Abstract:
Eucalyptus presents heterogeneity Pesquisa Científica e Inovação Tecnológica nas Engenharias Capítulo 14 159 of physical-mechanical characteristics and has difficulty anatomical identification. This paper analyses the viability of Janka hardness (considered a non-destructive test) as an estimator of density, compression strength and modulus of rupture. The 43 eucalyptus logs were analyzed using a exponential function (linearized through the natural logarithm) for Janka hardness and dependent variables. It was observed that the dispersions around the regression curves increase, but on the transformed scale these dispersions are constant. The regression analysis results showed that there is a correlation of apparent density at 15% of moisture content, flexural strength and green state compression with the Janka hardness on green wood. Eucalyptus presented regression curve with a coefficient of determination between 0.80 and 0.84, with dispersion between 6% and 10%. It was concluded that the Janka hardness property can be used as density estimator and resistance to flexionDureza Janka.
Reference:
YOJO, Takashi; SOUZA, Cassiano Oliveira de; MIRANDA, Maria José de Andrade Casimiro; BRAZOLIN, Sergio. Dureza janka como estimador da densidade aparente e das resistências à flexão e compressão em eucalipto. In: TULLIO, Franciele Braga Machado (Org.) Pesquisa científica e inovação tecnológica nas engenharias. Ponta Grossa: Atena Ed., 2019. On line. v.1, Cap.14, p.158-166.
Access to the Book Chapter on BiblioInfo:
http://aleph.ipt.br/F/6YSUDCR5QAL6QFUCPGPAKGUDRD8TCR6CSJ7HSL6AJ5AN8G8MNT-17266?func=full-set-set&set_number=317334&set_entry=000001&format=999
Eucalyptus presents heterogeneity Pesquisa Científica e Inovação Tecnológica nas Engenharias Capítulo 14 159 of physical-mechanical characteristics and has difficulty anatomical identification. This paper analyses the viability of Janka hardness (considered a non-destructive test) as an estimator of density, compression strength and modulus of rupture. The 43 eucalyptus logs were analyzed using a exponential function (linearized through the natural logarithm) for Janka hardness and dependent variables. It was observed that the dispersions around the regression curves increase, but on the transformed scale these dispersions are constant. The regression analysis results showed that there is a correlation of apparent density at 15% of moisture content, flexural strength and green state compression with the Janka hardness on green wood. Eucalyptus presented regression curve with a coefficient of determination between 0.80 and 0.84, with dispersion between 6% and 10%. It was concluded that the Janka hardness property can be used as density estimator and resistance to flexionDureza Janka.
Reference:
YOJO, Takashi; SOUZA, Cassiano Oliveira de; MIRANDA, Maria José de Andrade Casimiro; BRAZOLIN, Sergio. Dureza janka como estimador da densidade aparente e das resistências à flexão e compressão em eucalipto. In: TULLIO, Franciele Braga Machado (Org.) Pesquisa científica e inovação tecnológica nas engenharias. Ponta Grossa: Atena Ed., 2019. On line. v.1, Cap.14, p.158-166.
Access to the Book Chapter on BiblioInfo:
http://aleph.ipt.br/F/6YSUDCR5QAL6QFUCPGPAKGUDRD8TCR6CSJ7HSL6AJ5AN8G8MNT-17266?func=full-set-set&set_number=317334&set_entry=000001&format=999
