< Terug naar vorige pagina

Publicatie

Exploring discontinuities and hybridization to design gradual failure in unidirectional carbon fiber/self-reinforced polypropylene composites

Boekbijdrage - Boekhoofdstuk Conferentiebijdrage

© 2017 International Committee on Composite Materials. All rights reserved. Both discontinuous fiber-reinforced composites and hybrid composites show the potential to overcome the stiffness-toughness dilemma that conventional fiber reinforced polymer composites suffer from. To fully utilize the advantages of discontinuities and hybridization, careful design of the configuration of discontinuities is required. In this paper, high-precision fiber cuts with a staggered pattern were introduced in the unidirectional carbon fiber layer of hybrid carbon fiber/self-reinforced polypropylene composites. This aimed to control the failure mechanisms, hence targeting a gradual failure in tension. The effect of the geometrical parameters of the patterns, including cut length, cut fraction and step length, were investigated. The tensile behavior of the hybrids was influenced by a combined effect of these three parameters. The hybrids exhibited three types of the failure behavior: 1) single fracture of the carbon fiber layer followed by single delamination growth, 2) carbon fiber layer fragmentation accompanied by multiple delamination growth and 3) multiple delamination growth without carbon fiber layer fracture. In the regime of carbon fiber layer fragmentation accompanied by multiple delamination growth, a gradual failure with relatively high damage resistance was achieved.
Boek: Proceedings ICCM21
Jaar van publicatie:2017
Toegankelijkheid:Open