Course detail

Experimental Mechanics

FSI-REMAcad. year: 2014/2015

The course is concerned with the following topics: Fundamentals of methods of electrical measurement of mechanical quantities. Elaboration of continuous and discrete stochastic processes
in the time and the frequency domain. Methods for the determination of stresses and strains at a point and in a certain area of a body (especially resistance strain gages, reflection photoelasticity and brittle lacquers). Measurement of kinematic quantities, forces, torques and pressures.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Guarantor

doc. Ing. Miloš Vlk, CSc.

Department

Institute of Solid Mechanics, Mechatronics and Biomechanics (ÚMTMB)

Learning outcomes of the course unit

Students will have a clear idea of current possibilities of experimental examination of selected mechanical quantities which are necessary for reliability assessment of machines and their elements. They will acquire basic practical knowledge and experiences and will be able to formulate real requirements for these activities in specialized institutions and professionally evaluate their results.

Prerequisites

Basic knowledge of analogue and digital engineering, measurement of electrical and non-electrical quantities, mathematical statistics, mechanics of bodies, strength of materials.

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. Teaching is suplemented by practical laboratory work.

Assesment methods and criteria linked to learning outcomes

Course-unit credit requirements: active participation in the seminars, good results of elaborated laboratory exercises, solving additional tasks in case of longer excusable absence.
Examination – combined (written and oral). In written part students have to prove knowledge of basic terms, important principles and their application; in the oral part the discussion over written part and records from laboratory exercises follows. None of these must be evaluated by the failing degree F.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

The course objective is to make students familiar with current methods, instrumentation and computing technique for determination of input data which are necessary for computer modelling of machines and their elements and results verification. The course is focused especially on methods of investigation of stresses and strains, kinematic quantities, forces, torques, pressures and noise and on results elaboration using CAT/CAME systems.

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

Attendance at seminars is required. One absence can be compensated by attending a seminar with another group in the same week, or by working out of substitute assignments. More absences are compensated by additional assignments according to the instructions of the tutor.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Dally, J.W. et al.: Instrumentation for Engineering Measurements, John Wiley&Sons, New York 1984
Harris, C.M.: Shock and Vibration Handbook, McGraw Hill 1996
Kobayashi, A.S.: Handbook on Experimental Mechanics., Prentice Hall, New Jersey 1987

Recommended reading

Janíček P., Technický experiment. VUT FS Brno 1988
Miláček, S.: Měření a vyhodnocování mechanických veličin, ČVUT Praha 2001
Vlk M. et al., Experimentální mechanika. VUT FSI 2003 (www.fme.vutbr.cz/opory)

Classification of course in study plans

  • Programme N3901-2 Master's

    branch M-IMB , 1 year of study, winter semester, compulsory
    branch M-MET , 1 year of study, winter semester, compulsory

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

Ing. Petr Krejčí, Ph.D.

Syllabus

1. Introduction into methodology of experimental work. Measuring chain.
2. Passive sensors of mechanical quantities.
3. Active sensors of mechanical quantities.
4. Continuous and discrete signals – methodology of their processing.
5. Digital signal filtering.
6. Devices for measurement of mechanical quantities.
7. Measurement of kinematic quantities.
8. Methods for determination of stresses and deformations of bodies.
9. Properties of resistance strain gages.
10. Criteria for optimal selection of strain gages.
11. Optical methods (photoelasticity, moiré, holography, specle.)
12. Brittle lacquers. Methods for measurement of residual stresses. Cracks detection.
13. Measurement of forces, torques and pressures.