Printable epoxy core for hybrid manufacturing of composite sandwich structures

Andrew C. Abbott, Gyaneshwar P. Tandon, Hilmar Koerner, Jeffery W. Baur

Research output: Contribution to conferencePaperpeer-review

Abstract

Composite sandwich structure cores are used for weight reduction without sacrificing stiffness, but their design is not engineered to optimize performance under given in-service loading conditions. In order to realize optimal performance, an engineer needs customizability, geometric complexity, and manufacturing process flexibility - all attributes of additive manufacturing. Another benefit of additive manufacturing is the potential to reduce the number of sandwich composite manufacturing steps by printing a core directly onto prepreg preforms with a material of similar chemistry and co-curing the structure. To this end, honeycomb cores are printed with a chopped fiber reinforced epoxy ink onto carbon fiber epoxy prepreg. As a comparison, sandwich composites are also fabricated by adhesively bonding printed and cured honeycombs onto composite laminates and tested in 3-point flexure. Progress and challenges with these processes are discussed.

Original languageEnglish (US)
StatePublished - 2019
Externally publishedYes
Event6th Annual Composites and Advanced Materials Expo, CAMX 2019 - Anaheim, United States
Duration: Sep 23 2019Sep 26 2019

Conference

Conference6th Annual Composites and Advanced Materials Expo, CAMX 2019
Country/TerritoryUnited States
CityAnaheim
Period9/23/199/26/19

ASJC Scopus subject areas

  • Aerospace Engineering
  • Industrial and Manufacturing Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Renewable Energy, Sustainability and the Environment

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