Life Time Estimation of the Multilayer Plastic Pipes


Article Preview

In the contribution solution of special fracture mechanics problems connected with multi-layer plastic pipes was investigated. The assumptions of linear elastic fracture mechanics were accepted. A complex three-dimensional numerical model of multi-layer pipe system consisting of main (functional) pipe and protective layers has been suggested and numerically solved by finite element method. Two basic problems connected with lifetime expectation of multilayer pipe system have been considered and discussed, namely: question of fracture mechanics description of multilayered pipe system and corresponding measurements of the material properties. The suggested approach can help for more accurate estimation of the multilayer pipe damage.



Key Engineering Materials (Volumes 452-453)

Edited by:

Akihide Saimoto and Prof. Ferri M.H.Aliabadi




M. Zouhar et al., "Life Time Estimation of the Multilayer Plastic Pipes", Key Engineering Materials, Vols. 452-453, pp. 33-36, 2011

Online since:

November 2010




[1] B. Farshad: Polymer Testing Vol. 24 (2005), p.1041.

[2] A. Frank, W. Freimann, at al.: Engineering Fracture Mechanics Vol. 76 (2009), p.2780.

[3] Y. Murakami: Stress intensity factors handbook (Tokyo: Pergamon Press, 1987).

[4] L. Náhlik, L. Šestaková, P. Hutař, Computational Materials Science Vol. 46 (2009), p.614.

[5] P. Hutař, L. Náhlík, L. Šestaková, at al.: Composite Structures Vol. 92 (2010), p.1120.

[6] P.S. Leevers, J.C. Radon: International Journal of Fracture Vol. 19 (1982), p.311.

[7] P. Hutař, L. Šestaková, Z. Knésl at al.: Polymer Testing Vol. 28 (2009), p.785. Fig. 6. Biaxiality parameter as a function of the crack length for different temperatures.