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master's thesis
Razvoj analitičke i numeričke metode za statističku procjenu spektralnog zamora
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:235:175104
Ciganović, Igor
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Ciganović, I. (2023). Razvoj analitičke i numeričke metode za statističku procjenu spektralnog zamora (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:175104

Ciganović, Igor. "Razvoj analitičke i numeričke metode za statističku procjenu spektralnog zamora." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:175104

Ciganović, Igor. "Razvoj analitičke i numeričke metode za statističku procjenu spektralnog zamora." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:175104

Ciganović, I. (2023). 'Razvoj analitičke i numeričke metode za statističku procjenu spektralnog zamora', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:175104

Ciganović I. Razvoj analitičke i numeričke metode za statističku procjenu spektralnog zamora [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2023 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:235:175104

I. Ciganović, "Razvoj analitičke i numeričke metode za statističku procjenu spektralnog zamora", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:235:175104

Metadata
TitleRazvoj analitičke i numeričke metode za statističku procjenu spektralnog zamora
Title (english)Development of analytical and numerical methods for statistical assessment of spectral fatigue
AuthorIgor Ciganović
MentorZvonimir Tomičević (mentor)
MentorDamjan Čakmak (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2023-05-11, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U okviru ovog rada razvijena je analitička i numerička metoda za statističku procjenu spektralnog zamora. Proračuni u vremenskoj domeni računalno su zahtijevniji od proračuna u frekvencijskoj domeni, stoga su razvijene metode koja su temeljene na proračunima u frekvencijskoj domeni. U prvom dijelu rada opisana je pojava zamornog loma, propagacija pukotine u materijalu, Wöhlerova krivulja i S-N metoda proračuna zamora materijala. U drugom dijelu rada dan je opis načina brojanja ciklusa nepravilnih amplituda korištenjem Rainflow metode za ponavljajuću povijest naprezanja. Nadalje, opisani su matematički izrazi potrebni za procjenu visokocikličkog zamora u frekvencijskoj domeni. Dan je opis Dirlikove približne spektralne teorije. Pored toga dan je matematički opis modalne analize, budući da je ista korištena u razvijenim metodama. U zadnjem dijelu uspoređeni su rezultati analitičke metode dobivenih u programskom paketu MATLab i rezultati numeričke metode dobivenih u kombinaciji programskih paketa Abaqus i FE-Safe.
Abstract (english)
Within this study, an analytical and numerical method for statistical estimation of spectral fatigue has been developed. Since time-domain calculations are computationally demanding, the methodology presented encompasses frequency-domain calculations for efficient resource utilization. The first part of the thesis describes the phenomenon of fatigue failure, crack propagation in materials, the Wöhler curve, and the S-N method for fatigue calculations. The second part of the thesis provides a description of the method for counting cycles of irregular amplitudes using the Rainflow method for repeating stress history. Furthermore, mathematical expressions necessary for the estimation of high-cycle fatigue in the frequency domain are described. A description of Dirlik's approximate spectral theory is given. n addition, a general description of modal analysis is provided, as it has been used in the developed methods. n the last part, a comparison of the results obtained from the analytical method using the MATLAB software package and the results obtained from the numerical method using a combination of the Abaqus and FE-Safe software packages was performed.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:175104
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2023-05-08 17:00:50