Effect of multi‐walled carbon nano‐tube on mechanical behavior of glass laminate aluminum reinforced epoxy composites

Abstract

This research work is focused on development of epoxy based fiber metal laminate (FML) that comprised of multi-walled carbon nano-tube (MWCNT), glass fiber, and aluminum metal sheet. The hand layup technique was employed to fabricate the sandwich FML with different weight percentages (3, 4, and 5 wt%.) of MWCNT. The mechanical properties of the developed FMLs were determined through tensile, flexural, lap shear, and hardness tests following ASTM and IS standards. The scanning electron microscope (SEM) was used to characterize the failure mechanism of composites. The FML with MWCNT offered superior tensile and shear properties up to the addition of 4 wt%. The MWCNTs were found to be agglomerated in the epoxy when added more than 4 wt%. The FML's showed larger deformation before complete failure in shear mode with respect to the addition of MWCNTs. However, there was no considerable improvement recorded in the flexural and impact behavior of the FML composition. The addition of MWCNT fillers in the epoxy turned it more brittle and exhibited comparatively less deformation before failure in flexural mode.

Evaluation of mechanical properties of novel GLARE laminates filled with nanoclay

“…Few spots of fiber pullout were noted in the core layer of FML as shown in Figure 10(F), which might have reduced the transfer of load and resulted in the decrement of UTS. The UTS, YS, elongation and strength coefficient (K) of the FML with nanoclay were noted to be greater than the FML with MWCNT [24] and LDH [25] reported in previous studies.…”

“…Figure 11 showed that the FML with 3 wt% of nanoclay offered higher resistance to the flexural load. The FML with 3 and 4 wt% of nanoclay exhibited superior flexural resistance than the FML with MWCNT [24] and LDH. [25] The flexural strength (σ fl ), flexural modulus (E fl ) and flexural stiffness (K fl ) of the composites were calculated using the following equations [22] :…”

“…The layers such as metal skin, fibers, and nanoclay-filled epoxy were clearly distinguished in Figure 4(A)-(C). In Figure 4(A), the magnified SEM image shows the better adhesion of fibers onto the T A B L E 1 Chemical composition of AA5052-H32 [24] Elements T A B L E 3 Properties of E-glass fabric [24] Properties of E-glass fiber Values…”

“…The plasticity of glass fiber reinforced composite layer was assumed to be fully elastic under tensile loading condition up to the failure. [23] The results of FMLs with nanoclay filler were compared to the results of the FML with MWCNT [24] and LDH [25] filler in previous studies conducted by the authors. While comparing the stress-strain curves, it was understood that the FML with 5 wt% of nanoclay filler in 0 orientation to the rolling direction exhibited maximum resistance to the tensile load as it showed maximum UTS, but the value was slightly greater to the laminate with 3 wt% nanoclay.…”

Experimental investigation of quasi-static behavior of composite and fiber metal laminate panels modified by graphene nanoplatelets

“…19 The effect of using nanofillermodified matrix in manufacturing of FMLs has been investigated by many researchers. [19][20][21][22][23][24][25][26][27] Megahed et al 20 studied the mechanical properties of GLARE by adding several types of nanofillers such as aluminum (Al), copper (Cu), titanium oxide (TiO 2 ), silica (SiO 2 ), aluminum oxide (Al 2 O 3 ), and nano clay (NC). They reported that adding SiO 2 nanoparticles into the composite laminates of GLARE caused a maximum improvement of 39%, 33.2%, and 108.4% in tensile strength, modulus, and toughness respectively, as compared to the unreinforced GLARE.…”