4.3 Article

Characterization of interlaminar shear properties of nanostructured unidirectional composites

Journal

COMPOSITE INTERFACES
Volume 28, Issue 2, Pages 191-208

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.1080/09276440.2020.1747341

Keywords

Composites; carbon fiber; carbon nanotubes; tensile strength; interlaminar shear strength

Funding

  1. Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
  2. Instituto Nacional de Pesquisas Espaciais (INPE)
  3. Aeronautical Technology Institute (ITA)
  4. Aeronautics and Space Institute (IAE)

Ask authors/readers for more resources

The study focused on enhancing the interlaminar properties of composites by depositing carbon nanotubes on carbon fiber surfaces. The results showed improved adhesion between carbon fibers and the matrix, leading to increased shear strength and fracture toughness. However, limitations were observed in the fracture toughness analysis due to fragile pathways in intralaminar regions.
Composites are key materials in the aerospace and aeronautics industry. However, a disadvantage is their susceptibility to interlaminar fracture because of poor adhesion at fiber surface and matrix interface. Carbon nanotube (CNT) growth onto carbon fiber (CF) surface is a promising method to increase CF-matrix adhesion. This work studies interlaminar properties of unidirectional CF composites and thermoset matrix, with CNT deposition on CF surface. CNT growth goes along in chemical vapor deposition with a floating catalyst of ferrocene and flow of CO2 and C2H2 precursors. Tensile strength tests on single-filament and CF tow showed the preservation of tensile properties after preparation and growth. Results of the interlaminar shear strength study presented a 35% increase in shear strength and a 15% increase in fracture toughness at the initial delamination crack. An overall analysis reveals an improvement in the interlaminar interface on mechanical tests; however, fracture toughness analysis is limited by fragile pathways in intralaminar regions.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.3
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available