O presente estudo teve como objetivo determinar a flexão estática e a massa específica aparente da madeira de Inga marginata em diferentes condições de umidade. Foram abatidos três indivíduos com, aproximadamente, seis anos de idade. Para a determinação das propriedades estudadas foram seguidas as recomendações da norma ASTM D143-94. Observou-se redução superior a 1,2 vezes do módulo de elasticidade, módulo de ruptura, tensão no limite proporcional e força máxima na flexão estática em função da saturação das fibras. De maneira geral, as amostras apresentaram valores de massa específica aparente menores e maior resistência mecânica conforme a dessorção até a umidade de equilíbrio de 12%, sendo a madeira, nessa condição, classificada como moderadamente pesada.
Drying is an important process in the generation of wood products, as it increases the quality of the final products; however, it is influenced by various anatomical characteristics. The aim of this study was to evaluate the influence of anatomy on the drying of wood of Parapiptadenia rigida (Benth.) Brenan, Peltophorum dubium (Spreng.) Taub., Eucalyptus grandis W. Hill × Eucalyptus urophylla S.T. Blake (hybrid), and Schizolobium parahyba (Vell.) Blake trees from an agroforestry system. Three trees aged 9 years were sampled for each species. The trees were removed from the study region when their diameter at breast height (DBH) was 1.30 m from the ground. Blocks were made with dimensions of 5.0 × 5.0 × 15.0 cm for the evaluation of oven drying and 1.5 × 1.5 × 2.0 cm for anatomical features. S. parahyba has the highest value of fiber diameter (35.1 µm) and lumen diameter (27.6 µm), whereas P. dubium had the highest value of cell wall thickness (6.8 µm). The average equilibrium moisture content was 10.98% after 40 days of drying. The anatomy of the wood influenced the drying of the four species intensity, which was related to humidity during all periods. The anatomical parameters that most influenced drying were fiber diameter (Pearson correlation coefficient: 0.77), lumen diameter (0.76), and fiber cell wall thickness (0.73); the higher the values, the greater was the drying intensity.
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