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undergraduate thesis
Razvoj algoritma za procjenu visokocikličkog zamora metodom toka kiše
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. urn:nbn:hr:235:799146
Kutleša, Eugen
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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Kutleša, E. (2021). Razvoj algoritma za procjenu visokocikličkog zamora metodom toka kiše (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:799146

Kutleša, Eugen. "Razvoj algoritma za procjenu visokocikličkog zamora metodom toka kiše." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:799146

Kutleša, Eugen. "Razvoj algoritma za procjenu visokocikličkog zamora metodom toka kiše." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:799146

Kutleša, E. (2021). 'Razvoj algoritma za procjenu visokocikličkog zamora metodom toka kiše', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 21 January 2025, https://urn.nsk.hr/urn:nbn:hr:235:799146

Kutleša E. Razvoj algoritma za procjenu visokocikličkog zamora metodom toka kiše [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2021 [cited 2025 January 21] Available at: https://urn.nsk.hr/urn:nbn:hr:235:799146

E. Kutleša, "Razvoj algoritma za procjenu visokocikličkog zamora metodom toka kiše", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:235:799146

Metadata
TitleRazvoj algoritma za procjenu visokocikličkog zamora metodom toka kiše
Title (english)Development of the algorithm for the high-cycle fatigue assessment via rainflow method
AuthorEugen Kutleša
MentorZvonimir Tomičević (mentor)
MentorDamjan Čakmak (komentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2021-02-25, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
General Mechanical Engineering (Construction)
Abstract
Ovaj rad bavi se temom analize zamora materijala. Fokus rada je usmjeren na tzv. Rainflow metodu brojanja ciklusa (metoda „toka kiše“). Rainflow metoda jedna je od metoda kojima se pojednostavljuju složene povijesti naprezanja promjenjivih amplituda u niz jednostavnih ciklusa naprezanja konstantnih amplituda. Pojednostavljena povijest naprezanja omogućuje proračun zamora. U radu se razmatraju i uspoređuju četiri varijante Rainflow metode temeljene na različitom brojanju polu-ciklusa. Na početku rada opisan je fenomen zamornog loma, njegov uzrok u kristalnoj rešetci materijala, Wöhlerova krivulja te S-N metoda proračuna zamora. U sljedećem dijelu nabrojene su i opisane metode brojanja ciklusa navedene u ASTM normi E1049-85 (2011). Nadalje, uzet je ogledni primjer povijesti naprezanja iz norme te je na njemu detaljno opisan cjelokupan proračun zamora koristeći S-N metodu proračuna. U zadnjem dijelu rada prikazani su i diskutirani rezultati analize zamora jednog stohastičkog signala povijesti naprezanja. Analiza je provedena pomoću algoritma napisanim u alatu MATLAB R2018b.
Abstract (english)
This thesis deals with the topic of fatigue analysis. The focus of the thesis is on the so-called Rainflow cycle counting method. The Rainflow method is one of the methods that simplifies complex stress/load histories of variable amplitudes into a series of simple, constant amplitude stress cycles. Simple, constant amplitude stress/load history makes the fatigue calculation possible. This thesis discusses and compares four variants of the Rainflow counting method based on different half-cycle (residual) counting. At the beginning of the thesis, the fatigue failure phenomenon, its cause in the crystal lattice of the material, the Wöhler curve and the S-N method of fatigue calculation are described. The following section lists and describes the cycle counting methods listed in the ASTM standard E1049-85 (2011). Furthermore, a stress/load history benchmark example was taken from the ASTM standard and the entire fatigue calculation was described in detail using the S-N calculation method. In the last section, the results of the fatigue analysis of a "Gaussian" stress/load history are presented and discussed. The analysis is performed by an algorithm created in MATLAB R2018b.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:799146
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2021-02-19 11:58:28