Mechanical Behavior of Syntactic Foams for Deep Sea Thermally Insulated Pipeline


Article Preview

Ultra Deep offshore oil exploitation (down to 3000 meters depth) presents new challenges to offshore engineering and operating companies. Flow assurance and particularly the selection of insulation materials to be applied to pipe lines are of primary importance, and are the focus of much industry interest for deepwater applications. Polymeric and composite materials, particularly syntactic foams, are now widely used for this application, so the understanding of their behavior under extreme conditions is essential. These materials, applied as a thick coating (up to 10-15 cm), are subjected in service to: - high hydrostatic compression (up to 30 MPa) - severe thermal gradients (from 4°C at the outer surface to 150°C at the inner wall), and to high bending and shear stresses during installation. Damageable behavior of syntactic foam under service conditions has been observed previously [1] and may strongly affect the long term reliability of the system (loss of thermal properties).This study is a part of a larger project aiming to model the in-service behavior of these structures. For this purpose it is important to identify the constituent mechanical properties correctly [2, 3]. A series of tests has been developed to address this point, which includes: - hydrostatic compression - shear loading using a modified Arcan fixture This paper will describe the different test methods and present results obtained for different types of syntactic foams.



Edited by:

R.A.W. Mines and J.M. Dulieu-Barton






D. Choqueuse et al., "Mechanical Behavior of Syntactic Foams for Deep Sea Thermally Insulated Pipeline", Applied Mechanics and Materials, Vols. 24-25, pp. 97-102, 2010

Online since:

June 2010


[1] F. Grosjean, N. Bouchonneau, D. Choqueuse, V. Sauvant-Moynot Comprehensive analyses of syntactic foam behaviour in deep water environment, J Mater Sci (2009) 44: 1462-1468.

DOI: 10.1007/s10853-008-3166-0

[2] D. Choqueuse, et al, Recent progress in analysis and Testing of insulation and buoyancy materials, Composite Materials and Structure for offshore application CMOO-4, (2004).

[3] D. Choqueuse, et al, Modeling approach for damageable mechanical behaviour of glass/polymer syntactic foams, Syntactic and Composite Foams II, (2007).

[4] N. Gupta, Kishore, E. Woldesenbet, S. Sankaran, et al, Studies on compressive failure features in syntactic foam material, J Mater Sci (2001) 36: 4485-4491.

[5] M. Koopman, K.K. Chawla, B. Carlisle, Microstructural failure modes in three-phase glass syntactic foams, J Mater Sci (2006) 41: 4009-4014.

DOI: 10.1007/s10853-006-7601-9

[6] J. Adrien, E. Maire, N. Gimenez, V. Sauvant-Moynot, Experimental study of the compression behaviour of syntactic foams by in situ X-ray tomography, Acta Materialia 55 (2007) 16671679.

DOI: 10.1016/j.actamat.2006.10.027

[7] UNESCO, 1983, Algorithms for computation of fundamental properties of seawater, Unesco technical papers in marine science.

[8] M. Arcan , Z. Hashin, A. Voloshin "A method to produce uniform plane-stress states with application to fiber-reinforced materials. Experimental mechanics 18 (1978): 141-146.

DOI: 10.1007/bf02324146

[9] P. Davies , L. Sohier b, J. -Y. Cognard, A. Bourmaud, D. Choqueuse, E. Rinnert, R. Créac'hcadec, Influence of adhesive bond line thickness on joint strength, International Journal of Adhesion & Adhesives 29 (2009) 724-736.

DOI: 10.1016/j.ijadhadh.2009.03.002

[10] Cartié D, Davies P, Peleau M, Partridge I, the influence of hydrostatic pressure on the interlaminar fracture toughness of carbon/epoxy composites, Composites Part B: Engineering Volume 37, Issues 4-5 , (2006), Pages 292-300.

DOI: 10.1016/j.compositesb.2005.12.002

In order to see related information, you need to Login.