ABSTRACT
The improvement of knowledge about extrusion resistance of rubber seal under high pressure is necessary to manage the risks of sealing performance in harsh conditions. In this paper, Cetim and LRCCP present their new investigations to understand extrusion failure under high hydrostatic pressure, on two references 21B6 (NBR) and 61D6 (FVMQ). Some complementary tests were performed on the rubber to understand Force-displacement evolutions and the damages that occurred such as tear test, uniaxial tension and compression, pure shear and hydrostatic compression. A complete material database at viscoelastic equilibrium was established and the mechanical parameters for different hyperelastic models were identified. Finally, a first numerical model was implemented in Abaqus® to study the mechanical behaviour of rubbers integrating force levels and extrusion gaps. Different factors were studied such as friction coefficient, the radius of experimental tools, meshes, and elements.
