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Vpliv ortotropnih lastnosti lesa na napetostno polje in nastanek ter rast razpok pri sušenju : magistrsko delo magistrskega študijskega programa II. stopnje StrojništvoRožman, DavidLes je naravno gradivo, ki se zaradi večje okoljske ozaveščenosti čedalje pogosteje uporablja v inženirskih konstrukcijah. Težava uporabe lesa pa je, da začne ob izpostavljenosti vremenskim vplivom ... postopoma degradirati, kar se izrazi npr. v razpokanosti. Ker lahko razpoke, zlasti na nosilnih elementih večjih dimenzij, oslabijo njihovo trdnost in kvarijo videz, se jim poskušamo izogniti, za kar pa je potrebno dobro poznavanje mehanike procesov v lesu pri sušenju. V delu so obravnavani vplivi krčenja lesa zaradi procesa sušenja na napetostno polje, ki se pri tem pojavi. Izpostavljen je predvsem vpliv polarne ortotropnosti, ki je posledica rasti dreves. Postavljen matematični model, ki temelji na metodi končnih elementov, upošteva spreminjanje porazdelitve vlažnosti po prerezu v času in nastanek napetosti zaradi posledičnega krčenja. Pri tem je uporabljen konvekcijski robni pogoj sušenja. Algoritem je zmožen napovedati mesta največjih vrednosti nateznih napetosti in širjenje razpok v okroglem in kvadratnem preseku lesenega elementa.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [D. Rožman], 2022Language - slovenianCOBISS.SI-ID - 119969539
Author
Rožman, David
Other authors
Brojan, Miha
Topics
magistrske naloge |
les |
polarna ortotropnost |
vlažnost |
razpoke |
izoparametrični končni elementi |
master thesis |
wood |
polar orthotropy |
moisture |
crack |
isoparametric finite element
Library/institution |
City | Acronym | For loan | Other holdings |
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Faculty of Mechanical Engineering, Ljubljana | Ljubljana | FSLJ |
not for loan 1 cop.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Rožman, David | |
Brojan, Miha | 24560 |
Source: Personal bibliographies
and: SICRIS
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