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undergraduate thesis
Utjecaj usmjerenosti strukture na savojni modul elastičnosti drva jele u longitudinalnom smjeru
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. urn:nbn:hr:235:442308
Mrvelj, Nikola
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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Mrvelj, N. (2022). Utjecaj usmjerenosti strukture na savojni modul elastičnosti drva jele u longitudinalnom smjeru (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:442308

Mrvelj, Nikola. "Utjecaj usmjerenosti strukture na savojni modul elastičnosti drva jele u longitudinalnom smjeru." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:442308

Mrvelj, Nikola. "Utjecaj usmjerenosti strukture na savojni modul elastičnosti drva jele u longitudinalnom smjeru." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:442308

Mrvelj, N. (2022). 'Utjecaj usmjerenosti strukture na savojni modul elastičnosti drva jele u longitudinalnom smjeru', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:442308

Mrvelj N. Utjecaj usmjerenosti strukture na savojni modul elastičnosti drva jele u longitudinalnom smjeru [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2022 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:235:442308

N. Mrvelj, "Utjecaj usmjerenosti strukture na savojni modul elastičnosti drva jele u longitudinalnom smjeru", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:235:442308

Metadata
TitleUtjecaj usmjerenosti strukture na savojni modul elastičnosti drva jele u longitudinalnom smjeru
Title (english)Effect of structural orientation on the bending modulus of elasticity in the longitudinal direction of fir wood
AuthorNikola Mrvelj
MentorVera Rede (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2022-03-02, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Cilj ovog rada je odrediti kako usmjerenost strukture drva jele (Abies alba) utječe na savojni modul elastičnosti u longitudinalnom smjeru. Ispitivanje savojnog modula elastičnosti provedeno je metodom savijanja u tri točke. Savojna sila bila je okomita na longitudinalni smjer, a u odnosu na tangentu goda djelovala je pod kutom od 0°, 45° i 90°. Za svaki kut ispitano je po 30 uzoraka. Utvrđeno je da savojni modul elastičnosti u longitudinalnom smjeru ovisi o kutu između savojne sile i tangente na god. Najveća srednja vrijednost savojnog modula od 6619,5 N/mm2 dobivena je kod kuta od 0°, a najmanja od 6067,2 N/mm2 pod kutom od 90°. Vrijednost savojnog modula elastičnosti kod kuta od 45° iznosila je 6113,4 N/mm2. Rasipanja rezultata pri ispitivanju savojnog modula elastičnosti bila su relativno velika, ali je koeficijent varijacije bio ispod dopuštene vrijednosti od 20 %. Pokazalo se da vrijednosti modula elastičnosti svih triju skupina slijede Weibullovu distribuciju.
Abstract (english)
The goal of this study was to determine how the orientation of the fir wood structure affects the flexural modulus of elasticity in the longitudinal direction. The flexural modulus of elasticity was tested by the three-point bending method. The flexural force was perpendicular to the longitudinal direction, and in relation to the tangent of the tree rings it acted at an angle of 0°, 45°, and 90°. For each angle were tested 30 samples. It was found that the flexural modulus of elasticity in the longitudinal direction depends on the angle between the flexural force and the tangent per tree ring. The highest mean value of the flexural modulus of 6619.5 N/mm2 was obtained at an angle of 0°, and the lowest of 6067.2 N/mm2 at an angle of 90°. The value of the flexural modulus of elasticity at an angle of 45° was 6113.4 N/mm2. The dispersion of the results in the flexural modulus of elasticity test was relatively large, but the coefficient of variation was below the permissible value of 20%. The values of the modulus of elasticity of all three groups were shown to follow the Weibull distribution.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:442308
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 on2022-02-27 22:07:18