Measurement of the mode II intralaminar fracture toughness and R-curve of polymer composites using a modified Iosipescu specimen and the size effect law

G. Catalanotti*, J. Xavier

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)
177 Downloads (Pure)

Abstract

A modified Iosipescu specimen is proposed to measure the mode II intralaminar fracture toughness and the corresponding crack resistance curve of fibre reinforced composites. Due to the impossibility of scaling the specimen, a modification of the classical size effect method is proposed. The calculation of the crack driving force curves is performed using the Finite Element Method. The classical Iosipescu shear feature was used and tests were coupled with digital image correlation to support the proposed approach. Experiments were performed on IM7/8552 material system and the R-curve was obtained. The steady-state value of the fracture toughness of the ply is found to be equal to R0ss=34.4kJ/m2.

Original languageEnglish
Pages (from-to)202-214
Number of pages13
JournalEngineering Fracture Mechanics
Volume138
Early online date10 Mar 2015
DOIs
Publication statusPublished - Apr 2015
Externally publishedYes

Keywords

  • A. Polymer-matrix composites (PMCs)
  • B. Fracture toughness
  • C. Analytical modelling
  • D. Mechanical testing

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

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