Fatigue of Materials

Garant předmětu:

Lecturer:

Tutor:

Supervisor:

Department of Materials

Synopsis:

Abstract:

Lectures are concerned with explanation of conditions, causes and mechanisms of fatigue damage, as well as material fatigue characteristics, diagrams, equations and computational algorithms.

Requirements:

Syllabus of lectures:

Outline:

I. Failure processes - overview

II. Fatigue of materials

1. Low-cycle fatigue

1.1 Cyclic stress-strain curve

1.2 Crack nucleation

1.3 Manson-Coffin law

1.4 Energetic hypothesis (Kliman)

2. High-cycle fatigue

2.1 Wöhler curve, Smith diagram

2.2 The effect of surface, size, stress concentration, environment, temperature

2.3 Damage cumulation – Miner hypothesis

3. Fatigue crack growth

3.1 Crack growth laws

3.2 Interaction effects

3.3 Models Wheeler, Willenborg, Preffas, Onera, etc.

3.4 Crack growth as a local low-cycle fatigue process

4. Cyclic loading

4.1 Loading cycle and process

4.2 Markov models

4.3 Rainflow cycle counting

5. Statistical evaluation of fatigue experiments

5.1 Statistical analysis of lifetime data

5.2 Statistical analysis of dependence v-deltaK

5.3 Probabilistic models of fatigue crack growth

6. Examples: screw, shaft, etc.

Keywords:

fatigue of materials and structures, cyclic plasticity, crack initiation, crack growth, fatigue limit

Syllabus of tutorials:

Study Objective:

Study materials:

Key references:

[1] Schijve, J.: Fatigue of Structures and Materials. Springer 2009.

[2] Suresh, S.: Fatigue of Materials. Cambridge India 2015.

Recommended references:

[3] Laird, C.: Fatigue. In: Physical Metallurgy, R.W.Cahn and P.Haasen, eds. Elsevier Science BV 1996, pp.2294-2397.

[4] Várkoly, L., Zuidema, J., Várkolyová, B., Chalupová, M.: Fatigue Failure of Materials. TU Delft - Žilinská univerzita 1998.

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Fyzikální inženýrství materiálů (compulsory course in the program)