Response of perforated composite tubes subjected to axial compressive loading

Abstract Perforated and slotted tubes are widely used as liners in oil and gas industry to facilitate the collection of products from reservoirs, and prevent sand migration to wellbore, which in return could cause product contamination and affect functionality of the pumps. The objective of this research is to establish the critical axial load of perforated E-glass/epoxy tubes using numerical and experimental methods. Firstly, in an experimental attempt, a total of six sets of composite tubes (three sets with perforations and three sets of intact (non perforated) tubes), having two different thicknesses and diameters, were fabricated and tested under axial compression. The reduction in the critical load and axial stiffness of the composite tubes was investigated experimentally. Secondly, a comprehensive numerical investigation was carried out, using the finite element method (FEM), to simulate the instability response of the intact and perforated composite tubes under compressive axial loading. The effect of various parameters such as the tube diameter, size, number of perforation and wall thickness were investigated in the current research. Good correlation is obtained between the experimental and numerical results. According to the results, the intact and perforated tubes showed similar instability mode shapes under the axial loading. However, the critical load and global stiffness of the perforated tubes were considerably reduced.

[1]  Panagiotis D. Kaklis,et al.  Numerical modeling of composite laminated cylinders in compression using a novel imperfections modeling method , 2001 .

[2]  Michael J. Pappas,et al.  Optimal laminated composite shells for buckling and vibration , 1983 .

[3]  J. Onoda,et al.  Optimal laminate configurations of cylindrical shells for axial buckling , 1985 .

[4]  W. T. Koiter,et al.  Buckling of an axially compressed imperfect cylindrical shell of variable thickness , 1994 .

[6]  A. A. Smerdov,et al.  A computational study in optimum formulations of optimization problems on laminated cylindrical shells for buckling II. Shells under external pressure , 2000 .

[7]  Mark W. Hilburger,et al.  Effects of Imperfections on the Buckling Response of Compression-Loaded Composite Shells , 2000 .

[8]  Colin Bailey,et al.  Instability of imperfect composite cylindrical shells under combined loading , 2007 .

[9]  P. Seide,et al.  Buckling of thin-walled circular cylinders , 1968 .

[10]  A. Khatibi,et al.  An experimental investigation into the buckling of GFRP stiffened shells under axial loading , 2009 .

[11]  G. Sun,et al.  A practical approach to optimal design of laminated cylindrical shells for buckling , 1989 .

[12]  Ashkan Vaziri,et al.  On the buckling of cracked composite cylindrical shells under axial compression , 2007 .

[13]  Mark W. Hilburger,et al.  Effects of imperfections of the buckling response of composite shells , 2004 .

[14]  Influence of In-Plane Shear Nonlinearity on Buckling and Postbuckling Responses of Composite Plates and Shells , 1991 .

[15]  C. Hong,et al.  Buckling behavior of laminated composite cylindrical panels under axial compression , 1988 .

[16]  J. H. Starnes,et al.  Postbuckling Behavior of Axially Compressed Graphite-Epoxy Cylindrical Panels With Circular Holes , 1985 .

[17]  Azam Tafreshi,et al.  Efficient modelling of delamination buckling in composite cylindrical shells under axial compression , 2004 .

[18]  Suresh P. Pai,et al.  Structural design criteria for filament-wound composite shells , 1994 .