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undergraduate thesis
Utjecaj orijentacije goda na tvrdoću drva obične smreke
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. urn:nbn:hr:235:937651
Gagulić, Antonio
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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Gagulić, A. (2021). Utjecaj orijentacije goda na tvrdoću 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:235:937651

Gagulić, Antonio. "Utjecaj orijentacije goda na tvrdoću drva obične smreke." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:937651

Gagulić, Antonio. "Utjecaj orijentacije goda na tvrdoću drva obične smreke." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:937651

Gagulić, A. (2021). 'Utjecaj orijentacije goda na tvrdoću drva obične smreke', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 22 June 2024, https://urn.nsk.hr/urn:nbn:hr:235:937651

Gagulić A. Utjecaj orijentacije goda na tvrdoću drva obične smreke [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2021 [cited 2024 June 22] Available at: https://urn.nsk.hr/urn:nbn:hr:235:937651

A. Gagulić, "Utjecaj orijentacije goda na tvrdoću 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:235:937651

Metadata
TitleUtjecaj orijentacije goda na tvrdoću drva obične smreke
Title (english)Annual ring orientation effect on hardness of European spruce
AuthorAntonio Gagulić
MentorVera Rede (mentor)
Committee memberBranko Bauer (predsjednik povjerenstva)
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
Osnovni zadatak ovog rada bio je istražiti kako promjena presjeka od radijalnog (LR) do tangencijalnog (LT) utječe na tvrdoću drva obične smreke (Picea abies) u longitudinalnom smjeru (L). U teorijskom dijelu rada navedene su osnovne karakteristike građe te mehanička i fizikalna svojstva drva s osobitim naglaskom na ispitivanje tvrdoće Brinellovom metodom. U eksperimentalnom dijelu rada utvrđeno je da se tvrdoća drva u longitudinalnom smjeru smanjuje s promjenom presjeka od radijalnog prema tangencijalnom. Najveća srednja vrijednost tvrdoće u iznosu od 59 HB izmjerena je u radijalnom presjeku, a najmanja vrijednost tvrdoće u iznosu od 38 HB izmjerena je u tangencijalnom presjeku. Ukupno smanjenje tvrdoće iznosi oko 36 %. Rasipanje rezultata pri mjerenju tvrdoće bilo je relativno veliko, ali je koeficijent varijacije manji od 7 % što je dosta manje od dopuštenog (20 %).
Abstract (english)
The main task of this paper was to examine how the change of section from radial (LR) to tangential (LT) affects the hardness of spruce wood (Picea abies) in the longitudinal direction (L). The theoretical part of the paper gives the basic characteristics of structure as well as mechanical and physical properties of wood with emphasis on the Brinell hardness test. In the experimental part of the paper, it was determined that the hardness of wood in the longitudinal direction decreases with the change of section from radial to tangential. The highest mean hardness value of 59 HB was measured in radial section and the lowest mean hardness value of 38 HB was measured in tangential section. Total reduction of hardness is about 36%. The scattering of the hardness measurement was relatively large, but the coefficient of variation was less than 7% which is much less than allowed (20%).
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:937651
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
Terms of useLicence In copyright icon
Created on2021-02-18 13:40:04