Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Universidade de Lisb...arrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
UTL Repository
Master thesis . 2010
Data sources: UTL Repository
versions View all 2 versions
addClaim

Caracterização das propriedades mecânicas e durabilidade biológica da madeira de Quercus faginea

Authors: Ramos, Sofia Isabel Nunes;

Caracterização das propriedades mecânicas e durabilidade biológica da madeira de Quercus faginea

Abstract

Although the Portuguese oak wood (Quercus faginea L.) has been used in shipbuilding in the past, nowadays it has hardly any use and the knowledge about it is scarce, which requires the characterization and study of its potential for noble use. In this study physical and mechanical properties of Portuguese oak were determined, and the resistance to attack by subterranean termites evaluated, using standard methodologies. Ten trees were used from two regions in Trás-os-Montes. The results showed that this wood is heavy (870 kg/m3), has a heartwood with a very high hardness (101 N/mm2), with low bending strength (99 N/mm2), medium compression strength (47 N/mm2) and is moderately durable regarding termite attack. To evaluate its behavior in composite products, 30 oak wood pieces with three thicknesses were produced and glued on spruce wood (Picea abies H. Karsten). The results showed that hardness of the composites was not very affected for the tested oak wood dimensions.------------------------------Apesar de a madeira de carvalho português (Quercus faginea L.) ter sido aplicada no passado na construção naval, hoje pouco se utiliza e pouco se conhece, o que requer a sua caracterização e o estudo do seu potencial para uso nobre. Neste trabalho determinaram-se propriedades físico-mecânicas da madeira de carvalho português e avaliou-se a sua resistência ao ataque de térmitas subterrâneas, utilizando metodologias normalizadas. Foram utilizadas dez árvores provenientes de duas regiões de Trás-os-Montes. Os resultados mostraram que a madeira é pesada (870 kg/m3), tem dureza muito alta no cerne (101 N/mm2) e apresenta resistência fraca quanto à tensão de ruptura à flexão estática (99 N/mm2) e média quanto à compressão (47 N/mm2). Face ao ataque de térmitas subterrâneas, esta madeira é classificada como moderadamente durável. Para avaliar o comportamento em produtos compósitos, produziram-se 30 peças com três espessuras de madeira de carvalho português, coladas a madeira de espruce (Picea abies H. Karsten). Os resultados demonstram que a qualidade dos produtos compósitos quanto à sua dureza não é fortemente afectada para as dimensões estudadas.

Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia

Country
Portugal
Keywords

módulo de elasticidade, modulus of elasticity, mechanical properties, fendimento, durabilidade natural, hardness, natural durability, carvalho português, dureza, cleavage, tensão de ruptura, Quercus faginea

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
    OpenAIRE UsageCounts
    Usage byUsageCounts
    visibility views 6
    download downloads 216
  • 6
    views
    216
    downloads
    Powered byOpenAIRE UsageCounts
Powered by OpenAIRE graph
Found an issue? Give us feedback
visibility
download
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
OpenAIRE UsageCountsViews provided by UsageCounts
downloads
OpenAIRE UsageCountsDownloads provided by UsageCounts
0
Average
Average
Average
6
216
Green