MECHCOMP7 - 7th International Conference on Mechanics of Composites, Porto, Portugal, 1 - 03 September 2021, vol.1, no.1, pp.81
In this study, epoxy resin with high-performance properties was used as a matrix material. As a reinforcement material, spread tow carbon fiber produced in different weaving designs was preferred instead of woven carbon fiber fabrics widely used. In addition, a single-wall carbon nanotube was added to the resin. Hand lay-up and hot press methods were used together as the production method. The mechanical, physical, and thermal properties of the produced composite plates were investigated.
Furthermore, the mechanical properties of sandwich panels obtained by adhering to the produced composite panels on an aluminum honeycomb were also examined. Additionally, an experimental study of the behavior of composite plate bonded aluminum honeycomb core sandwiches under blast loads was carried out by using a shock tube setup. Shock pressure was measured with high-precision piezoelectric pressure gauges. The speed and acceleration of the shock pressure wave, the impulse, and momentum values affecting the sandwich panels were calculated.
As a result of the mechanical tests, it has been observed that the resistance of the obtained composite plates and sandwich panels against bi-axial stresses is relatively high. Shock tube test results were evaluated depending on the density and type of composites and by comparing the deformations and damage modes of the sandwich panels.
Spread tow type carbon fibers can withstand high tensions despite their low weight. For this reason, the spread tow carbon fiber reinforced composites may become widespread in the aviation and space industry, as they are lighter and more resistant.