Analysis of the process of wood plasticization by hot rolling

• Autorzy: Dudziak M. , Malujda I. , Talaśka K. , Łodygowski T. , Sumelka W.

Identyfikatory

DOI

10.15632/jtam-pl.54.2.503

• Języki publikacji: EN

Abstrakty

EN

In this research, a mathematical model is derived to enable analytical determination of effective ultimate forces in the process of plasticization of the surface layer of wood. The experimentally determined thermo-mechanical properties of the material subjected to the process of plasticization are used in defining the structure of the model. The analysis of plastic strain in the layer in consideration is based on a generalised model of an ideally rigid-plastic medium, including certain modifications. Considering the anisotropic properties of wood, the Azzi-Tsai-Hill (ATH) strength criterion is applied which takes into account variation in the response of the loaded material depending on the direction. The article presents also results of FEM analysis of the same process of hot rolling of wood.

Słowa kluczowe

EN

yield point; temperature; moisture content; porosity; orthotropy

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2016
• Tom: Vol. 54 nr 2
• Strony: 503--516
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Dudziak M.

• Politechnika Poznańska

autor

Malujda I.

• Politechnika Poznańska

autor

Talaśka K.

• Politechnika Poznańska

autor

Łodygowski T.

• Politechnika Poznańska

autor

Sumelka W.

• Politechnika Poznańska

Bibliografia

• 1. Ashby M.F., Jones D.R.H., 1996, Engineering Materials (in Polish), WNT, Warszawa
• 2. Bednarski T. 1995, Mechanics of Plastic Flow at a Glance (in Polish), PWN, Warszawa 1995
• 3. Bordia R.K., Zuo R., Guillon O., Salamone S.M., Rodel J., 2006, Anisotropic constitutive laws for sintering bodies, Acta Materialia, 54, 111-118
• 4. Fujii Y., Okumura S., Inoue M., Adachi K., 2003, FE-analysis of roll pressing of wood, Proceedings of 16th International Wood Maschining Seminar, Matsue, Japan, 410-413
• 5. Forest Products Laboratory, 1999, Wood as an engineering material, Gen. Tech. Rep. FPL-GTR- -113, Madison, WI: U.S. Department of Agriculture, Forest Service
• 6. German J., 2001, Fundamentals of Mechanics of Fiber Composites (in Polish), Publishing House of Cracow University of Technology, Kraków
• 7. Gu H.M., Zink-Sharp A., 2005, Geometric model for softwood transverse thermal conductivity. Part I, Wood and Fiber Science, 37, 4, 699-711
• 8. Harada, T., Hata, T., Ishihara Sh. 1998, Thermal constants of wood during the heating process measured with the laser flash method, Journal of Wood Science, 44, 425-431
• 9. Hill R., 1956, The Mathematical Theory of Plasticity, Clarendon Press, Oxford
• 10. Kokociński W., 2004, Wood: Measurement of Physical and Mechanical Properties, Poznań
• 11. Mackenzie-Helnwein P., Eberhardsteiner J., Mang H.A., 2005, Rate-independent mechanical behavior of biaxially stressed wood: experimental observations and constitutive modelling as an orthotropic two-surface elasto-plastic material, Holzforschung, 59, 3, 311-321
• 12. Malujda I., 2006, Plasticization of a bounded layer of anisotropic and loose material, Machine Dynamics Problems, 30, 4, 48-59
• 13. Malujda I., Marlewski A., 2011, On the heat conduction in natural porous and anisotropic materials, Proceedings of World Congress on Engineering WCE, London, Vol. I, 261-265, 37-39, Hung To Road, Hong Kong, IAENG International Association of Engineering, ISBN: 978-988- 18210-6-5, ISSN: 2078- 0958
• 14. Malujda I., Talaśka K., 2010, Modeling of yielding processes in porous and anisotropic natural materials, Machine Dynamics Research, 34, 4, 40-50
• 15. Mullner H.W., Mackenzie-Helnwein P., Eberhardsteiner J. ¨ , 2004, Constitutive modelling of biaxially stressed wood for the analysis of layered wooden shells, Proceedings of 3rd International Conference of the Europe Society for Wood Mechanics, 277-284
• 16. Nairn J.A., 2005, Numerical simulations of transverse compression and densification in wood, Material Science and Engineering, University of Utah, Salt Lake City, Utah
• 17. Sumelka W., Łodygowski T., 2013, Reduction of the number of material parameters by ANN approximation, Computational Mechanics, 52, 2, 287-300
• 18. Tsai S.W., Wu E.M., 1971, A general theory of strength for anisotropic materials, Journal of Composite Materials, 5, 58-80
• 19. Yang Q.X., 2001, Theoretical expressions of thermal conductivity of wood, Journal of Forestry Research, 12, I, 43-46

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniajacą naukę.