Influence of 2D and 3D Arrangements of Aramid Fibers on the Dart Drop Test of Epoxy Composites

Authors

  • Carlos Alberto Fernandes Marlet Universidade Federal de São Paulo – Instituto de Ciência e Tecnologia – Laboratório de Tecnologia de Polímeros e Biopolímeros – São José dos Campos/SP – Brazil. https://orcid.org/0000-0003-1191-1435
  • Thiago de Carvalho Silva Universidade Federal de São Paulo – Instituto de Ciência e Tecnologia – Laboratório de Tecnologia de Polímeros e Biopolímeros – São José dos Campos/SP – Brazil | Centro Federal de Educação Tecnológica Celso Suckow da Fonseca – Coordenação de Engenharia Mecânica – Angra dos Reis/RJ – Brazil. https://orcid.org/0000-0002-3695-8515
  • Mirabel Cerqueira Rezende Universidade Federal de São Paulo – Instituto de Ciência e Tecnologia – Laboratório de Tecnologia de Polímeros e Biopolímeros – São José dos Campos/SP – Brazil. https://orcid.org/0000-0002-3735-8765

Keywords:

Aramid/epoxy composites, 3D arrangement, Impact strength, Dart drop test

Abstract

The use of continuous fibers reinforced polymeric composites has increased substantially in the last year’s due to their high specific mechanical strength compared to other materials. Despite this property, this class of material is susceptible to low, medium, or high energy impacts, which can cause severe damage to composite laminates. One of the most serious damages is delamination, which can lead to partial or total rupture of the structure. In order to minimize this problem, several studies have been carried out in this area. In this context, this work aims to evaluate the influence of aramid reinforcement with bi-directional (2D) and tri-directional (3D) arrangements impregnated with two epoxy resins of different stiffness on the impact strength of composites submitted to the 340 J dart drop test. The impact results showed that the 2D composites had lower impact strength than the 3D ones, with the presence of perforations (when impregnated with the more rigid resin) and delaminations. Delaminations occurred regardless of the epoxy resin used in the impregnation. On the other hand, the 3D composites impregnated with the less rigid epoxy matrix absorbed more energy (3DF: 97.9%) with less deformation and no delamination compared to the 2D laminate (2DF: 96.1%) produced.


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Published

2023-08-21

Issue

Vol. 15 (2023)

Section

Original Papers

License

Copyright (c) 2023 Carlos Alberto Fernandes Marlet, Thiago de Carvalho Silva, Mirabel Cerqueira Rezende

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

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