Credit hours
In-class work per week |
Practice per week |
Credits |
Duration |
Total |
3 |
6 |
8 |
10 weeks |
120 hours |
Instructor
Geraldo Bortoletto Junior
Ivaldo Pontes Jankowsky
Objective
To present the basic knowledge about the main physical and mechanical properties of wood, as well its relationship. To discuss the principal alternatives of wood industrialization through mechanical processing, analyzing the interference of physical and mechanical characteristics both in manufacturing process and in final product properties.
Content
Definition of physical property; main physical properties of wood, interrelationships. Specific gravity, density and basic density; methods of determination, variations within the tree, interactions with the other properties. Hygroscopicity, equilibrium moisture content and fiber saturation point. Dimensional change; methods for determination, comparison between standardized test methods. Definitions and basic concepts of mechanical properties of wood: strength, resistance, tension, deformation, Hooke Law, diagram tension/deformation, proportional limit, modulus of elasticity and modulus of rupture. Factors affecting the mechanical properties of wood: moisture, specific gravity, presence of defects, temperature, loading speed, load increment, size and shape of samples, test methods. Main types of mechanical tests of wood: bending, traction, compression, shear, hardness, toughness, splitting, nail withdrawal.
Bibliography
Books and theses:
ANDRADE, A.; JANKOWSKY, I. P. Pisos de madeira: características de espécies brasileiras. Piracicaba: ANPM-Associação Nacional dos Produtores de Pisos de Madeira, 2015. v. 1. 184p.
BOWYER, J.L.; HAYGREEN, J.G.; SHMULSKY, R. Forest products and wood science: an introduction. Ames, Iowa: Blackwell, 2007. 558p.
GALVÃO, A.P.M. & JANKOWSKY, I.P. Secagem racional da madeira. São Paulo, Nobel, 1985. 112 p.
JANKOWSKY, I. P. Metodologia simplificada para a indicação de programas de secagem. 2009. 119 p. Tese (Livre Docência) – Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Piracicaba, 2009.
HOADLEY, R.B. Understanding wood a craftsman’s guide to wood technology. Newtown, Tauton Press, 2000. 280p.
KOLMANN, F.F.P.; CÔTÈ, W.A. Principles of wood science and technology. Vol 2: Solid Wood. New York, Springer Verlag, 1968. 592 p.
PANSHIN, A.J.; ZEEUW, C. Textbook of wood technology. New York, Mcgraw-Hill, v.1. 1970. 705 p.
SCHWEINGRUBER, F.H. Wood structure and environment. Berlin, Springer, 2007. 279p.
SIAU, J.F. Transport processes in wood. Berlin, Springer-Verlag, 1984. 245 p.
SKAAR, C. Wood-water relations. New York, Springer-Verlag, 1988. 283 p.
SUCHSLAND, O. The swelling and shrinking of wood a practical technology primer. Madison, Forest Products Society, 2004. 189p.
USDA/FOREST SERVICE. Wood handbook: wood as an engeneering material. Madison: FPL. 2010. Disponível em: http://www.fpl.fs.fed.us/documnts/fplgtr/fpl_gtr190.pdf
VIGNOTE PEÑA, S.; ROJAS, I.M. Tecnología de la madera. Madrid, Ediciones Mundi-Prensa, 2006. 687p.
Artigos:
ARAÚJO, H.J.B. Relações funcionais entre propriedades físicas e mecânicas de madeiras tropicais brasileiras. Floresta, Curitiba, v.37, n.3, p.399-416, set./dez.2007.
BEALL, F.C. Industrial applications and opportunities for nondestructive evaluation of structural wood members. Maderas: Ciencia y Tecnología, Concepcion, v.9, n.2, p.127-34, 2007.
BORTOLETTO JÚNIOR, G. Estudo de algumas propriedades físicas e mecânicas da madeira de Pinus merkusii. Scientia Forestalis, Piracicaba, v. 36, n.79, p. 237-243, 2008.
JANKOWSKY, I.P.; LUIZ, M.G. Review of wood drying research in Brazil: 1984-2004. Drying Technology, v. 24, p. 447-455, 2006.
RESCH, H. Considering changes in wood utilization: A European perspective. Maderas: Ciencia y Tecnología, Concepcion, v.10, n.1, p.61-8, 2008.
TAKESHITA, S.; JANKOWSKY, I. P. Redução na movimentação dimensional da madeira de Jatobá (Hymenaea sp.) e Muiracatiara (Astronium sp.) submetidas a tratamento térmico adicional. SCIENTIA FORESTALIS, v. 43, p. 345-352, 2015.
Journal:
Wood Science and Technology; Forest Products Journal; European Journal of Wood and Wood Products; Maderas: Ciencia y Tecnología; Scientia Forestalis; Cerne; Árvore.