Fatigue strength of wood polymer composite

• Autorzy: Kyzioł L.

Identyfikatory

DOI

10.5604/12314005.1134063

• Języki publikacji: EN

Abstrakty

EN

This paper presents the results of a study on the fatigue strength in pendulum bending natural and modified pinewood. The contents of polymethyl methacrylate (PMMA) were determined in wood-polymer for mechanical and rheological properties. The study of the bending fatigue strength and creep was realized on suitably prepared samples and research positions. Test results were documented in the form of charts and scraps. Differences in the decay of the natural and modified wood samples were observed after the attempt of the fatigue strength. The various mechanical properties of the sapwood, hardwood, and the polymer, influence on the stiffness of the individual components and consequently the whole composite. The process of fatigue degrades the structure of natural wood and wood polymer composite, the result is a gradual reduction of its stiffness. The Study of the creep behaviour was realized in stress in the sample of the level of 30% of the tensile strength. The samples were loaded longitudinally and transversely to the direction of the fibres. Significant differences of composite deformations were observed both as for the direction of the loaded fibres as well as the natural and modified wood. The character of changes in the fatigue strength and creep behaviour of the studied materials is implies to the influence of the polymer content on mechanical properties of modified wood. The tests carried out on account of the possibility of using wood polymer composite in sea constructions. Research carried out in connection with the possibility of the use of wood polymer composite marine construction. Modified wood can be used for keel blocks, decks, fender beam, bearings cantilevered shaft lines and the construction of yachts.

Słowa kluczowe

EN

modified wood; mechanical properties; fatigue strength; device to inflict plane stress

• 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: 2014
• Tom: Vol. 21, No. 1
• Strony: 139--146
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Kyzioł L.

• Maritime University in Gdynia Faculty of Marine Engineering Morska Street 81/87, 81-225 Gdynia tel.: [phone]

Bibliografia

• [1] Galuppi, L., Royer-Carfagni, G., Buckling of three-layered composite beams with viscoelastic interaction, Composite Structures, 107, pp. 512-521, 2014.
• [2] Kolat, K., Neşer, G., Ozes, C., The effect of sea water exposure on the interfacial fracture of some sandwich systems in marine use, Composite Structures, 78, pp. 11-17, 2007.
• [3] Kyzioł, L., Properties analysis of construction wood saturated polymer MM, AMW, Gdynia 2004.
• [4] Kyzioł, L., Distribution of methylmethacrylate concentration in a porous material, Marine Technology Transactions, Vol. 10, pp. 175-190, 1999.
• [5] Kyzioł, L., The influence of polymethyl methacrylate content in a wood composite on its impact strength, Marine Technology Transactions, Gdańsk, Vol. 12, pp. 137-149, 2001.
• [6] Ławniczak, M., Walentynowicz, T., Modified wood (Lignomer) – properties and applications, PWN, Agricultural and Forest, Poznań 1979.
• [7] Ławniczak, M., Hruzik, G., Walentynowicz, T., The analysis of industrial technology for modification of wood by thermal polymerization, Report with the work, n.b., AR Poznań 1979.
• [8] Mouritz, A. P, Gellert, E., Burchill, P., Challis, K., Review of advanced composite structures for naval ships and submarines, Composite Structures, 53, pp. 21-41, 2001.
• [9] Ochelski, S., Experimental methods mechanics of structural composites, WNT 2004, Warsaw.
• [10] Schniewind, A. P., Progress in the study of the Rheology of Wood, Wood Sciences and Technology, Vol. 2, No. 2, pp. 188-206, 1968.