Effect of Cut-outs on the Free Vibration Response of Basalt/Carbon Hybrid Composites

Abstract

The current work deals with an experimental investigation about the influence of cut-outs on dynamic characteristics of basalt/carbon hybrid fiber reinforced composite laminates. The composite samples have been fabricated via vacuum assisted resin transfer molding technique and cut-outs in the form of triangular, square and circular shapes with equal areas have been processed on them to systematically analyze the influences of cut-outs. The dynamic characteristics of the samples have been examined by conducting free vibration-damping tests and expressed in terms of natural frequency and damping ratio using the frequency response and time-acceleration response. The results show that the damping characteristics of the composite samples can be remarkably improved with the help of cut-outs which provide improvements approximately between 2.41% and 16.65% in damping ratio values. The maximum and minimum variations in damping ratio have observed for non-hybrid carbon fiber reinforced composite samples with triangular cut-out (T-C6) and hybrid basalt/carbon fiber reinforced composite samples with circular cut-out (C-B6), respectively. On the other hand, the presence of cutouts have led to decreases in natural frequency values as a result of reduction in stiffness caused by the cut-outs. This point out that employment of cut-outs can be a promising application to meet the natural frequency requirements of engineering systems constructed with hybrid fiber reinforced composite laminates.

Buckling characteristics of nano‐silica doped carbon fiber reinforced composites having cutouts

“…% nano‐silica and without cutout were seen as 22.9% and 8.75% for the specimens having circular and semicircular cutouts, respectively. Özbek and Tokur Bozkurt 55 reported that cutouts had a negative impact on the vibration characteristics of the basalt/carbon hybrid composites due to the reductions in stiffness.…”