The Impact Compression Behaviors of Silica Nanoparticles—Epoxy Composites

Abstract

The compressive properties of epoxy with different silica nanoparticles (SiO2 nanoparticles) contents at quasi-static and high strain rates loading were investigated via experiment. This article evaluates the compressive failure behaviors and modes at different SiO2 nanoparticles contents and different strain rates. The results indicated that the stress strain curves were sensitive to strain rate, and the compressive failure stress of composites with various SiO2 nanoparticles contents increased with the strain rates, and it increased along with SiO2 nanoparticles contents and then declined. The compressive failure stress and the compressive failure modes of the composites were apparently different from the change of SiO2 nanoparticles contents.

Effect of sulfuric acid solution on thermal conductivity and impact strength of epoxy resin reinforced by silicon dioxide powder

“…This is due to the fact that the silicon dioxide added to the base material is a glass material with low resistance to Impact. The reinforcement particles form points to concentrate the stresses and centers of the dot defects which will increase the probability of spreading the cracks quickly as they are within the main polymer bonds and thus reduce the durability of the composite material and thus reduce the Impact [17,18]. Showing from Fig.6 we found that the amount of Impact strength it increase after immersion in sulfuric acid, The reason for increasing Impact strength after acid immersion is due to reduce the elasticity of the composites because of increasing the crosslinking by interaction of acid with polymer back bounds this prevent cracks propagation and increase of the value of Impact strength.…”

Filler shape and volume fraction effect on dynamic compression behaviour of glass filler reinforced epoxy composites

“…While the elastic modulus and yield strength was observed to increases with addition of CNTs room temperature and at 77 K; the effect was more pronounced at 77 K. Multi-scale analysis in combination with finite element simulations and analytical molecular structural mechanics predicted well the values of elastic modulus as that obtained from the experiments. Ma et al (2015) studied both quasi-static and dynamic compression behaviour of silica nanoparticles (20-50 nm in diameter) filled epoxy composites prepared with up to 15% filler volume fraction. It was observed that the failure stress decreased beyond 10% filler volume fraction however the increasing silica content increased the energy absorption capacity of composite with lesser craze formation under dynamic loading conditions.…”

Effects of mixed micro and nano silica particles on the dynamic compressive performances of epoxy adhesive

“…Ma et al [18] investigated the influence of pure nano silica particle on the dynamic stiffness of epoxy. They have reported that the dynamic stiffness increased with the weight fraction of silica particles.…”

“…The weight fraction, size, and distribution of silica particles affect the epoxy dynamic stiffness. Reducing silica particles size into nanoscale increases the epoxy dynamic stiffness [13,[18][19][20]. In contrast, the molecular mobility increases with the temperature and reduces the dynamic stiffness [16].…”

“…High strain rate loading and silica particles restrict the molecular mobility of the epoxy matrix and result in a stiffer dynamic response [13][14][15][16][17][18]. The weight fraction, size, and distribution of silica particles affect the epoxy dynamic stiffness.…”