Papers by Author: Philippe Viot

Abstract: Mouthguard seems to be the best protection mean against dental injuries for sport application. The purpose of this study is to compare three different mouth guards under different condition of impacts closed to those observed on real-life shock loading. Specific devices were designed, firstly to pre-load and to form the mouthguard as it specified by the manufacturer; secondly to perform the different impacts on a very specific impact apparatus. Force and displacement were recorded as function of time. Those measurements were supplemented by a high speed video device to visualize the effect of the impact during the loading. A dissipated energy analysis was also performed.

Abstract: Syntactic foams are widely used in many impact-absorbing applications and can be employed as sandwich core. To improve their mechanical performances, these composite sandwich structures have to be modelled. This approach requires the characterisation of the foam behaviour. Moreover, the microstructure of the syntactic foam has an influence on its macroscopic behaviour; the foam density, the diameter of the porosities, their distribution in the material have to be taken into account.