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undergraduate thesis
Promjene abrazijske otpornosti drva bagrema na poprečnom presjeku debla
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:235:978582
Sladić, Jakov
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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Sladić, J. (2023). Promjene abrazijske otpornosti drva bagrema na poprečnom presjeku debla (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:978582

Sladić, Jakov. "Promjene abrazijske otpornosti drva bagrema na poprečnom presjeku debla." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:978582

Sladić, Jakov. "Promjene abrazijske otpornosti drva bagrema na poprečnom presjeku debla." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:978582

Sladić, J. (2023). 'Promjene abrazijske otpornosti drva bagrema na poprečnom presjeku debla', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:978582

Sladić J. Promjene abrazijske otpornosti drva bagrema na poprečnom presjeku debla [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2023 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:235:978582

J. Sladić, "Promjene abrazijske otpornosti drva bagrema na poprečnom presjeku debla", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:235:978582

Metadata
TitlePromjene abrazijske otpornosti drva bagrema na poprečnom presjeku debla
Title (english)Variability of black locust abrasion resistance in cross section of the steam
AuthorJakov Sladić
MentorVera Rede (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2023-03-02, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Glavni cilj ovog rada je bio odrediti kako udaljenost od srčike utječe na tvrdoću i abrazijsku otpornost drva bagrema (Robinia pseudoacacia) na poprečnom presjeku. Tvrdoća je izmjerena Brinellovom metodom, a ispitivanje otpornosti na abrazijsko trošenje provedeno je na uređaju Taber abrader. Rezultati istraživanja pokazali su da udio kasnog dijela goda ima veliki utjecaj na intezitet abrazijskog trošenja. Između udjela kasnog dijela goda i inteziteta trošenja postoji jaka negativna linearna korelacija uz visoki koeficijent R = -0,717. Vrijednosti izmjerenih udjela kasnog dijela goda na ispitnim uzorcima kreću se u rasponu od 0,415 do 0,868. Otpornost na abrazijsko trošenje drva bagrema ne ovisi o poziciji uzoraka u odnosu na srčiku. Izmjerene vrijednosti tvrdoće nalaze se u rasponu od 124,9 HB do 187,3 HB. Kod mjerenja tvrdoće na poprečnom presjeku drva prisutno je veliko rasipanje rezultata, koje je karakteristčno za sve drvne vrste.
Abstract (english)
The main goal of this thesis was to determine how the distance from the pith affects the hardness and abrasion resistance of black lotus wood (Robinia pseudoacacia) in cross section. The hardness was measured with the Brinell method, while the abrasion resistance test was performed on a Taber abrader device. The results of the research showed that the proportion of the late part of the annual ring has a great influence on the intensity of abrasive wear. Between the proportion of the late part of the annual ring and the intensity of wear, there is a strong negative linear correlation with a high coefficient R = -0.717. The values of the measured proportion of the late part of the annual ring on the test samples range from 0.415 to 0.868. The resistance to abrasion wear of black lotus wood does not depend on the position of samples in relation to the pith. The measured hardness values are in the range from 124.9 HB to 187.3 HB. When measuring hardness in a cross section of wood there is a large dispersion of results, which is characteristic of all wood species.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:978582
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 on2023-02-27 16:03:42