Evolution mechanism of compression deformation of carbon black reinforced epoxy resin composites

Abstract

In this paper, the double-element composites were developed, which contained the epoxy resin as matrix phase and carbon black rubber powder as toughening materials. Quasi-static compression tests on epoxy resin and different mass fractions carbon black rubber powder-epoxy resin composites were performed in room temperature to test their compression properties. The energy absorption performance and the energy absorption efficiency of the composites were calculated according to the compression curve. The fracture characteristics of the micro appearance of the compressed material specimen were observed by scanning electron microscope. The deformation mode of the composite was analyzed. By systematically analyzing the effects of carbon black rubber powder content on the mechanical properties of carbon black rubber powder-epoxy resin, it was found that carbon black rubber powder as a reinforced material could effectively improve the brittleness of epoxy resin, the yield strength and the adsorption properties and efficiency of composites. With the mass fraction of carbon black rubber powder increasing, the energy absorption performance of carbon black rubber powder-epoxy resin first increases and then decreases. The most significant performance observed was at a mass fraction of 5 % in carbon black rubber powder-epoxy resin composites.

Study on Mechanical Properties and Fracture Mechanisms of Lignin Fiber/epoxy Resin Composites

“…Lignin fiber/epoxy resin composites were prepared by atmospheric pressure stirring casting. The preparation of lignin fiber / epoxy resin composites includes surface treatment of lignin fiber, dilution of epoxy resin matrix material, stirring and curing of composites, etc [17,18]. E51 bisphenol A epoxy resin (guangzhou Suixin Chemical Co., LTD.) was selected as the matrix of the composite.…”

Mechanical Properties and Failure Behavior of Epoxy Rubber Powder Composites Reinforced with Hollow Beads

“…Based on the previous research of our group, it was shown that carbon black rubber powder epoxy resin composites with a mass fraction of 5% showed the best mechanical properties [33], so in this study, fly ash hollow beads were used to toughen the rubber powder epoxy resin matrix with a mass fraction of 5%. Quasi-static compression tests were carried out using a universal testing machine to obtain stressstrain curves, focusing on the compression characteristics of the specimens.…”