| TMHL61 | Damage Mechanics and Life Analysis, 6 ECTS-points /Skademekanik och livslängdsanalys/ Advancement level: D | |
| Aim: The purpose of the course is to provide knowledge about the effect of damage (for example cracks) on the load tolerance of a design, as well as knowledge about life analysis of materials exposed to variable loadings.Prerequisites: Solid Mechanics: introductory course, Solid Mechanics: the finite element method.Course content: The course consists of two main sections: 1. Introductory fracture mechanics; Energy aspects of crack growth, stress intensity factor, fracture toughness, crack initiation, plastic zone, stable/unstable crack growth and crack growth with cyclical load (Paris' law). 2. Fatigue; Crack initiation and growth, fatigue limit. S-N diagram, threshold value, notch effect, multiaxial stress state, variable load amplitude, crack closure, individual overloads, life calculation (damage mechanics, cumulative damage theories), load characteristics (load analysis, load statistics, cycle counting methods). Special problems in fatigue: low cycle fatigue. Course literature: Fracture Mechanics: T Dahlberg: Fracture Mechanics, LiTH-IKP-S-470. Fatigue: T Dahlberg: Material Fatigue, LiTH-IKP-S-459 | ||
| TENA | Written examination, 3,5 p. | |
| LABA | Laboratory work, ,5 p. | |