The silica nanoparticle: (a) 0.1 and (b) 1 .four. Conclusions Several experiments were performed to study the impact of strain rate and filler content material on the compressive behavior of many epoxy-based nanocomposites. The aeronautical grade RTM6 epoxy was filled with silica nanoparticles of sizes 300 nm and 880 nm and distinctive surface functionalization circumstances. 3 weight percentages had been thought of for the fillers: 0.1 , 1 and five (5 wt. only for non-functionalized particles). Quasi-static and higher strain rate compression experiments were performed using a universal testing machine as well as a SHPB setup, respectively, to cover a strain price variety from 0.001 s-1 up to 1100 s-1 . Local displacements and strains within the sample have been measured making use of the 3D digital image correlation technique. The effect of your strain rate, the size as well as the weight percentage on the silica nanoparticles on the elastic modulus, the Poisson’s ratio plus the correct peak yield strength of your tested components have been discussed. Taking into consideration the tested supplies, manufacturing approaches utilized, testing gear and outcomes, the following is often concluded: 1. The tested RTM6 neat and nanoparticle filled resins have been all strain rate-sensitive in compression. All components showed a rise in strength with growing strain prices for all of the weight percentages and sizes of the fillers. The elastic modulus and Poisson’s ratio of the tested epoxy DDD85646 site nanocomposites have been independent from the strain rate and showed a practically BMY 7378 Biological Activity constant behavior at various strain prices for all weight percentages and sizes of your particles. On the other hand, the accurate peak yield strength showed a rise with growing strain prices for all weight percentages and sizes of your particles utilised. The addition of silica nanoparticles for the RTM6 epoxy resin normally enhanced both its elastic modulus and its peak yield strength at distinctive strain prices for each of the weight percentages of the particles. Increasing the weight percentage of each forms the silica nanoparticles from 0.1 to 5 didn’t yield any improvement within the elastic modulus along with the Poisson’s ratio but led to a slight enhance in the peak yield strength. Furthermore, it was discovered that the improvement within the peak yield strength as a result of addition of silica nanoparticles was additional prominent in the quasi-static strain price regime when compared with the high strain price regime. The dynamic mechanical evaluation showed an increase in the storage modulus along with a marginal improve in the glass transition temperature from the resin by the addition of silica nanoparticles of distinctive weight percentages. The sizes of your silica nanoparticles made use of (300 nm and 880 nm) didn’t drastically influence the compressive properties of the RTM6 epoxy resin, regardless of the weight percentages from the particles.2.three.four.five.Polymers 2021, 13,18 ofAuthor Contributions: Conceptualization, A.E., A.Z., M.Z., A.B. and P.V.; methodology, A.E., A.Z. and P.V.; formal analysis, A.E. and a.Z.; investigation, A.E., A.Z. and S.Z.; data curation, A.E. plus a.Z.; writing–original draft preparation, A.E. and a.Z.; writing–review and editing, M.Z., A.B. and P.V.; visualization, A.E. and a.Z.; supervision, A.B., M.Z. and P.V.; funding acquisition, A.B. and P.V. All authors have read and agreed towards the published version of the manuscript. Funding: The project “EXTREME” leading to this publication has received funding from the European Union’s Horizon 2020 investigation and innovation program beneath grant agreement.