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Abstract

The processability of the composites made up of wood and a matrix of thermoplastic materials was experimentally and numerically investigated for six different proportions of wood flours. To take account of the enclosed gas volume responsible for inflation of the thermoplastic composite membrane, which contributes significantly to the strength and stiffness of a thermoplastic composite structure, we considered a thermodynamical approach to express external work in terms of a closed volume. The pressure load is thus deduced from the thermodynamic law of the Redlich-Kwong real gas. The viscoelastic behavior of the Lodge model is considered. The Lagrangian formulation together with the assumption of the membrane theory is used in the finite element implementation. Moreover, the air flow influence on the inflation of bubble is analyzed for six different proportions of wood flours in the HDPE material.

Keywords

HDPE composite wood flours viscoelastic finite element inflation.

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Bengtsson, M. , Gatenholm, P. and Oksman, K. (2005). The Effect of Crosslinking on the Properties of Polyethylene/wood Flour Composites, Composites Science and Technology, 65: 1468-1479.

Herrera-Franco, P.J. and Valadez-Gonzalez , A. (2005). A Study of the Mechanical Properties of Short Natural-fiber Reinforced Composites , Composites Part B: Engineering, 36: 597-608.

Balasuriya, P.W. , Ye, L. and Mai, Y.-W. (2001). Mechanical Properties of Wood Flake-polyethylene Composites. Part I: Effects of Processing Methods and Matrix Melt Flow Behaviour, Composites Part A: Applied Science and Manufacturing, 32: 619-629.

Kumar, R.P. , Amma, M.L.G. and Thomas, S. (1995). Short Sisal Fiber Reinforced Styrene-butadiene Rubber Composites, J. Applied Polymer Science, 58: 597-612.

Lu, M. (1997). Wood Fiber Reinforced Polypropylene Composites , Ph.D. Thesis, Dept. Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana (USA).

Bledski, A.K. , Letman, M. , Viksne, A. and Rence, L. (2005). A Comparison of Compounding Processes and Wood Type for Wood Fibre-PP Composites. Composites Part A: Applied Science and Manufacturing, 36: 789-797.

Saheb, D.N. and Jog, J.P. (1999). Natural Fiber Polymer Composites: A Review, Adv. in Polymer Tech, 18: 351-363.

Erchiqui, F. , Gakwaya, A. and Rachik, M. (2005). A Dynamic Finite Element Analysis of Nonlinear Isotropic Hyperelastic and Viscoelastic Materials for Thermoforming Applications , Polymer Engineering & Science, 45: 125-134.

Erchiqui, F. (2006). A New Hybrid Approach Using the Explicit Dynamic Finite Element Method and Thermodynamic Law for the Analysis of the Thermoforming and Blow Molding Process of Polymer Materials. Polymer Engineering and Science, 46(11): 233-244.

10.

Redlich, O. and Kwong, J.N.S. (1949). On the Thermodynamics of Solution, V-An Equation of State, Chem. Rev., 44: 233-244.

11.

Zienkiewicz, O.C. and Taylor, R.L. (1991). The Finite Element Method, 4th edn, McGraw-Hill , New York, Vol. 1-2.

12.

Lodge, A.S. (1964). Elastic Liquids, Academic Press , London.

13.

Ferry, J.D. (1980). Viscoelastic Properties of Polymers, John Wiley & Sons, New York.

14.

Papanastasiou, A.C. , Scriven, L.E. and Macosko, C.W. (1983). Journal of Rheology , 27(4): 387.

15.

Dokainish, M.A. and Subbaraj, K. (1989). A Survey of Direct Time-integration Methods in Computational Structural Dynamics, Comput. Struct. , 32(6): 1371-1386.

16.

Verron, E. , Marckmann, G. and Peseux, B. (2001). Dynamic inflation of non-linear elastic and viscoelastic rubber-like membranes, International Journal for Numerical Methods in Engineering, 50(5): 1233-1251.

Investigation of Relaxation Properties and Potentiality of the Thermoformability of HDPE Charged by Wood Flours

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