Experimental Mechanics

Garant předmětu:

Ondřej Kovářík

Lecturer:

Ondřej Kovářík

Tutor:

Ondřej Kovářík

Supervisor:

Department of Materials

Synopsis:

Abstract:

The course represents an overview of current experimental methods and procedures in the following fields:

- experimental analysis of the main mechanical quantities (stress, displacement, force, torque, pressure, etc.),

- experimental dynamics (shakers, vibration transducers, damping, balancing, vibroanalysis).

Every four hours lecture is equivalently divided into theoretical and experimental. The presented methods are immediately demonstrated in the laboratory in groups of maximally three students organized as research teams. Each team ha a tutor at hand to guide the students through the experimental task and to solve an eventual problems. One student is designated a team leader and is responsible for the proper fulfilment of the experimental task and prepares a experimental report at home and hands it back in one month time.

Requirements:

Syllabus of lectures:

Outline:

1.Experimental mechanics and stress analysis. a) Measurement and transducers of displacement, strain, distortion, force, torque, pressure. b) Resistance strain gauges, photoelasticity, brittle coatings, holointerferometry, moiré techniques, thermoelasticity, digital image correlation.

2. Experimental dynamics. a) Basic vibration theory, shakers, transducers for acceleration, velocity and dynamic displacement measurement, stroboscope. b) A/D conversion, digital data recording and processing , statistical and FFT vibration analysis, damping, balancing, multi-parametric vibrodiagnostics.

Keywords: Mechanical and dynamical sensors, Experimental Stress Analysis, Experimental Dynamics, digital image correlation.

Syllabus of tutorials:

Study Objective:

Study materials:

Key references:

[1] A. S. Kobayashi: Handbook on Experimental Mechanics. Society for Experimental Mechanics, Inc., Prentice-Hall, Inc., 1993, ISBN 0-13-377706-5 25.

[2] S. Timoshenko, Engineering Mechanics : In SI Units, McGraw Hill Education., 2017, ISBN 978-1259062667

Recommended references:

[3] R. J. Roark, W.C. Young, R.G. Budynas, A.M. Sadegh, Roark’s Formulas for Stress and Strain., McGraw-Hill, 2011, ISBN 978-0071742474.

Equipment:

1. Mechanical testing laboratory:

Tensile testing machine, calibration tools for displacement and force transducers, dial gauges, strain gauge amplifiers and another measuring instruments, digital image correlation macrocamera.

2. Laboratory of Experimental Mechanics:

Electrodynamics shakers, displacement gauges for, velocity and acceleration transducers, oscilloscope, stroboscope, laser displacement sensor, table balancing machine, computers LabJack data acquisition cards and Matlab system for measured data processing.

Note:

Time-table for winter semester 2023/2024:

Time-table is not available yet

Time-table for summer semester 2023/2024:

Time-table is not available yet

The course is a part of the following study plans:

• Fyzikální inženýrství materiálů (compulsory course in the program)