Modeling of Yielding Processes in Porous and Anisotropic Natural Materials

• Autorzy: Malujda I. , Talaśka K.
• Konferencja: Polish-Slovak Scientific Conference on Machine Modeling and Simulation - MMS 2010 (15 ; 31.08-1.09.2010 ; Krasiczyn, Poland)
• Języki publikacji: EN

Abstrakty

EN

The paper presents the yield criterion for wood changing its moisture, temperature and a critical load in three anatomic directions. The basis for this criterion is the Hill criterion for anisotropy. Moreover the purpose of this paper is to present the results of experimental strength testing of wood at higher temperature and moisture conditions. The values of material constants and coefficients such a plastic strain ratio and factors of proportionality represent the anisotropic qualities of wood and are taken from our experiments. Thus, we have automatically included the effect of coupling between stresses, temperature and moisture. Some test results are also presented.

Słowa kluczowe

EN

yield criterion; critical stress; anisotropy; porosity; temperature

PL

kryterium wydajności; naprężenie krytyczne; anizotropia; porowatość; temperatura

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Research
• Rocznik: 2010
• Tom: Vol. 34, No. 4
• Strony: 42--52
• Opis fizyczny: Bibliogr. 10 poz., wykr.

Twórcy

autor

Malujda I.

autor

Talaśka K.

• Poznań University of Technology. Chair of Machine Design Fundamentals,

Bibliografia

• Ashby, M. F., 1996, Material selection in mechanical design,WNT, Warszawa (in Polish).
• Dudziak, M., Mielniczuk J., 2001, The unclassic models of materials in mechanical design, Wydawnictwo i Zakład Poligrafii Instytutu Technologii Eksploatacji, Radom.
• Hill, R., 1956, The Mathematical Theory of Plasticity, Oxford at the Clarendon Press.
• Kania, S., 1990, Heat flow through wood materials, Wyd. Pol. Wrocławskiej ( in Polish).
• Krzysik, F., 1978, The Science of Wood, PWN, Warszawa.
• Kubler, H., Yi - Ren Wang., Barkalov, D., 1985, Generation of heat in wood between 80 and 130°C, Holzforschung, 39, 85-89.
• Malujda, I., 2008, Simulation of heat conduction in plasticization process of non-classica materials, Sbornik vedeckych praci Vysoke skoly banske - Technicke university Ostrava, cislo 1, rocnik LI.
• Malujda, I., 2008, Plasticization of a bounded layer of anisotropic and porous materials, Journal of Mechanics of Materials and Structures, PACAM X: Mechanics Pan America, 12, 386-390.
• Szczepiński, W., 1978, The mechanic of plastic flow, PWN, Warszawa (in Polish).
• Walczak, J., 1978, The endurance of materials and the basis of the theory of the resilience and plasticity, PWN, Warszawa - Kraków (in Polish).