title: Ultrasonic characterization of a fluid layer using a broadband transducer.
abstract: A measurement method is proposed for the ultrasonic characterization of a fluid layer, corresponding to the resin transfer molding (RTM) manufacturing process. The ultrasonic velocity and attenuation of the silicone oil are measured in three samples having different viscosities. The measurement method is established on the basis of the attenuation of ultrasonic waves in fluids. A correction of the beam diffraction is implemented to improve measurement precision. A single element transducer with central frequency of 15 MHz is used. The tested fluids simulate the industrial resin used to manufacture composite materials. When injecting this resin, its viscosity increases until it reaches a critical state of polymerization. In this paper we focus on ultrasonic characterization of three fluids representing three intermediate cases of fluid resin during its injection before reaching the polymerization state.
authors.affiliation: Laboratoire Ondes et Milieux Complexes, LOMC FRE CNRS 3102, FANO FR CNRS 3110, Université du Havre, Place Robert Schuman, 76610 Le Havre, France. naim.samet@univ-lehavre.fr
authors.forename: Naïm
authors.initials: N
authors.lastname: Samet
authors.forename: Pierre
authors.initials: P
authors.lastname: Maréchal
authors.forename: Hugues
authors.initials: H
authors.lastname: Duflo
mesh_terms: D011108:Polymers; D012827:Silicone Oils; D014159:Transducers; D014465:Ultrasonics; D014783:Viscosity
chemical_list: D011108:Polymers; D012827:Silicone Oils