636-0822/01 – Prediction of Properties and Reliability of Materials (PVaS)

Gurantor departmentDepartment of Material EngineeringCredits5
Subject guarantorprof. Ing. Bohumír Strnadel, DrSc.Subject version guarantorprof. Ing. Bohumír Strnadel, DrSc.
Study levelundergraduate or graduateRequirementCompulsory
Year2Semestersummer
Study languageCzech
Year of introduction2004/2005Year of cancellation
Intended for the facultiesFMTIntended for study typesFollow-up Master
Instruction secured by
LoginNameTuitorTeacher giving lectures
FER03 Ing. Petr Ferfecki, Ph.D.
STR50 prof. Ing. Bohumír Strnadel, DrSc.
Extent of instruction for forms of study
Form of studyWay of compl.Extent
Full-time Credit and Examination 3+2
Combined Credit and Examination 20+0

Subject aims expressed by acquired skills and competences

- Specify the relationship between the structural parameters and mechanical properties of material - Determine the effect of the scatter of structural parameters on the statistical characteristics of the material - Effects of statistical behavior of mechanical properties of the material on the formation of the limit state - Ability to determine the likelihood of reaching the limit state of material during fracture instability, given the micro structural character - Application of the probability solution of the estimated time of reaching the fracture instability, to the calculation of mechanical system reliability - Ability to establish the relationship between the likelihood of located and integral limit state of the material

Teaching methods

Lectures
Tutorials

Summary

The lecture presents relationships between microstruktural parameters and stress-strain and fracture behaviours of structural materials. It shows basic method how to calculate stress-strain field in the nearness of stress concentrations, especially ahead of sharp cracks under elastic and elastic- plastic loading. The significance to connect these methods with local approach is in the lecture emphasized. This enables to estimate reliability of materials and rest of service life of structural parts which are from these materials made. The lecture leads into evaluation methods of the influences of statistical distributions in microstructural parameters on the scatter of mechanical properties. This is a starting point for proposal of concepts in structural design of material with called relationship between strength behaviours and toughness.

Compulsory literature:

1. B. STRNADEL: Solved Problems and Technical Tasks of Material Engineering, Ostrava Printers 1998, 334 p., in Czech 2. J. NĚMEC, J. SEDLÁČEK: Statistical Basis of Structural Strength 1, Academia Praha 1982, 313 p., in Czech 3. J. NĚMEC, J. DREXLER, S. V. SERENSEN, V. P. KOGAJEV: Statistical Basis of Structural Strength 2, Academia Praha 1982, 381 p., in Czech 4. J. B. ŠOR: Statistical Methods of Analysis and the Quality Control and Reliability, SNTL Praha 1965, 453 p., in Czech 5. F. C. MOON: Chaotic and Fractal Dynamics An Introduction for Scientists and Engineers, John Wiley & Sons New York 1992, 508 p., ISBN 0-471-54571-6

Recommended literature:

1. J. KOUTSKÝ: Degradation Processes and Prediction of the Durability, ZČU Plzeň 1995, 166 p., ISBN 80-7082-177-9, in Czech 2. F. E. FISHER, J. R. FISHER: Probability Applications in Mechanical Design, Marcel Dekker AG New York 2000, 290 p., ISBN 0-8247-0260-3 3. D. N. P. MURTHY, M. XIE, R. JIANG: Weibull Models, John Wiley & Sons New Jersey 2004, 396 p., ISBN 0-471-36092-9 4. M. CENCINI, F. CECCONI, A. VULPIANI: Chaos From Simple Models to Complex Systems, World Scientific Publishing Singapure 2010, 460 p., ISBN-13 978-981-4277-65-5 5. S. MILÁČEK: Random and chaotic phenomenon in the mechanics, Publishing ČVUT Praha 2000, 141 p., ISBN 80-01-02170-X, in Czech

Way of continuous check of knowledge in the course of semester

E-learning

Další požadavky na studenta

Prerequisities

Subject has no prerequisities.

Co-requisities

Subject has no co-requisities.

Subject syllabus:

The lectures: 1. Introduction the lecture. 2. Fundamental relationships between strength characteristics and toughness of structural materials and their microstructure. 3. Formulation of variance effect of microstructural parameters on the stress strain behavior of structural materials. 4. Statistical interpretation of the degradation process and its utilization in estimating the reliability of structural parts. 5. Methods of prediction of the degradation processes of construction materials. 6. Methods for calculating the characteristics of localized limit states and their distribution. 7. Methods of increasing the fracture toughness of structural materials. 8. Stochastic and deterministic prediction of fatigue strength under steady and unsteady loads. 9. General characteristics and consequences of probabilistic and chaotic phenomena on prediction of break of construction materials. 10. Introduction to fractal geometry of the selfsimilar and selfaffine shapes and their quantification. 11. New methods using for evaluation of materials and surfaces of fractal geometry. 12. Assessment of reliability and safety of construction materials when exposed to degradation processes. 13. Methods to minimize the risk of limit state and their application in the design parameters optimized microstructure. 14. Using the prediction characteristics and reliability of materials in engineering practice. Exercises: 1. Introduction exercises for credit terms, a summary of the literature study, a summary of the basic knowledge of degradation processes of construction materials, metal physics and mathematical statistics required to manage the course. 2. Discussion of the basic relations between the microstructural characteristics of structural materials and their mechanical properties, consequences on the reliability of structural parts. 3. Methods of statistical files of mechanical characteristics of structural materials and the interpretation of character of distribution functions in relation to production technology and processing. 4. General statistical methods for evaluation of processes and their applications to stable crack growth, the creation of fracture instability and the mechanisms of fatigue damage. 5. Examples for the calculation of the statistical distribution of local strength and microstructural characteristics of fracture. 6. Development of algorithms and generating of the selfsimilar and selfaffine fractal shapes and calculation of their statistical characteristics. 7. Practical application of quantifiers to distinguish between probability and chaotic phenomena. 8. Calculation of fractal dimension of surfaces with several surface processing and fracture surfaces. 9. Examples of determination of some statistical characteristics of the microstructure of engineering materials, the application of statistical methods of evaluation character fracture surfaces. 10. Prediction of the development process fracture of structural materials and discussion of order to apply these methods in the engineering practice. 11. Examples of technical computing time dependency reliability of structural parts subjected to effects of degradation processes and the optimization of durability. 12. Solved examples of application of the prediction of material characteristics and reliability in engineering practice. 13. Credit test. 14. Check of the test result, credit.

Conditions for subject completion

Combined form (validity from: 2009/2010 Winter semester, validity until: 2011/2012 Summer semester)
Task nameType of taskMax. number of points
(act. for subtasks)
Min. number of points
Exercises evaluation and Examination Credit and Examination 100 (100) 51
        Exercises evaluation Credit 30  15
        Examination Examination 70  0
Mandatory attendence parzicipation:

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Occurrence in study plans

Academic yearProgrammeField of studySpec.FormStudy language Tut. centreYearWSType of duty
2015/2016 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2015/2016 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2014/2015 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2014/2015 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2013/2014 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2013/2014 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2012/2013 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2012/2013 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2011/2012 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2011/2012 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2010/2011 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2010/2011 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2009/2010 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2009/2010 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2008/2009 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2008/2009 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2007/2008 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2007/2008 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2006/2007 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2006/2007 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan
2005/2006 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials K Czech Ostrava 2 Compulsory study plan
2005/2006 (N3923) Materials Engineering (3911T031) Diagnostics and Design of Materials P Czech Ostrava 2 Compulsory study plan

Occurrence in special blocks

Block nameAcademic yearForm of studyStudy language YearWSType of blockBlock owner