Measurement of fracture toughness for fiber compressive failure mode of UD composites under high rate loading

P. Kuhn, G. Catalanotti, José Xavier, R. Cidade, H. Koerber, P.P. Camanho

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

Abstract

This work presents an experimental study of the compressive crack resistance curve of an unidirectional composite when submitted to dynamic loading. The data reduction couples the concepts of energy release rate, size effect law and R-curve. Double-edge notched specimens of four different sizes are used. Both split-Hopkinson pressure bar and quasi-static reference tests are performed. Under dynamic loading, the same strain rate is used for all specimen types to enable a reliable determination of the size effect. The full crack resistance curves at both investigated strain rate regimes are obtained on the basis of quasi-static fracture analysis theory. The results show that the steady state fracture toughness of the fiber compressive failure mode of the unidirectional carbon-epoxy composite material IM7-8552 is 165.6 kJ/m2 and 101.6 kJ/m2 under dynamic and quasi-static loading, respectively. Therefore the compressive fracture toughness is found to increase with increasing strain rate.

Original languageEnglish
Title of host publicationECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
PublisherEuropean Conference on Composite Materials, ECCM
ISBN (Electronic)9783000533877
Publication statusPublished - 2016
Externally publishedYes
Event17th European Conference on Composite Materials, ECCM 2016 - Munich, Germany
Duration: 26 Jun 201630 Jun 2016

Conference

Conference17th European Conference on Composite Materials, ECCM 2016
CountryGermany
CityMunich
Period26/06/201630/06/2016

Keywords

  • Experimental techniques
  • Fracture toughness
  • High strain rate loading

ASJC Scopus subject areas

  • Ceramics and Composites

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  • Cite this

    Kuhn, P., Catalanotti, G., Xavier, J., Cidade, R., Koerber, H., & Camanho, P. P. (2016). Measurement of fracture toughness for fiber compressive failure mode of UD composites under high rate loading. In ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials European Conference on Composite Materials, ECCM.