Determination of the material constants of composite materials on the example of modified wood

• Autorzy: Kyzioł L.

Identyfikatory

DOI

10.5604/01.3001.0010.2910

• Języki publikacji: EN

Abstrakty

EN

Homogenization is the transition from the level of microscopic heterogeneity to a homogeneous macroscopic level. The analysis of the value of equivalent parameters and their variability requires prior determination of the influence of microstructure on the values of these parameters [15]. Wood is a composite material and has a layered structure in the form of alternate layers of soft and hard wood. One of the main issues was the determination of constants materials of individual layers of natural wood and modified and then equivalent material constants of natural and modified wood. The material constants of single layers and the material constants of composite were determined on the basis of experimental studies. For this purpose, a homogenization method has been used to determine equivalent material constants on the basis of material constants of single layers of soft and hard wood [1, 2, 14]. A representative cell consisting of a softwood and hardwood layer has been isolated from the sample-measuring portion. On the basis of this cell have been developed mathematical model of equivalent material constants. A sample consisting of two layers was subjected to an even stretch in the direction of the axes x1, x2, x3. The equivalent material constants have been defined by using equilibrium conditions, geometric conditions, and Hooke’s generalized law. Each wood component on the micro-level is homogeneous, continuous with its constitutive equation, conservation laws, and boundary conditions at the boundary of the separation of components. The equivalent material constants of natural and modified wood have been determined using the homogenization method [12, 13]. The results obtained from the research and the results obtained from the calculations are very similar.

Słowa kluczowe

EN

modified wood; polymethylmethacrylate; homogenization; equivalent material constants

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2017
• Tom: Vol. 24, No. 2
• Strony: 133--140
• Opis fizyczny: Bibliogr. 15 poz., rys.

Twórcy

autor

Kyzioł L.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.: + 48 694 476 390

Bibliografia

• [1] Boding, J., Jayne, B. A., Mechanics of wood and wood composites, Van Nostrand Reinhold, New York 1982.
• [2] Kowalski, S. J., Kyzioł, L., Rybicki, A., Composite of wood and polymerized methacrylate, Composites, Part B, Vol. 33, pp.77-86, 2001.
• [3] Kuś, H., Biomaterials, t. IV, WKiŁ, Warszawa 1990.
• [4] Kyzioł, L., Influence of saturation of pine wood with methylmethacrylate on its mechanical properties, Conference materials Polymers and Structural Composites, Ustroń, Silesian University of Technology, pp. 195-202, 1998.
• [5] Kyzioł, L., Modified wood – a promising material for shipbuilding, Polish Maritime Research, pp. 6-10, 1999.
• [6] Kyzioł, L., Distribution of Methylmethacrylate concentration in a porous material, Marine Technology Transactions, Vol. 10, pp. 175-190, 1999.
• [7] Kyzioł, L., Examination results of methylmethacrylate concentration in modified woods, Marine Technology Transactions, Vol. 11, pp. 181-194, 2000.
• [8] Kyzioł, L, Kowalski, S. J., Musielak G., Non-linear model for wood saturation, Transport in Porous Media, Vol. 46, pp.77-89, 2002.
• [9] Kyzioł, L., The influence of polymethylmethacrylate content in a wood composite on its impact strength, Marine Technology Transactions, Vol. 12, pp. 137-149, 2001.
• [10] Kyzioł, L., Influence of polymethylmethacrylate content in wood composite on the anisotropy of elasticity properties, Marine Technology Transaction, Vol. 13, pp. 127-139, 2002.
• [11] Kyzioł, L., The material constants of the modified wood, AMW Scientific Papers, No. 1, Gdynia, pp. 13-29, 2003.
• [12] Kyzioł, L., Analysis of the properties of structural wood saturated surface polymer MM, Naval Academy in Gdynia, No. 156 A, 2004.
• [13] Kyzioł, L., Wood modified for marine structures, Publisher Naval Academy in Gdynia, 2010.
• [14] Lechnicky, S. G., Theory of elasticity anisotropic media, Nauka – Moscow 1977.
• [15] Łydżba, D., Application of asymptotic homogenization method in soil and rock mechanics, Wroclaw University of Technology, Wroclaw 2002.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).