Influence of Temperature during Plasticization of Anisotropic Material, Numerical Analysis

• Autorzy: Malujda I.
• Konferencja: International Conference on Modelling and Simulation of the Friction Phenomena in the Physical and Technical Systems "FRICTION 2008" (5 ; 31.05-1.06.2008 ; Warsaw, Poland) ; French-Polish Seminar of Mechanics (16 ; 31.05-1.06.2008 ; Warsaw, Poland)
• Języki publikacji: PL

Abstrakty

EN

This paper presents analysis of a stress distribution in a thin layer of wood being subject to a plasticization process under the influence of pressure and temperature. The applied mathematical model was based on the generalized model of an ideally plastic medium. The condition of plasticity was formulated on the basis of the volumetric strain critical energy hypothesis modified to accommodate for the porous and anisotropic properties of wood. The critical effort was defined by a dependence which accounts for constitutive relationships characteristic for the discussed process. An analyzed layer of oak-wood in the form of a natural veneer was subject to a load of hot rolling cylinder of a specified temperature. In the discussed case the process of wood plasticization occurred during an increase in temperature, therefore, a previously determined temperature distribution was used to calculate numbers to be used in an equation defining the critical stress taking into account anisotropy and temperature The calculations were carried out on practically used data, reflecting the process of oak wood refining applied in industrial conditions.

Słowa kluczowe

PL

temperatura; plastyfikacja; granica płynięcia; porowatość; anizotropia

EN

temperature; plasticization; yield point; anisotropy; porosity

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Problems
• Rocznik: 2008
• Tom: Vol. 32, No. 3
• Strony: 51--60
• Opis fizyczny: Bibliogr. 8 poz., wykr.

Twórcy

autor

Malujda I.

• Poznan University of Technology,

Bibliografia

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• Kleiber, M., Służalec, A. S., 1983, Numerical analysis of heat flow in flash welding, Arch. Mech., 35, 687-699.
• Kuhlmann, G., 1962, Investigation of the thermal properities of wood and particleboard in dependence from moisture content and temperature in the hygroskopic range, Holz Ah Roh- und Werkstoff, 20 (7), 259-270.
• Krzysik, F., 1978, Wood Science, PWN Warszawa.
• Malujda I., Mielniczuk J., 2004, Mathematical Model of wood hot rolling process, GAMM, 75-th Annual Scientific Conference - Book of abstract, p. 95.
• Malujda, I., 2004, Use of a model of anisotropic and porous material plasticization for solving yield points in a layer of wood, Materials Engineering, No 1, 129-134, Zilina.