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undergraduate thesis
Utjecaj orijentacije goda na abrazijsku otpornost drva obične smreke
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. urn:nbn:hr:235:726481
Raič, Andro
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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Raič, A. (2021). Utjecaj orijentacije goda na abrazijsku otpornost drva obične smreke (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:726481

Raič, Andro. "Utjecaj orijentacije goda na abrazijsku otpornost drva obične smreke." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:726481

Raič, Andro. "Utjecaj orijentacije goda na abrazijsku otpornost drva obične smreke." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:726481

Raič, A. (2021). 'Utjecaj orijentacije goda na abrazijsku otpornost drva obične smreke', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 17 June 2024, https://urn.nsk.hr/urn:nbn:hr:235:726481

Raič A. Utjecaj orijentacije goda na abrazijsku otpornost drva obične smreke [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2021 [cited 2024 June 17] Available at: https://urn.nsk.hr/urn:nbn:hr:235:726481

A. Raič, "Utjecaj orijentacije goda na abrazijsku otpornost drva obične smreke", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:235:726481

Metadata
TitleUtjecaj orijentacije goda na abrazijsku otpornost drva obične smreke
Title (english)Annual ring orientation effect on abrasion resistance of European spruce
AuthorAndro Raič
MentorVera Rede (mentor)
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
Cilj ovog rada bio je odrediti otpornost na abrazijsko trošenje drva domaće smreke (Picea abies) u longitudinalnom smjeru, od tangencijalnog (LT) do radijalnog presjeka (LR). Ispitivanje otpornosti na abraziju provedeno je standardnom metodom „suhi pijesak – gumeni kotač“. S obzirom na relativno ujednačenu gustoću abradiranih uzoraka, otpornost na trošenje izražena je preko gubitka mase. Srednja vrijednost gustoće uzoraka drva smreke iznosila je 0,433 g/cm3. Utvrđeno je da otpornost na abraziju ovisi o orijentaciji abradirane površine. Iako je rasipanje rezultata vrlo veliko izražen je trend smanjenja abrazijskog trošenja s povećanjem kuta kojeg zatvara trošena površina s tangencijalnim presjekom, od 0° do 90°. Najmanju otpornost na abrazijsko trošenje ima tangencijalni presjek, a najveću radijalni. Srednji gubitak mase u radijalnom presjeku je za 48 % manji u odnosu na tangencijalni, a na abradiranoj površini zakrenutoj za 45°, srednji gubitak mase manji je za oko 9 %.
Abstract (english)
The aim of this study was to determine the abrasion resistance of domestic spruce wood (Picea abies) in the longitudinal direction, from tangential (LT) to radial cross section (LR). The abrasion resistance test was performed by the standard method "dry sand – rubber wheel". Given the relatively uniform density of the abraded samples, the wear resistance is expressed through weight loss. The mean density of spruce wood samples was 0.433 g/cm3. It was found that the abrasion resistance depends on the orientation of the abraded surface. Although the scattering of the results is very large, there is a pronounced trend of decreasing abrasion wear with increasing angle closed by the worn surface with a tangential cross section, from 0° to 90°. The tangential cross section has the lowest abrasion resistance and the radial cross-section the highest. The mean weight loss in radial cross section is 48% lower compared to the tangential, and on the abraded surface rotated by 45°, the mean weight loss is reduced by about 9%.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:726481
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 on2021-02-23 22:41:57