Document Type : Original Article


1 Department of mechanical engineering, Babol university of technology , Babol

2 composite material and technology center, Tehran


 While the composite pipes and cylinders manufacture by filament wound system, there are a lot of parameters that influence on the strength and mechanical behavior of them. This various mechanical behavior causes various buckling behavior. One of the most important parameters is winding pattern that have effects on critical buckling loads. So this parameter should be controlled since it effects on mechanical behavior of pipes and cylinders. In the present work the influence of winding patterns on the critical buckling load of filament wound pipes exposed by pure axial loading have been studied. The studied specimens are Glass/Epoxy tubes with [+55,-55]6 lay-up(diameter to thickness ratio d/t of 10 and length of 280mm). Parameters were all considered to be consistent to investigate the effects of winding patterns there is just difference in winding pattern between three the experimental specimens. The lay-up is the result of classical theories. Love model and Galerkin’s method were used to provide buckling equations and solve theoretically the resulted equation respectively. Although the results illustrate that there is a difference, about 2-4 percent, in terms of critical buckling load between disparate winding patterns, 16 unit cells winding pattern bears higher buckling load than other patterns. Also the results show that no evident patterns influence on buckling modes of pipes. Later, the maximum lateral buckling loads of the patterns are verified with experimental data.


Main Subjects

1- Mertiny P, Ellyin F. Selection of optimal processing parameters in filament winding. In: Proceedings of 33rd International SAMPE Technical Conference. Seattle; November 2001. p. 1084–95.
2- Cohen D. Influence of filament winding parameters on composite vessel quality and strength. Composites Part A 1997;28A: 1035–47.
3- Mertiny P, Ellyin F. Influence of the filament winding tension on physical and mechanical properties of reinforced composites. Composites, Composites: Part A 33 (2002) 1615–1622.
4- H. Hernández-Morenoa, B. Douchin, F. Collombet, D. Choqueuse and P. Davies. Influence of winding pattern on the mechanical behavior of filament wound composite cylinders under external pressure. Composites Science and Technology. March 2008, volume 68, issue 3-4.
5- A.Gharib, M. Shakeri. Stacking sequence optimization of laminated cylindrical shells for buckling and free vibration using genetic algorithm and neural networks. second International Conference on Engineering Optimization. September 6 - 9, 2010, Lisbon, Portugal.
6- J. Rousseau, D. Perreux, N. Verdiere, The influence of winding patterns on the damage behavior of filament-wound pipes, Composites Science and Technology 59 (1999) 1439±1449, 1998.