Hydrostatic strength of hollow glass microspheres composites: influencing factors and modeling

Type Article
Date 2022-07
Language English
Author(s) Loubrieu Gauthier1, 3, Le Gall Maelenn1, Priour DanielORCID1, Stewart Gregg2, Melot Denis3, Le Gac Pierre YvesORCID1
Affiliation(s) 1 : Ifremer, Centre de Bretagne, Marine Structures Group, 1625 Route de Saint-Anne, 29280 Plouzané, France
2 : Balmoral Comtec Ltd. AB12 3GY Aberdeen, Scotland
3 : TotalEnergies, 92078 Paris, France
Source Composites Part C: Open Access (2666-6820) (Elsevier BV), 2022-07 , Vol. 8 , P. 100286 (8p.)
DOI 10.1016/j.jcomc.2022.100286
Keyword(s) Syntactic foam, Hollow glass microspheres, Hydrostatic compression, Hydrostatic strength, Material modelling

This study deals with the hydrostatic strength of hollow glass microspheres composites, commonly known as syntactic foams, using model materials made of 0.15 g/cm3 microspheres with 3 types of matrix, two epoxies and one paraffin. More than 100 model material samples are characterized for that work. The hydrostatic strength of these composite materials is determined in a pressure vessel, which can go up to 100 MPa. Two major parameters are studied: stiffness of the matrix and microsphere volume content within the composite material. The results clearly show that the hydrostatic strength of the syntactic foam can be improved by an increase in matrix stiffness or a reduction in microspheres content. Based on experimental data an empirical model with two parameters is proposed to describe the hydrostatic strength of syntactic foam. The relevance of the model is discussed.

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