intrduction. Studentlitteratur, Lund 2009.

Examination:
One written examination
Laborations
 5 ECTS
1 ECTS
 


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

Linköping Institute of Technology
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Contact: TFK , val@tfk.liu.se
Last updated: 11/14/2012