108 - APPLYING THE CARBON NANOFILLERS WITH DIFFERENT DIMENSIONALITIES TO IMPROVE THE POST-IMPACT COMPRESSIVE FATIGUE RESISTANCE OF CARBON FIBER REINFORCED EPOXY COMPOSITES (CompTest 2025)
The effect of dispersing multiwalled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) in the matrix on the post-impact compressive monotonic and fatigue strengths of carbon fiber reinforced epoxy composites has been experimentally studied in the study. The composite specimens with the matrix reinforced by different nanoparticle concentrations of two employed carbon nanoparticles, i.e., 0, 0.1, 0.3, and 0.5 wt.% were prepared to study the effect of nanoparticle content on the impact resistance and post-impact compressive monotonic and fatigue damage tolerance. The impact tests were performed using a drop-weight impact tester at the impact energy of 60 J. The damage area of the specimens was determined by image processing the infrared thermal image. Experimental results show that the optimum contents of the employed nanoparticles for the impact resistance, such as impact force, damage area, indentation depth, are 0.5 and 0.1 wt.% for the MWCNTs and GNPs, respectively. Furthermore, the composite specimens with 0.5 wt.% MWCNTs and 0.1 wt.% GNPs have higher post-impact compressive strengths compared to the ones with other concentrations of nanoparticles.
Date
21.05.2025.
Keywords
Carbon nanofiller, Carbon fiber reinforced epoxy composite, Post-Impact compressive fatigue strength, Damage area growth rate
