Physical Base of Materials Fracture (FSI-9FZM)

Academic year 2021/2022
Supervisor: prof. RNDr. Jaroslav Pokluda, CSc.  
Supervising institute: ÚFI all courses guaranted by this institute
Teaching language: Czech
Aims of the course unit:
The aim of the course is to present a physical interpretation of differences between mechanical properties of metals, ceramics and polymers and, in particular, to mention a possibility of quantitative description of some common deformation and fracture micromechanisms. Students are guided to a physical art of thinking about fracture processes in materials.
Learning outcomes and competences:
Graduates accuire knowledge about the microstructure, capabilities and limits of mechanical properties of basic kinds of materials for the purposes of engineering design and technology. They gain a valuable experience with a physical view on the world of engineering materials. Moreover, they would better understand microscopical processes operating during their fracture.
Prerequisites:
Fundaments of physics, chemistry, mathematics and materials engineering.
Course contents:
Diffences between processes of deformation and fracture, and between resulting mechanical properties of metals, ceramics and polymers, come from their different microstructure. The course includes passages dealing with the microstructure of basic material types and describing individual damage stages leading to the fracture under various external conditions. The emphasize is given on the understanding of physics of micromechanisms operating in the individual fracture processes and on relationships between microstructure and mechanical characteristics of materials. It enables us to make qualified decisions about the suitabillity of a given structural material based on its microstructural and mechanical characteristics and, in particular, to assess the risk of fracture of structural components during their exploitation.
Presentation is made by combination of computer animation and classical methods (overheads and blackboard.
Teaching methods and criteria:
The course is taught through lectures explaining the basic principles and theory of the discipline.
Assesment methods and criteria linked to learning outcomes:
Knowledge of the subject matter at least in the range of the reference No. 1. Examination in the form of the test.
Controlled participation in lessons:
The presence on seminars is recommended but not obligatory.
Type of course unit:
    Lecture  10 × 2 hrs. optionally                  
Course curriculum:
    Lecture 1. Structure of materials
1.1 Bonds in solids
1.2 Structure of perfect crystals
1.3 Crystal defects
1.4 Structure of polymers
2. Deformation of metals
2.1. Elastic and anelastic deformation
2.2 Plastic deformation
2.3 Theory of strengthening
3. Fracture of metals
3.1 Fundaments of fracture mechanics
3.2 Ductile fracture
3.3 Brittle fracture
3.4 Stress corrosion cracking
3.5 Fatigue fracture
3.6 Creep fracture
4. Deformation and fracture of ceramics
4.1. Deformation of monocrystals
4.2. Deformation of polycrystals
4.3. Strength and fracture toughness
4.4. Fracture after long-term degradation
5. Deformation and fracture of polymers
5.1. Micromechanisms a phenomenology of deformation
5.2. Mechanical properties and fracture of basic polymer types

Literature - fundamental:
1. J. Pokluda, F. Kroupa, L. Obdržálek: Mechanické vlastnosti a struktura pevných látek. PC DIR Brno, 1994.
2. J. Menčík: Pevnost a lom skla a keramiky. SNTL Praha 1990
3. B. Meissner, V. Zilvar: Fyzika polymerů. SNTL/ALFA Praha 1987.
4. J. Pokluda, P. Šandera: Micromechanisms of Fracture and Fatigue: In a Multiscale Context. kniha, Springer, London 2010.
5. A. Saxena: Advanced Fracture Mechanics and Structural Integrity, CRC Press 2019
Literature - recommended:
1. A. Kelly, N. H. Macmillan: Strong Solids. Clarendon Press Oxford 1986.
2. P. Kratochvíl, P. Lukáč, B. Sprušil: Úvod do fyziky kovů I. SNTL/ALFA Praha.
3. S. Suresh: Fatigue of Materials. Cambridge Univ. Press, 1998.
The study programmes with the given course:
Programme Study form Branch Spec. Final classification   Course-unit credits     Obligation     Level     Year     Semester  
D-MAT-P full-time study --- no specialisation -- DrEx 0 Recommended course 3 1 S
D-APM-P full-time study --- -- DrEx 0 Recommended course 3 1 S
D-APM-K combined study --- -- DrEx 0 Recommended course 3 1 S
D-MAT-K combined study --- no specialisation -- DrEx 0 Recommended course 3 1 S