Effect of nanomodified polyester resin on hybrid sandwich laminates

Mechanical Properties of Sandwich Composites Reinforced by Nanoclays: An Overview

“…Moreover, as shown in Figure 2, the neat sandwiches showed lower residual flexural strength for all impact energies, because the nanofillers increase the stiffness of the facesheets and, consequently, the panel overall bending stiffness. In 2014, Anbusagar et al [34] evaluated the effect of nanoclays modified polyester resin on flexural, impact, hardness and water absorption properties of jute and glass fabric hybrid sandwich laminates. For this purpose, contents of 2 wt%, 4 wt% and 6 wt% of nanoclays were used.…”

“…The maximum percentage of moisture absorption after 744 h of soaking decreased by 1.5 times the value obtained for neat composite laminates. This was explained due to impermeable fillers, like clay and glass fibers, which act as barriers and prevent the direct contact between jute and water [34].…”

“…They noticed that the flexural properties started to decrease after 4 wt% of nanoclays, therefore, only 0 wt% and 4 wt% of nanoclays were used to analyze the sandwich laminates. In this case, when 4 wt% of nanoclays were added to the FRP laminates, improvements of 40% and 57% were achieved in terms of bending In 2014, Anbusagar et al [34] evaluated the effect of nanoclays modified polyester resin on flexural, impact, hardness and water absorption properties of jute and glass fabric hybrid sandwich laminates. For this purpose, contents of 2 wt%, 4 wt% and 6 wt% of nanoclays were used.…”

“…More recently, in 2018, Anbusagar et al [38] carried out low velocity impact tests (using a weight-drop impact machine) on sandwich composites similar to those described in ref. [32] and [34]. The impact energy used in this study was 30 J and, as reported in [33], only neat sandwich composites and sandwich composites reinforced by 4 wt% of nanoclays were analyzed.…”

“…Finally, in 2019, Anbusagar et al [39] gave continuity to another study, where the effect of modified nanoclays on low velocity impact damage area and damage tolerance capability was analyzed using sandwich laminates similar to those described in ref. [34]. For this purpose, low velocity impact tests were performed with impact energies of 10 J and 20 J and compression after impact (CAI) tests were carried out in order to evaluate the residual compressive strength and residual compressive stiffness of the sandwich laminates.…”