Utjecaj širine goda i gustoće na čvrstoću na tlak drva divlje trešnje (Prunus avium L.)

master's thesis

• Title (english): Influence of ring width and density on compression stress of European cherry (Prunus avium L.)
• Author: Tomislav Jaić
• Mentor: Tomislav Sinković (mentor)
• Committee member: Tomislav Sinković
• Committee member: Bogoslav Šefc
• Committee member: Tomislav Sedlar
• Granter: University of Zagreb; Faculty of Forestry and Wood Technology; (Institute for Wood Science); Zagreb
• Defense date and country: 2013-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Wood Technology; Wood Materials

Abstract

Diplomski rad sadrţi rezultate istraţivanja makroskopskih karakteristika, gustoće drva u prosušenom stanju i ĉvrstoće na tlak paralelno sa vlakancima drva divlje trešnje (Prunus avium L.) s podruĉja Slavonije. U sklopu istraţivanja uĉinjena su mjerenja i izraĉuni; širina goda, finoća godova (god/cm), masa, volumen, gustoća drva u prosušenom stanju, sadrţaj vode, ĉvrstoća na tlak paralelno sa vlakancima, utjecaj zone srţi i bijeli kao i strane svijeta (sjeverozapad, sjeveroistok, jugozapad,... More jugoistok) iz koje je uzorak izraĊen. Raznim laboratorijskim izmjerama, ali i proraĉunima dobivenim na temelju mjerenja i ispitivanja uzoraka (izraĊenim po HRN ISO normama) te sveukupnom analizom podataka s grafiĉkim prikazima donijeti su zakljuĉci. Ispitni uzorci trešnjevine su ispitivani u prosušenom stanju kod
prosjeĉnog sadrţaja vode od 9,57%. Ispitivani uzorak trešnjevine ima prosjeĉnu širinu goda 2,68 mm sa standardnom devijacijom 1,4334. Godovi su uski (fini) sa prosjekom od 4 goda po duţnom cm i standardnom devijacijom od 1,3749. Srednja vrijednost gustoće kod sadrţaja vode od 9,57% iznosi 0,540 ⁄ sa standardnom devijacijom 0,0262. Ĉvrstoća na tlak paralelno s vlakancima kod sadrţaja vode od 9,57% iznosi od minimalnih 35 MPa do maksimalnih 61 MPa. Srednja vrijednost ĉvrstoće na tlak iznosi 48 MPa sa standardnom devijacijom od 5,9784. Ĉvrstoća na tlak paralelno s vlakancima kod sadrţaja vode od 12% kreće se izmeĊu 30…41…54 MPa sa standardnom devijacijom 5,1031. Less

Abstract (english)

This thesis contains the results of macroscopic properties, wood density and compression stress parallel to grain of wild cherry wood (Prunus avium L.) from the Slavonija. As part of the research we have measurements and calculations; ring width, finesse grain (ring/cm), mass, volume, wood density, water content, compression stress parallel to the grain, the impact of heartwood and sapwood, as well as the orientation (northwest, northeast, southwest, southeast), from which the sample was... More made. Various laboratory measurements, and calculations obtained on the basis of measurement and testing samples (made by HRN ISO standards), and the overall data analysis with graphics display, brings of the conclusions. Test specimens were examined in dry state with water content of 9,57%. The tested sample of cherry wood has an average ring width 2,68 mm with a standard deviation of 1,4334. Growth rings are narrow (fine) with an average of 4 rings per linear cm and a standard deviation of 1,3749. The mean value of density at water content of 9,57% is 0,540 ⁄ with a standard deviation of 0,0262. Compression stress parallel to the grain at water content of 9,57% range from minimum 35 MPa, to maximum 61 MPa. Mean value of compression stress parallel to the grain is 48 MPa with a standard deviation 5,9784. Compression stress parallel to the grain at water content of 12 % range 30…41…54 MPa with a standard deviation
5,1 Less

• Keywords: Divlja trešnja (Prunus avium L.); ĉvrstoća na tlak paralelno sa vlakancima; gustoća; širina goda; srţ i bijeljika
• Keywords (english): Divlja trešnja (Prunus avium L.); ĉvrstoća na tlak paralelno sa vlakancima; gustoća; širina goda; srţ i bijeljika
• Language: croatian
• URN:NBN: urn:nbn:hr:108:112289
• Study programme: Title: Design of Wood Products; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka drvne tehnologije (magistar/magistra inženjer/inženjerka drvne tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2016-01-18 13:35:08