The hybridization approach in composites is used to improve the impact resistance and the damage tolerance of laminates. It is usually based on the use of two different reinforcing fibres (alternatively stacked, commingled or interpenetrated), one having high stiffness and the other having high toughness. Such approach is effective in improving the low velocity impact resistance of the composites but it poses new issues related to the different specific properties of used fibres (coefficient of thermal expansion, interface compatibility, residual stresses after the laminate production to name a few). A new design has been recently proposed for thermoplastic composites based on the gradation of the interlaminar interface strength (IGIS). The interface strength between fibres and matrix is graded through the thickness by alternating woven fibres with compatibilized or not compatibilized polymeric layers. IGIS laminates involving a commercial grade of polypropylene (PP) as matrix and a woven glass fabric as the reinforcement have been prepared with different interface strength configurations (symmetrically or asymmetrically with respect to the middle plane) by means of the well-known film stacking technique. In this contribution Micro Computerized Axial Tomography (MicroCT) analysis was used to investigate the actual damage mechanisms occurring in IGIS laminates and showed how the graded interface strength is capable of shifting fibre breakage at higher impact energies and allowing elastic recovery in conditions such to significantly damage the fully compatibilized laminate configuration. © 2016, European Conference on Composite Materials, ECCM. All rights reserved.

Micro-CT analisys of interlaminar graded interface strength (IGIS) composites based on a thermoplastic matrix / Sorrentino, L; Russo, P.; Sarasini, Fabrizio; Tirillo', Jacopo; Touchard, F.; Chocinski Arnault, L.; Mellier, D.. - ELETTRONICO. - (2016). (Intervento presentato al convegno 17th European Conference on Composite Materials, ECCM 2016 tenutosi a Munich, Germany).

Micro-CT analisys of interlaminar graded interface strength (IGIS) composites based on a thermoplastic matrix

SARASINI, Fabrizio;TIRILLO', Jacopo;
2016

Abstract

The hybridization approach in composites is used to improve the impact resistance and the damage tolerance of laminates. It is usually based on the use of two different reinforcing fibres (alternatively stacked, commingled or interpenetrated), one having high stiffness and the other having high toughness. Such approach is effective in improving the low velocity impact resistance of the composites but it poses new issues related to the different specific properties of used fibres (coefficient of thermal expansion, interface compatibility, residual stresses after the laminate production to name a few). A new design has been recently proposed for thermoplastic composites based on the gradation of the interlaminar interface strength (IGIS). The interface strength between fibres and matrix is graded through the thickness by alternating woven fibres with compatibilized or not compatibilized polymeric layers. IGIS laminates involving a commercial grade of polypropylene (PP) as matrix and a woven glass fabric as the reinforcement have been prepared with different interface strength configurations (symmetrically or asymmetrically with respect to the middle plane) by means of the well-known film stacking technique. In this contribution Micro Computerized Axial Tomography (MicroCT) analysis was used to investigate the actual damage mechanisms occurring in IGIS laminates and showed how the graded interface strength is capable of shifting fibre breakage at higher impact energies and allowing elastic recovery in conditions such to significantly damage the fully compatibilized laminate configuration. © 2016, European Conference on Composite Materials, ECCM. All rights reserved.
2016
17th European Conference on Composite Materials, ECCM 2016
Damage tolerance; Matrix hybridization; MicroCT analysis; Ceramics and Composites
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Micro-CT analisys of interlaminar graded interface strength (IGIS) composites based on a thermoplastic matrix / Sorrentino, L; Russo, P.; Sarasini, Fabrizio; Tirillo', Jacopo; Touchard, F.; Chocinski Arnault, L.; Mellier, D.. - ELETTRONICO. - (2016). (Intervento presentato al convegno 17th European Conference on Composite Materials, ECCM 2016 tenutosi a Munich, Germany).
File allegati a questo prodotto
File Dimensione Formato  
Sorrentino_MicroCT_2016.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.53 MB
Formato Adobe PDF
2.53 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/958612
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact