A methodology for the rapid characterization of Mode II delamination fatigue threshold in FRP composites

Giuseppe Pitarresi*, Tommaso Scalici, Marco Dellaira, Giuseppe Catalanotti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
52 Downloads (Pure)

Abstract

A new methodology to measure the Mode II interlaminar fracture in fatigue for FRP composites is developed. The proposed methodology uses a Modified Transvers Crack Tensile (MTCT) specimen and is able to characterize the near threshold behavior in a robust, easier and significantly faster way than standard procedures. Analytical formulae, able to link the crack growth rate to the load or strain amplitudes, were found and verified, and their importance was explained, in particular, for what concerns the characterisation of the near threshold behavior. Experiments were performed both in load and strain control, while the delamination growth was monitored using different techniques including the Thermoelastic Stress Analysis (TSA). Experiments showed the reliability and effectiveness of the proposed procedure, and evidence its suitability and compatibility with current industrial material testing and qualification protocols with particular emphasis to industrial environment where a “no growth” design approach is employed.

Original languageEnglish
Article number106629
JournalEngineering Fracture Mechanics
DOIs
Publication statusPublished - 12 Sep 2019

Keywords

  • Fatigue
  • Fibre reinforced composites
  • Mode II fracture toughness
  • Paris law
  • Transverse crack tensile specimen

ASJC Scopus subject areas

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

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