Tension Wood
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Efeito da furfurilação em propriedades físicas e mecânicas da madeira de Pinus elliottii
RESUMO As madeiras de Pinus apresentam características indesejáveis às quais podem ser atenuadas com a aplicação de tratamentos, no qual é destacado a furfurilação. Sendo assim, o objetivo deste trabalho foi avaliar o efeito da impregnação de álcool furfurílico nas propriedades físicas e mecânicas da madeira de Pinus elliottii. Para tanto, fora
Matéria (Rio J.). Publicado em: 16/09/2019
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2. STRESS, DISPLACEMENT JOINTS OF GMELINA ARBOREA AND TECTONA GRANDIS WOOD WITH METAL PLATES, SCREWS AND NAILS FOR USE IN TIMBER TRUSS CONNECTIONS
ABSTRACT In countries like Costa Rica, there is an interest in developing wooden trusses in a versatile and light way. However, there is a key aspect in the behavior of truss connections in this product. Therefore, the present study determines the structural behavior of the truss connections and the displacement, the resistance, the stiffness values and the
CERNE. Publicado em: 09/09/2019
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3. Properties of Young Guapuruvu (Schizolobium parahyba) Wood from a Forest Recovery Area
ABSTRACT Guapuruvu is one of the fastest growing Atlantic Forest species. It is also considered one of most important species in forest recovery areas, starting to compete with other individuals during the second stage of succession, as well as showing a capacity to be harvested and processed at this stage, after fulfilling its function as a pioneer. There
Floresta Ambient.. Publicado em: 28/05/2018
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4. Hydraulic architecture of lianas in a semiarid climate: efficiency or safety?
Xylem anatomical traits can provide insights regarding the mechanisms affecting the distribution of vascular plants across environmental gradients. In this study, we aimed to investigate the hypothesis that lianas occurring in semiarid environments have characteristics that maximize the xylem resistance to tension-induced cavitation along the root-stem-branc
Acta Bot. Bras.. Publicado em: 2015-06
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5. Bounded creativity: understanding the restrictions on creative work in advertising agencies
The theme of creativity has gained prominence among practitioners and academics, and the emergence of creative industries, which combine creativity and commercial logic, has rendered the topic even more relevant. Creativity is frequently associated with the existence of flexible organizational structures and organizational cultures that favor autonomy and fr
BAR, Braz. Adm. Rev.. Publicado em: 2015-03
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6. Ensaios uniaxiais e biaxiais para avalição de criterio de resistencia de materiais anisotropicos aplicado a madeira / Uniaxial and biaxial tests for avaliation of failure criterion of anisotropic material applied to wood
The completion of the uniaxial and biaxial tests permits a better understanding of the mechanical behavior of a material that has main failure directions and it is undoubtedly a method that researchers identified to achieve consistent results with the actual situation that a particular structure presents. This study aimed at studying the strength criterion p
Publicado em: 2009
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7. Propriedades tecnológicas de vigas de madeira laminada colada produzidas com louro-vermelho: (sextonia rubra)
The objective of this study was characterize the technological behavior of glulam beams (MLC) using the wood from Louro Vermelho (Sextonia rubra Lauraceae), through the evaluation of the adhesion with adhesive resorcinol-formaldehyde and evaluate theoretically and experimental the modulus of elasticity (EM), the modulus of rupture (fM), the bending moment (M
Publicado em: 2009
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8. Tension wood in Eucalyptus cultivated on different topographies / Lenho de traÃÃo em Eucalyptus spp cultivado em diferentes topografias
PlantaÃÃes clonais de Eucalyptus estabelecidas na regiÃo do Vale do Rio Doce (MG) vÃm sofrendo a aÃÃo de tempestades de verÃo que causam danos e prejudicam o seu desenvolvimento. Esses danos sÃo mais evidentes quando as plantaÃÃes atingem dois anos de idade. A topografia da regiÃo, onde os eucaliptais sÃo implantados, compreende Ãreas de baixada
Publicado em: 2007
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9. Fiberglass-reinforced glulam beams: mechanical properties and theoretical model
The glued-laminated lumber (glulam) technique is an efficient process for making rational use of wood. Fiber-Reinforced Polymers (FRPs) associated with glulam beams provide significant gains in terms of strength and stiffness, and also alter the mode of rupture of these structural elements. In this context, this paper presents a theoretical model for designi
Materials Research. Publicado em: 2006-09
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10. Estudo de criterios de resistencia de materiais anisotropicos aplicados a madeira / Study of anisotropic material failure criteria, applied to wood
This research deals with the study of anisotropic material failure criteria, specifically TSAI- WU tensor failure criteria, and theoretical and experimental applications for wood. Thus it was carried out a theoretical revision of the principal themes related to this research: general failure criteria, Hankinson s formula, TSAI-WU tensor criterion, failure mo
Publicado em: 2006
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11. Caracterização da madeira de tração em Eucalyptus grandis e sua influência na produção de polpa celulósica / Characterization of tension wood in Eucalyptus grandis and evaluation of its effect on Kraft pulp production
The reaction wood in broadleaved tress, usually called tension wood, is found on the top side of stems and branches, causing them to reorient themselves by longitudinal shrinkage. It is characterized by a high proportion of cellulose and low of lignin, when compared to normal wood. The fibers usually show an abnormally thick wall, called gelatinous layer, on
Publicado em: 2004
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12. CHP: chapas de partículas homogêneas - madeiras do Nordeste do Brasil / CHP: foils of homogeneous particles - wood of the Northeast of Brasil
In the development of this work, concepts were analyzed and proposed seeking to evidence the possibility of technological changes for the socio-economic growth of the Brazilian northeast region. It still hovers a pré-established concept about Brazilian northeast: it is treated as an area without possibility of providing its own needs. It is necessary to rev
Publicado em: 2003