Mechanical behavior of carbon nanotubes-based polymer composites under impact tests

Abstract

This study was focused on the effect of carbon nanotubes on the impact resistance and damage evolution in laminate carbon nanotubes/epoxy composites under an impact loading. The composite panels were made from carbon fibers and carbon nanotubes randomly distributed into epoxy resin. The amount of carbon nanotubes dispersion was varied up to 4% by weight. Taylor impact tests were carried out to obtain the impact response of specimens with dimensions of 70×70×4 mm3. A projectile manufactured from a high strength and hardened steel with a diameter of 20 mm and 1.5 kg of mass was launched by a compressed gas gun within the velocity of 3 m/s, 7 m/s and 12 m/s. For the experimental test, three velocity levels were used: 3 m/s for the elastic deformation, 7 m/s for the penetration of the impactor and 12 m/s for the perforation of panels. Deformation histories and damage modes in specimens were recorded during the impact test using a high-speed camera. Processing of carbon nanotubes dispersed in laminates, testing, damage, and key findings is reported. It is observed that the impact resistance of laminates reinforced with a random distribution of carbon nanotubes increases up to 15.6% at high-strain rate compared with that of 0% of carbon nanotubes. It is also observed that the resistance to damage initiation and evolution increases with the addition of carbon nanotubes concentration.

Study of mechanical performance of polymer nanocomposites reinforced with exfoliated graphite of different mesh sizes using micro-indentation

“…Moreover, the platy shape of exfoliated Graphite, which increases aspect ratio and increases surface area contributes to obtaining a sheet that cannot be easily cracked with a small extent of bending or tensile force. These results suggest that a significant ExG dimension will limit and absorb the shock effect and transfer that save the matrix against failure [27] [35]. the larger size of ExG.…”

“…These results suggest that a significant ExG dimension will limit and absorb the shock effect and transfer that save the matrix against failure. 27,35…”

Effects of midplane carbon nanotube sheet interleave on the strength and impact damage resistance of carbon fiber reinforced polymer composites

“…These are either utilization of CNTs as a stand-alone reinforcement material or using them in conjunction with other reinforcement material such as carbon fiber. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Cheng et al [7] fabricated 2-ply laminates with horizontally aligned CNT sheets via resin transfer molding. While significantly high mechanical strength and electrical conductivity of the CNT based laminates were achieved, attempts to fabricate laminates with higher volume fraction of CNTs failed due to poor epoxy permeation.…”

The effect of thickness on themultiwalledcarbon nanotubes performance in glass/epoxy composite laminates under dynamic loading

“…However, using a combination of nanoclay and MWCNT has a significant improvement. Moumen et al [ 21 ] examined CNTs/epoxy composite laminates under low‐velocity impact ranging from 3 to 12 m/s to observe the impact resistance and damage. The results showed that adding CNT could increase the impact resistance of laminates up to 15.6% at high‐strain rate loading compared with the neat epoxy.…”