Biology and Life Sciences

Biology and Life Sciences

Modeling of Physical and Mechanical Properties of five Wood Species growing in North Darfur with Anatomical Properties.

Pages: 11  ,  Volume: 29  ,  Issue: 2 , May   2019
Received: 28 May 2019  ,  Published: 11 June 2019
Views: 14  ,  Download: 10

Authors

# Author Name
1 Tageldin Hussein Nasroun
2 Nor Eldin Adam Abdallah Mohammed

Abstract

The strong relationship between anatomical properties of wood and many of its other properties were known for some time but it was not possible to quantify these relationships due to the difficulty in the past to make quantitative analysis for wood anatomy. With the discovery of the stereological techniques which facilitated the quantitative analysis of wood anatomy, it became possible to establish mathematical models relating physical, mechanical and other wood properties to anatomical properties. The main objective of this study was to determine some anatomical, physical, mechanical, and technological properties of the studied wood species and establish relationships between anatomical properties, as independent variables, and the other properties, as dependent variables, in the form of mathematical models with which we can predict physical and mechanical properties from anatomical properties and find the most important anatomical properties affecting the other properties. All anatomical properties were determined from macerated fibers. The physical properties tested comprised density, moisture content and shrinkage. Static bending was also carried out for determining modulus of rupture (MOR) and modulus of elasticity (MOE). This, in addition to compression parallel to the grain (COM). All physical and mechanical properties were carried out according to standard procedures. Analysis of variance, correlation analysis, simple regression and multiple regression analysis were carried out to achieve the objectives. The results of the analysis of variance revealed significant differences in most of the properties studied – anatomical, physical and mechanical between the five species. The details of these results are given in the first paper.

Keywords

  • Anatomical Properties; Physical Properties; Mechanical Properties; Modeling.
  • References

    Cave,I.D. and Walker,.C.F. (1994). Stiffness of wood in fast grown plantation softwoods: the influence of microfibril angle. Forest Prod. J. 44(5), 43-48. Green, D.W.and Rosales, A. (1996). Property relationships for tropical hardwoods. In: Proceedings, international wood engineering conference;(1996) October 21–31; New Orleans,LA. Madison, WI: Forest Products Society: 3-516–3-521. I so standard,(1976) Ifju, G., P Chimelo and T.H. Nasroun (1978).Structure- property relations for wood and wood products. Processing of inter- American Symposia on materials, SaoPaolo, Brazil:252-260. ISO 3787: (91976) standard: Wood- Determination of Ultimate Stress of Compression Parallel to the Grain. ISO 3787: (91976) standard: Wood- Determination of Ultimate Stress of Compression Parallel to the Grain. Jane, F.W. (1970).The Structure of Wood. 2nd ed. completely revised by K.Wilson and D.J.B White. London. Kretschmann, D.E. (2010).Mechanical Properties of Wood. Mechanical properties of wood. USDA (editor) Wood handbook: wood as an engineering material. Forest Products Laboratory, United States Department of Agriculture Forest Service, Madison, Wisconsin. pp 5.1-5.46. Nasroun, T. H., and Alshahrani, T. S. (1998). The Relationship between anatomical structure and density of wood. Journal of King Saud University, 10 (2): 235 - 251. Nasroun, T.H. (1979).Quantitative microstructural characteristics of seven tropical hardwoods and their relation to papermaking properties. M.Sc. Thesis. Virginia Polytechnic institute and State University, Blacksbary, Virginia, USA. Nasroun, T.H. (2005).Properties and Technology of wood. (Arabic Edition), Reyad, Kingdom, Saudia Arabia. 304p. Osman, M. E. (2001).Variation in density and fiber dimensions and the demarcation of juvenile and mature wood of ten trees species grown in Sudan. M.Sc. Thesis, University of Khartoum, Sudan. 123 p. Rammer, D.R. (2010). Fastenings. USDA (editor) Wood handbook: wood as an engineering material. Forest Products Laboratory, United States Department of Agriculture Forest Service, Madison, Wisconsin. pp 8.1-8.28 Roque,R.M.(2004).Effect of management treatment and growing regions on wood properties of Melina arborea in Costa Rica. New forest 28:325-330. Schinewind, A.P. ( 1989).Concise encyclopedia of wood and wood- based materials pergamon Press. 248P. Sudanese standard 1748: (2013) Wood – determination of redial and tangential shrinkage. Sudanese standard 1748: (2013) Wood – determination of redial and tangential shrinkage. Sudanese standard 5174: (2012) Wood – determination of density for physical and mechanical tests. Tsoumis, G. T. (1991): Science and Technology of Wood: Structure, Properties, and Utilization. New York: Chapman & Hall. 494p. Underwood, E.E.(1970). Quantitative Stereology. Addision- Wesly pub. Co., Reading, AM.274. Zobel, B.J.(1995).Genetics of wood production. Springer-Verlag, Berlin ,337pp