izpis_h1_title_alt

Analiza loma lesnih plošč pri obremenitvi na upogib : diplomski projekt
Centa, Uroš (Author), Medved, Sergej (Mentor) More about this mentor... This link opens in a new window, Vratuša, Srečko (Reviewer)

.pdfPDF - Presentation file, Download (1,27 MB)

Abstract
Preučevali smo, kako struktura plošče vpliva na lom pri maksimalni obremenitvi na upogib. Uporabili smo ploščne kompozite, ki so dostopni na trgu, in sicer furnirno ploščo, OSB ploščo, konstrukcijsko ploščo, iverno ploščo in vlakneno ploščo. Pri zadnjih 3 naštetih nas je zanimalo, kakšen je izgled loma posameznega sloja, ter kako mehanske lastnosti posameznega sloja vplivajo na celo ploščo. Pri furnirni plošči je pri prečnem furnirju lom raven, pri vzdolžnem pa nazobčan in poteka po strukturi lesa. Pri OSB plošči je na zunanjem sloju lom bolj nazobčan, v srednjem sloju pa je potek loma bolj raven. Najbolj homogen lom po celi debelini plošče ima LSB - konstrukcijska plošča, lom pa poteka "med gradniki" in je nazobčan. Pri zunanjem sloju iverne plošče, z višjo gostoto in manjšimi delci, je lom bolj raven; pri srednjem z nižjo gostoto in večjimi delci pa bolj nazobčan. Manjši kot so gradniki, bolj raven je potek loma, vendar so vlakna tu izključena. Pri vlakneni (MDF) plošči je lom zelo nazobčan in v plasteh ter spominja na lom vzdolžnega furnirja. Vsak posamezni sloj je relativno šibek, vendar skupaj tvorijo ploščo z boljšimi lastnostmi.

Language:Slovenian
Keywords:ploščni kompoziti, upogib, gostota, sila loma, potek loma
Work type:Diploma project paper (mb13)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2011
Publisher:[U. Centa]
Number of pages:IX, 41 f.
Place:Ljubljana
UDC:630*862
COBISS.SI-ID:1954953 Link is opened in a new window
Views:829
Downloads:270
Metadata:XML RDF-CHPDL DC-XML DC-RDF
 
Average score:(0 votes)
Your score:Voting is allowed only to logged in users.
:
Share:AddThis
AddThis uses cookies that require your consent. Edit consent...

Secondary language

Language:English
Title:Fracture analysis of wood-based panels caused by bending force : B. Sc. thesis
Abstract:
Thesis researches how the structure of a wood-based panel influences the fracture when loading the panel with a maximum bending force. Wood-based panels such as plywood, OSB, constructional, particleboard and fibre board panels, available on the market, were tested. We studied how the appearance of a fracture and mechanic characteristics of a particular layer influence the entire panel. The fracture of a transversal plywood panel is straight while the one of a longitudinal panel is jagged and follows the structure of wood. The fracture of a surface layer of an OSB panel is jagged while the course of a fracture inside the panel is straight. The most homogeneous fracture in all layers of a panel was noticed at LSB - constructional panel where the fracture took place among the components and was jagged. The surface layer of a particleboard with higher density and smaller parts has a straighter fracture, while the interior layer with lower density and larger parts has a more jagged structure. Smaller the parts, straighter the fracture; the fibres excluded. A fibre board (MDF) has an extremely jagged fracture at all layers and it is similar to the fracture of a longitudinal plywood panel. The test shows that individual layers of a fibre board are relatively weak, but all together they form a panel with best characteristics.

Keywords:composite plate, bending force, density, fracture force, fracture course

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Comments

Leave comment

You have to log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back