Slow-growth damage tolerance for fatigue after impact in FRP composites: Why current research won’t get us there

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Abstract

Impact damage in CFRP structures is currently managed using the ‘no-growth’ concept, meaning that damage is not allowed to grow under fatigue loading. This requires that stresses in the material are kept below the fatigue limit, imposing a significant weight penalty. A ‘slow-growth’ concept would allow more efficient structural designs, but several knowledge gaps need to be addressed before this is possible. These gaps exist in three main areas: (1) damage characterisation, (2) fatigue driven delamination growth after impact, and (3) final failure of impacted laminates. The paper highlights open questions and the shortcomings of current research in addressing them, and suggests avenues for future research.
Original languageEnglish
Pages (from-to)726-733
Number of pages8
JournalProcedia Structural Integrity
Volume28
DOIs
Publication statusPublished - 2020
Event1st Virtual European Conference on Fracture - Virtual/online event due to COVID-19
Duration: 29 Jun 20201 Jul 2020
https://www.vecf1.eu/

Keywords

  • Compression after impact
  • Damage management
  • Damage tolerance

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