Numerical models of polymeric composite to simulate fatigue and ageing processes

• Autorzy: Wróbel G. , Kaczmarczyk J. , Stabik J. , Rojek M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: of this paper was to prove the possibility of applying numeric model of polymer composite, consisting of finite elements, to simulate dynamic acoustic and thermal processes. Characteristics of these processes evaluated numerically, in comparison with experimental results, could allow to simulate complex structural processes taking place during fatigue and ageing degradation of composite. It is expected to prove relations between chosen physical properties of simulated processes and strength characteristics determining load capacity of materials. Design/methodology/approach: Planar, biphase model of fibre reinforced laminate was applied. Pseudo-random procedure of model structure and physical parameters modification was used. A programme of numerical simulations was performed to evaluate sensitivity of characteristics of acoustic wave propagation and heat transport processes on model modifications. Findings: Possibility of model structural and parametric modifications resulting in changes of composite physical properties, such as stiffness, acoustic wave propagation velocity and thermal conductivity, observed during degradation processes was demonstrated. Research limitations/implications: It is expected that results of composite testing programme, being now realized by authors, will allow quantitative adjustment of acoustic and thermal characteristics achieved numerically and experimentally. Practical implications: Complete identification of numerical model characteristics and procedure of its modification is expected to allow to estimate the degree of strength properties degradation on the basis of numerical simulations results. Originality/value: Proposed numerical models for simulation of composite degradation due to fatigue and ageing processes are new and original tools supporting non-destructive evaluation of strength properties changes.

Słowa kluczowe

EN

composite; numerical model; non-destructive testing; degradation

PL

kompozyt; model numeryczny; badania nieniszczące; degradacja

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 34, nr 1
• Strony: 31--38
• Opis fizyczny: Bibliogr. 16 poz., rys., tabl.

Twórcy

autor

Wróbel G.

autor

Kaczmarczyk J.

autor

Stabik J.

autor

Rojek M.

• Division of Metal and Polymer Materials Processing, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

Bibliografia

• [1] A. Śliwiński, Physics for industry. Ultrasounds and their application, WNT, Warsaw, 2001 (in Polish).
• [2] G. Wróbel, Structural polymers and composites, Monography of Silesian University of Technology Publications, Gliwice, 2008 (in Polish).
• [3] P. Kudela, W. Ostachowicz, Modelling of wave propagation in composite plates, Engineering Modelling 32 (2006) 323-330 (in Polish).
• [4] A. T. Patera, A Spectral Element Method for Fluid Dynamics: Laminar Flow in a Channel Expansion, Journal of Computational Physics 54 (1984) 468-488.
• [5] W. Ostachowicz, T. Wandowski, P. Malinowski, Elastic Wave Phased Array for Damage Localisation, Journal of Theoretical and Applied Mechanics 46 (2008) 917-931.
• [6] M. S. Kozień, Hybrid Method of Evaluation of Sounds Radiated by Vibrating Surface Elements, Journal of Theoretical and Applied Mechanics 43 (2005) 119-133.
• [7] J. Grabowska, Elastic waves propagation in one-dimensional model of structural elements with discontinuities, PhD. Thesis, Gdańsk, 2006, (in Polish).
• [8] J. P. Boyd, Chebyshev and Fourier Spectral Methods, Mineola, New York, 2000.
• [9] K. J. Bathe, Finite Element Procedures. Printice Hall, Englewood Cliffs, New Jersey, 2000.
• [10] O. C. Zienkiewicz, Finite elements method, Arkady, Warsaw, 1972 (in Polish).
• [11] G. Wróbel, Non-destructive diagnostic method of the strength degradation state of chosen composite materials, Proceedings of Polish Ministry of Science Project No 7 T08E 007 19, Gliwice, 2003. (in Polish).
• [12] G. Wróbel, Non-destructive method of the strength degradation state diagnosis, Silesian University of Technology Publications, Gliwice, 2008 (in Polish).
• [13] G. Wróbel, J. Stabik, M. Rojek, Non-destructive diagnostic methods of polymer matrix composites degradation, Journal of Achievements in Materials and Manufacturing Engineering 31/1 (2008) 53-59.
• [14] G. Muzia, Z.M. Rdzawski, M. Rojek, J. Stabik, G. Wróbel, Thermographic diagnosis of fatigue degradation of epoxy-glass composites, Journal of Achievements in Materials and Manufacturing Engineering 24/2 (2007) 123-126.
• [15] G. Wróbel, G. Muzia, Z.M. Rdzawski, M. Rojek, J. Stabik, Thermographic diagnosis of fatigue degradation of epoxy-glass composites, Journal of Achievements in Materials and Manufacturing Engineering 24/1 (2007) 131-136.
• [16] J. Kaczmarczyk, G. Wróbel, J. Stabik, M. Rojek, A model of heat transfer in composites subjected to thermographic testing, Archives of Materials Science and Engineering 31/2 (2008) 105-108.