653-0924/01 – Degradation processes of structural materials (DPKM)
| Gurantor department | Department of Materials Engineering and Recycling | Credits | 10 |
| Subject guarantor | prof. Ing. Bohumír Strnadel, DrSc. | Subject version guarantor | prof. Ing. Bohumír Strnadel, DrSc. |
| Study level | postgraduate | Requirement | Choice-compulsory |
| Year | | Semester | winter + summer |
| | Study language | Czech |
| Year of introduction | 2023/2024 | Year of cancellation | 2024/2025 |
| Intended for the faculties | FMT | Intended for study types | Doctoral |
Subject aims expressed by acquired skills and competences
Identify degradation processes and their causes
Specify the basic laws that control degradation processes
Design a suitable material with high resistance against the effects of the degradation process
Calculate the service life of a structural part subjected to the action of a specific degradation process
Determine the critical defect size for selected types of materials and methods of stressing
Determine the limiting characteristics of the stress of the material under the given conditions
Teaching methods
Lectures
Individual consultations
Summary
The lecture introduces aspirants to the methods of evaluating the degradation processes of structural materials. Attention is mainly devoted to the analysis of the microstructural conditions of the initiation of brittle and ductile fracture, fatigue failure, creep, corrosion damage, corrosion cracking and basic wear mechanisms of functional surfaces. This analysis is followed by an explanation of the effect of temperature, method of loading and parameters of the surrounding environment on the emergence of a limit state completed by fracture and loss of the basic function of the material to transmit voltage
deformation field. The evaluation methods of these degradation processes are applied both to metals and to ceramic materials, polymers and basic types of composites. In the lecture, special attention is paid to clarifying the influence of the size and shape of the structural part on the emergence of the limit state and the methods of evaluating the resistance of structural parts under the influence of the negative effects of degradation processes. The logical conclusion of the lecture is the presentation of methods for rational estimation of the degree of construction safety both at the stage of its design and also during operational decision-making in operational practice.
Compulsory literature:
Recommended literature:
LALANNE, C. Fatigue Damage, Wiley, Hoboken, NJ, USA 1999.
HULL, D. Fractography, Cambridge University Press, Cambridge UK 1999.
Way of continuous check of knowledge in the course of semester
Continuous verification of study results:
full-time form of study - 1 project;
combined form of study - 1 project.
Final verification of study results: written exam.
E-learning
LMS Moodle
Other requirements
There are no further requirements.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
1. Introduction – basic relationships between structure and mechanical characteristics
2. Changes in material properties caused by degradation processes
3. Basic groups of construction materials and their degradation processes
4. Fracture from overload under uniaxial and multiaxial tension
5. Conditions for the formation of a low-energy brittle fracture
6. Conditions for the formation of a high-energy ductile fracture
7. Mechanisms of initiation and propagation of fatigue failure
8. Fatigue damage to structural parts under the action of multiaxial tension
9. Mechanisms of initiation of creep damage
10. Creep fracture and factors affecting it
11. Mechanisms of corrosion cracking and hydrogen embrittlement
12. Basic wear mechanisms of functional surfaces
13. Combined effects of some degradation processes
14. Consequences of degradation processes in the reliability of structural parts
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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