On the toughness of polymer nanocomposites assessed by the essential work of fracture (EWF) approach

J. Karger-Kocsis, T. Bárány, L. Mészáros, V. M. Khumalo, A. Pegoretti

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The essential work of fracture (EWF) approach is widely used to determine the plane stress fracture toughness of highly ductile polymers and related composites. To shed light on how the toughness is affected by nanofillers EWF-suited model polymers, viz. amorphous copolyester and polypropylene block copolymer were modified by multiwall carbon nanotube (MWCNT), graphene (GR), boehmite alumina (BA) and organoclay (MMT) in 1 wt.%. EWF tests were performed on deeply double edge notched tensile loaded (DEN-T) specimens under quasistatic loading conditions. Data reduction occurred by energy partitioning between yielding and necking/tearing. The EWF prerequisites were not met with MWCNT and GR. BA affected the EWF parameters at least. Results indicated that incorporation of nanofillers usually enhanced the specific essential work of fracture, however, at cost of the specific non-essential work of fracture parameter. This means that the resistance to crack initiation and to crack propagation can hardly be improved at the same time with nanofillers.

Original languageEnglish
Title of host publicationECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials
PublisherEuropean Conference on Composite Materials, ECCM
ISBN (Print)9788888785332
Publication statusPublished - Jan 1 2012
Event15th European Conference on Composite Materials: Composites at Venice, ECCM 2012 - Venice, Italy
Duration: Jun 24 2012Jun 28 2012

Publication series

NameECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials

Other

Other15th European Conference on Composite Materials: Composites at Venice, ECCM 2012
CountryItaly
CityVenice
Period6/24/126/28/12

    Fingerprint

Keywords

  • Nanocomposite
  • Plane stress
  • Thermoplastics
  • Toughness

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Karger-Kocsis, J., Bárány, T., Mészáros, L., Khumalo, V. M., & Pegoretti, A. (2012). On the toughness of polymer nanocomposites assessed by the essential work of fracture (EWF) approach. In ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials (ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials). European Conference on Composite Materials, ECCM.