The acoustic property and impact behaviour of 3D printed structures filled with shear thickening fluids

In this study, the microstructures of the silica and styrene/acrylate particles and rheological behaviour of the three STFs were measured. The acoustic property and impact behaviour of 3D printed structures filled with STFs were investigated. The results showed that sound transmission loss (STL) of the structures filled with 46.5 vol% silica-based and 58.8 vol% styrene/acrylate-based STFs have been significantly improved, while their sound absorption coefficient (SAC) reduced greatly. The internal damage mechanism and energy absorption of honeycomb structures filled with different volume fraction STFs under low-velocity impact (LVI) loading were analysed, finding that the volume fractions and nanoparticles hardness of STFs has a significant influence on the impact resistance of the 3D printed honeycomb structures.

Automated summary

This study measured the microstructures of silica and styrene/acrylate particles as well as the rheological behavior of three different STFs, and investigated the acoustic property and impact behavior of 3D printed structures filled with these STFs. The results showed that the structures filled with specific STFs had improved sound transmission loss but reduced sound absorption coefficient. Additionally, the study analyzed the internal damage mechanism and energy absorption of honeycomb structures filled with varying volume fractions of STFs under low-velocity impact loading, finding significant influence of STF volume fractions and nanoparticles hardness on the impact resistance of the 3D printed honeycomb structures.