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Lecturer(s)
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Bláha František, prof. RNDr. CSc.
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Course content
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Topics of lectures according to weeks: 1. Notes on the history of design rules for power equipment in terms of strength, durability and sealing. ASME BPVC, NTD ASI, KTA codes. General principles and requirements for strength calculations. 2. Nomenclature, classification of components. Design, service and test loads. Limit states and failure mechanisms. Plastic analysis, limit analysis, collapse loads. Plastic hinge. 3. Material resistance to sudden failure. Critical brittle temperature. Fatigue limit state - stress approach, strain approach, fracture mechanics approach. Shakedown. Ratcheting. 4. Creep failure limit state. Basic concepts. Larson-Miller parameter. Effect of structural discontinuities and cyclic loading. Bree diagram. 5. Allowable stress. Design of basic dimensions of selected components. 6. Flange connections. Failure mode, sealing, leakage classes. 7. Elastic stress analysis and stress categories. Control calculation for static strength. Discontinuity regions. Limits for groups of stress categories. 8. Notches. Shape factor, effective concentration factor. True and fictitious stress, Neuber's rule. Control calculation of strength under cyclic loading. 9. Threads of bolted connections. Other factors affecting cyclic fatigue of steels. 10. Control calculation of strength under seismic effects. 11. Protection against internal and external risks. The effect of flying debris. Aircraft crash. Terrorist attack. 12. Crash testing of packaging assemblies containing spent nuclear fuel or other radioactive material. 13. Miscellaneous. Selection of pressure-temperature shock scenarios and thermohydraulic calculations. Schematization of non-integrity and computational evaluation of their acceptability. Topics of exercises: 1. Repetition of expected professional knowledge and skills. Introduction to the subject. 2. Examples of plastic joints. Examples of plastic and limit analysis using ANSYS Mechanical. 3. Strength examples and fractures in steels. Fatigue damage. 4. Examples of creep strength assessment. 5. Examples of sizing of the cylindrical shell of a pressure vessel, its cover and bottom, throats, etc. 6. Practice calculation of forces in flange joint, design of flange leaf height, design of preload force for a particular gasket. 7. Examples for each group of stress categories. Differences between ASME BPVC and NTD ASI. 8. Examples of calculation of fictitious stresses for a given load block and fatigue damage. 9. Calculation of fatigue damage of bolt threads according to NTD ASI. 10. Examples of the application of FEA for the determination of equipment strength from seismic effects. 11. Examples of target penetrations by flying debris, model aircraft as soft missiles. FEM programs and impact loading. 12. Examples of computational modelling of crash tests and their evaluation. 13. Further examples and repetitions.
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Learning activities and teaching methods
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Lecture, Practicum
- Preparation for comprehensive test (10-40)
- 10 hours per semester
- Contact hours
- 39 hours per semester
- Preparation for an examination (30-60)
- 30 hours per semester
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| prerequisite |
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| Knowledge |
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| to use basic knowledge of infinitesimal calculus and linear algebra |
| to use basic knowledge from B.Sc. courses related to material science, mechanics, elasticity and strength |
| Skills |
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| to use the skills of a Bc. studies in the field of Mechanical Engineering, Technology and Materials |
| Competences |
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| N/A |
| Basic work with a personal computer. |
| learning outcomes |
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| Knowledge |
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| concerning strength dimensioning, especially in the field of nuclear power facilities |
| methods for determining service life and fatigue damage |
| Skills |
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| to design of basic dimensions of selected components, to apply stress categorization, calculate fatigue damage and perform simple control calculations |
| to recognize and formulate a problem related to the integrity and fatigue damage of power equipment from a design perspective |
| Competences |
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| N/A |
| to plan and organise his/her own learning and work activities, to critically approach sources of information in the field and use them in his/her studies |
| teaching methods |
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| Knowledge |
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| Lecture |
| Practicum |
| Skills |
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| Practicum |
| Competences |
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| Individual study |
| Discussion |
| Task-based study method |
| assessment methods |
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| Knowledge |
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| Combined exam |
| Skills |
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| Test |
| Competences |
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| Combined exam |
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Recommended literature
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Normativní technická dokumentace A.S.I. - Hodnocení pevnosti zařízení a potrubí jaderných elektráren typu VVER, Sekce III.
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Anderson T.L. Fracture Mechanics - Fundamentals and Applications. Fourth Edition, CRC Press, 2017. CRC Press, 2017.
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Annaratone D. Pressure Vessel Design. Springer 2007. Springer, 2007.
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bannantine J.A., Commer J.J., Handrock J.L. Fundamentals of Metal Fatigue Analysis. Pearson Education, 1989. Pearson Education, 1989.
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Farr J.R., Jawad M.H. Guidebook for the Design of ASME Section VIII Pressure Vessels. Third Edition, ASME Press 2006. ASME Press, 2006.
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Jawad M.H., Jetter R.I. Design and Analysis of ASME Boiler and Pressure Vessel Components in the Creep range. ASME Press 2009. ASME Press, 2009.
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Jawad M,H. Structural Analysis and Design of Process Equipment. John Wiley & Sons 1984. John Wiley & Sons, 1984.
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Pilkey W., Pilkey D. Peterson's Stress Concentration factors. Third Edition, John Wiley & Sons 2008. John Wiley & Sons, 2008.
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