Course detail

Micromechanics of Material

FSI-RMMAcad. year: 2014/2015

The course is devoted to the micromechanics of deformation and fracture of classical and advanced structural materials as well as to materials used in mechantronic systems. The emphasise is given to understanding the physical background of differences in mechanical behaviour of basic types of materials (metals, ceramics and polymers). In the introductory part, fundaments concerning interatomic bonds, atomic and molecular structure and defects in crystals are discussed. The elastic deformation and micromechanisms of plastic deformation are described for both single crystals and polycrystals. Moreover, principles of fracture mechanics and physical micromechanisms are explained for basic types of materials. The final passage is focused on relationships between microstructure and mechanical properties in special materials. The subject matter given in lectures and training courses is available in extended textbooks.
Students get knowledge of microstructural reasons of different mechanical properties of basic kinds of materials. They learn principles of advanced technology leading to materials of special properties. In the training courses they acquire physical approaches to the assessment of microstructure and mechanical properties of materials.

Language of instruction

Czech

Number of ECTS credits

Mode of study

Not applicable.

Guarantor

prof. RNDr. Jaroslav Pokluda, CSc.

Department

Institute of Physical Engineering (ÚFI)

Learning outcomes of the course unit

Students get knowledge in microstructural reasons for different mechanical properties of metals, ceramics and polymers and, moreover, in advanced technologies improving properties of advanced engineering materials. They learn physical approaches to investigation of materials properties by solving working examples.

Prerequisites

Basic knowledge of materials engineering, physics and mathematics are expected.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.

Assesment methods and criteria linked to learning outcomes

The examination is based on the test associated, when necessary, with an oral discussion of its results. A necessary condition is rather inedpendent solution of, at least, one of working examples during the training part of the course.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

The aim of the course is to present a self-contained overview of basic micromechanisms of deformation and fracture operating in fundamental classes of materials (metals, ceramics and polymers) as well as in advanced engineering materials.

Specification of controlled education, way of implementation and compensation for absences

The presence in the training part of the course is obligatory and it is controlled by the teacher. The way of compansation of a missed subject matter depends on its extend and content.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

J. Pokluda et al.: Mechanické vlastnosti a struktura pevných látek. PC DIR Brno 1994.
J. Pokluda et al.: Sbírka úloh a návodů ke cvičení. Sylaby, 1997

Recommended reading

A.Kelly, A.H.Macmillan: Strong Solids. Clarendon Press, Oxford 1986.
B. Meissner, V. Zilvar : Fyzika polymerů. SNTL/ALFA, Praha 1987.
J.Menčík: Pevnost a lom skla a keramiky. SNTL Praha 1990.

Classification of course in study plans

  • Programme B3901-3 Bachelor's

    branch B-MET , 3 year of study, winter semester, compulsory-optional

Type of course unit

 

Lecture

39 hod., optionally

Teacher / Lecturer

prof. RNDr. Jaroslav Pokluda, CSc.

Syllabus

1. Bonds in solids
1.1 Ion bond
1.2 Covalent bond
1.3 Metallic bond
1.4 Van der Waals bond
2. Structure of perfect crystals
2.1 Crystal structures and symmetries in 2D and 3D
2.2 Indices of directions and planes, reciprocal lattice
3. Defects in crystals
3.1 Point defects and difusion
3.2 Dislocations in simple lattice
3.3 Dislocations in real lattices
3.4 Stecking faults, grain boundaries and precipitates
3.5 Interaction of dislocations with other defects
4. Elastic deformation
5.1 Hooks law
5.2 Thermal stresses
5.3 Theoretical strength
5. Micromechanics of plastic deformation of crystalline materials
5.1 Slip systems and Schmid law
5.2 Strengthening of monocrystals
5.3 Strengthening of polycrystals
6. Fundaments of fracture mechanics
6.1 Griffith criterium
6.2 Linear-elastic fracture mechanics
6.3 Plastic zone at crack tipe
6.4 Elastic-plastic fracture mechanics
7. Fracture micromechanics of metalls and ceramics
7.1 Ductile fracture
7.2 Brittle fracture
7.3 Fatigue
7.4 Creep
7.5 Environmental effects on fracture
8. Mikromechanics of deformation and fracture of polymers
8.1 Microstructure of polymers
8.2 Viscoelasticity
8.3 Fracture of polymers
9. Micromechanics of advanced structural and mechatronic materials
9.1 Nanomaterials
9.2 Transformation toughned ceramics
9.3 Smart materials
10. Deformation and fracture of composits
10.1 Basic composite types
10.2 Basic mechanical properties
10.3 Micromechanics of damage

Computer-assisted exercise

13 hod., compulsory

Teacher / Lecturer

prof. RNDr. Jaroslav Pokluda, CSc.

Syllabus

-2 Crystalography (excercises)
3 Defects in crystals(excercises)
4-5 Introduction to fracture mechanics (excercises)
6-7 Internal friction in materials (laboratory experiment)
8-9 Evaluation of grain size (standards and computer simulation)
10-11 Fatigue crack growth curves and fractography (evaluation methods and computer processing)
12-13 Excursion to aboratories of the Institute of Physics of Materials, Academy of Sciences of the Czech Republic, in Brno