Principal Mechanical Properties of Cypress Wood (Cupressus Sempervirens L.) Naturally Grown in (Kahramanmaraş) Eastern Mediterranean of Turkey

Year 2010, Volume: 23 Issue: 3, 357 - 362, 06.07.2010

İbrahim Bektaş , Ramazan Kurt

Abstract

Some mechanical properties (compression, static bending, impact bending, shear strength and Janka hardness) of cypress wood (Cupressus sempervirenss L.) were evaluated in accordance with Turkish Standards and compared with other cypress’ properties. Samples were taken from randomly collected logs naturally grown in Northeastern Mediterranean region (Kahramanmaraş) of Turkey. The results showed that the mean values of compression strength parallel to grain, static bending strength, impact bending strength, shear strength parallel to grain, Janka hardness (cross), Janka hardness (radial) and Janka hardness (tangential) were 45.8 N/mm², 76.8 N/mm², 0.051 J/mm², 6.5 N/mm², 623 N/ mm², 510 N/mm²,  and 543 N/mm², respectively. The relationship between strength and density was determined using regression analyses, and these were compared with other available published values in the literature. The results showed that cypress wood grown in Kahramanmaraş and the other cypresses have similar mechanical properties and density.

 

 

Key Words: Cypress wood, compression strength, static bending strength, impact bending strength, shear strength, Janka hardness.

Keywords

Cypress wood, compression strength, static bending strength, impact bending strength, shear strength, Janka hardness

References

• Yaltırık, F., “Dendrology II”, Publications of Faculty of Forestry of Istanbul University, Istanbul, 109-116 (1993).
• Goker, Y., “Mediterreanen’s Forests of Turkey and approachings scientifically on these Forests”, Pub. ORUAREN of Faculty of Forestry of University of Istanbul, Đstanbul, 170-180 (1992).
• Anonim, “The capacity of Turkish forests”, The Publication Institutions of Turkish Forestry Research, Ankara, Turkey, 25-48 (1987).
• Anonim, “South American Hardwoods: Tree and wood characteristics”, http://beachshack.ai/woods.html(15.06.2009).
• Bozkurt, A.Y., Göker, Y., "The Researchings on properties of physical and mechanical of Cupressus sempervirens var. horizontalis’s wood and its usage areas”, Doğa Journal, TU Tar ve Or. DC 12, S 1, TUBITAK-ORUTAR Project, Ankara, (1988).
• Göker, Y., As, N., “The Elastisity Modul of Cupressus sempervirens var. horizontalis ‘s wood”, Journal of Đ.Ü, Faculty of Forestry, Serial: A, Đstanbul, 40(1):28-39 (1990).
• Chudnoff, M., “Agriculture Handbook”, The Pub. of USDA Forest Service. Pub.No: 607, Washington, DC, 78-110,(1984)
• Gonzalez T., Gonzalez, G.E., “Propiedades fisicas, mecanicas, usos y otras caracteristicas de algunas maderas comercialmente importantes en Costa Rica”, Parte I. Laboratorio de Productos Forestales, San Pedro, 140-145 (1973).
• Record, S.J., Hess, R.W., “Timbers of the new world”, Yale University Press, New Haven, Conn, 102-105 (1949).
• USDA, “Wood handbook”, Pub.of Forest Products Society; ISBN: 1892529025, Washington DC, 420428 (1999).
• As, N., “The effect of different origins on the physical, mechanical and technological properties of Pinus pinaster”, Ph. D. Thesis, The Scientific Institute of Istanbul University, Đstanbul, 280-299 (1992).
• Panshin , A.J., Dezeeuw, C., “Textbook of Wood Techonolgy”, Fifth ed. Vol. 1, McGraw Hill, New York, 125-198 (1980).
• Bektas, I., Alma, M.H., As, N., Gundogan, R., “Relationship Between Site Index and Several Mechanical Properties of Turkish Calabrian Pine (Pinus brutia Ten.)”, For. Prod. J., 53 (2), Ankara, 27-31(2003).
• Bektaş, Đ., “The physical and mechanical properties of Calabrian pine (Pinus brutia Ten.) and their variations according to regions”, Ph. D. Thesis, The Scientific Institute of Istanbul University, Istanbul, 200-249 (1997).