Effect of hybrid fillers of <scp>Mg–Al</scp> layered double hydroxide and nanoclay on the mechanical behavior and formability of glass laminate <scp>AA5052</scp>‐reinforced epoxy composites

In this study, ternary layered double hydroxide (LDH) containing Zn, Cu, and Ni was synthesized successfully using hydrolysis route. Upon calcination at a lower temperature of 350 C, the synthesized lattice transformed into ZnO containing Cu and Ni that can be reformed back to the layered structure simply by a phenomenon known as 'memory effect'. Furthermore, the synthesized lattice was used for the formation of polyaniline (PANI)-based composite material. The structural and morphological details of the as-prepared samples were studied using various spectroscopic techniques, that is, powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR), thermo gravimetric analysis (TGA), and scanning electron microscopyenergy dispersive X-ray analysis (SEM-EDX), indicating the formation of singlephase ternary LDH as well as the successful incorporation of PANI in the interlayer region. Owing to the combined advantages of LDH and conducting polymer (PANI), zinc copper nickel layered double hydroxide (ZnCuNi-LDH)/PANI composite may be exploited as a potential candidate for a variety of applications in the future.

Synthesis and characterization of ternary layered double hydroxide containing zinc/copper/nickel and its PANI composite

Pathak

Singh

2022

Comprehensive characterization of AA 2024T3 fiber metal laminate with nanosilica‐reinforced epoxy based polymeric composite panel for lightweight applications

Vijayan¹,

Selladurai²,

Balaganesan

et al. 2022

Fiber metal laminates (FMLs) are a hybrid composite material used in aircraft structural parts. They are fabricated by stacking thin aluminum sheets with a fiber-reinforced polymer composite. In this research work, nanosilica was mixed with epoxy resin in different weight percentages such as 0, 1, 3, 5, and 7 wt% for the preparation of FML. Nanosilica was used as a secondary reinforcement in the epoxy resin to improve the interfacial bonding and mechanical strength of the FML. The morphology and chemical compositions of the cured nanosilicadispersed epoxy resin and aluminum were examined using Fourier transform infrared spectroscopy, X-ray diffraction, field-emission scanning electron microscope, and energy-dispersive X-ray analysis. Thermogravimetric analysis was used to investigate the thermal stability of epoxy before and after the addition of nanosilica. FML was prepared using the hand layup and compression molding processes by sandwiching thin aluminum alloy sheet and E-glass fiber. The FML specimens were cut using an abrasive water jet machine as per ASTM standards for determining their mechanical characteristics such as tensile strength, flexural strength, and short-beam strength. Vibrational analysis was undertaken, and the natural frequency and damping factor for the FML specimens were determined.The results revealed that the tensile strength of pure FML was increased by 7% for 3 wt% nanosilica-dispersed FML. Flexural and interlaminar shear strength was increased by 30.5% and 10.9%, respectively for the 1 wt% nanosilica-dispersed FML was compared to pure FML.

Quasi‐static compression behavior and crashworthiness of GLARE laminate conical frustum with progressive circular and square cut‐outs

Logesh

Hariharasakthisudhan²,

Bright

et al. 2023

Self Cite

The design of structures using advanced composite materials such as fiber metal laminate requires an in-depth understanding of their deformation behavior and response to the discontinuities in the structures. In the present study, a GLARE kind of fiber metal laminate in 2/1 configuration was fabricated in the form of conical frustum. Three cut-outs of two different shapes such as circular and square were intentionally made at the center of the frustum at an angular distance of 120 . The quasi-static compression test was conducted to determine the crashworthiness characteristics of laminate frustums with cut-out and the results were compared with perfect frustum. The study showed that the laminate with cut-out undergone for inward buckling near the discontinuities. Apart from that, the delamination and outward buckling were noted in the edges of the cut-outs. The energy absorption of laminate frustum with circular cut-outs was observed to be better than square cut-outs. The performance of laminate frustums with cut-outs was ranked using Technique for Order Preference by Similarity to an Ideal Solution technique. A finite element analysis was carried out to simulate the deformation behavior of laminate frustum with cut-outs and the numerical results of deformation mode closely represented the experimental results.