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undergraduate thesis
Analiza propagacije višestrukih zamornih pukotina u tankim pločama
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. urn:nbn:hr:235:765917
Jakupčić, Vlatko
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

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Jakupčić, V. (2020). Analiza propagacije višestrukih zamornih pukotina u tankim pločama (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:765917

Jakupčić, Vlatko. "Analiza propagacije višestrukih zamornih pukotina u tankim pločama." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:765917

Jakupčić, Vlatko. "Analiza propagacije višestrukih zamornih pukotina u tankim pločama." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:765917

Jakupčić, V. (2020). 'Analiza propagacije višestrukih zamornih pukotina u tankim pločama', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 19 April 2024, https://urn.nsk.hr/urn:nbn:hr:235:765917

Jakupčić V. Analiza propagacije višestrukih zamornih pukotina u tankim pločama [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2020 [cited 2024 April 19] Available at: https://urn.nsk.hr/urn:nbn:hr:235:765917

V. Jakupčić, "Analiza propagacije višestrukih zamornih pukotina u tankim pločama", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:235:765917

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Metadata
TitleAnaliza propagacije višestrukih zamornih pukotina u tankim pločama
Title (english)Analysis of multiple site fatigue cracks propagation in thin plates
AuthorVlatko Jakupčić
MentorŽeljko Božić (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2020-09-23, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Aviation, Rocket and Space Technology
Aviation Technology and Maintenance
Abstract
U ovom radu su izložene neke od metoda analize propagacije zamornih pukotina pri cikličkom opterećenju, temeljene na mehanici loma i poznatim eksponencijalnim zakonima napredovanja zamornih pukotina. Za uzorak ploče sa središnjom pukotinom dani su eksperimentalni rezultati rasta zamornih pukotina preuzeti iz literature. Primjenjujući Parisovu jednadžbu temeljenu na linearno elastičnoj mehanici loma, simuliran je rast zamorne pukotine za promatrani uzorak. Primjenom metode konačnih elemenata izračunati su koeficijenti intenzivnosti naprezanja, gdje je za područje oko vrha pukotine postavljena mreža singularnih elemenata. Numeričkom integracijom Parisove jednadžbe pomoću programskog paketa MATLAB2020a simulira se životni vijek napredovanja zamorne pukotine kojeg potom uspoređujemo s danim eksperimentalnim rezultatima. Također su utvrđene veličine plastične zone vrha pukotine i izračunate vrijednosti koeficijenta intenzivnosti naprezanja u odnosu na duljine pukotina.
Abstract (english)
In this work some of the methods used for fatigue crack propagation analysis based on fracture mechanics and well known power laws are presented. By using the Paris equation, based on linear elastic fracture mechanics, fatigue crack growth was simulated for considered specimens. For the plate specimen with a central crack experimental results for fatigue life data, a-N, taken from literature are given. Finite element method was used to calculate stress intensity factors, where the crack tip region was meshed by singular elements. By numerical integration of the Paris equation by means of MATLAB2020a package fatigue crack propagation lifetime is simulated which is afterwards compared with given experimental results. In addition, crack tip plastic zone size was assessed and effective stress intensity factor values were calculated with respect to crack length.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:765917
Study programmeTitle: Aeronautical Studies
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka zrakoplovnog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka zrakoplovnog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2022-09-24
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
RepositoryRepository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb
Created on2020-09-25 00:02:36

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