Novel method for determination of critical fiber length in short fiber carbon/carbon composites by double lap joint

Daniel Heim, Mathias Hartmann, Johannes Neumayer, Christian Klotz, Ömer Ahmet-Tsaous, Swen Zaremba, Klaus Drechsler

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

A novel approach is introduced for the experimental determination of critical fiber length in carbon fiber reinforced carbon (CFRC) composites. Critical fiber length is investigated using double lap joint samples. The transition of failure mode from bonding failure to fiber fraction with increasing overlap length correlates with the critical fiber length. Tested overlap lengths were in the range of 4-100 mm. For CFRC at hand, failure mode changes at an overlap length of 26 ± 2 mm. Hence critical fiber length is derived as lc = 52 ± 4 mm.

Original languageEnglish
Pages (from-to)365-370
Number of pages6
JournalComposites Part B: Engineering
Volume54
Issue number1
DOIs
StatePublished - 2013

Keywords

  • A. Carbon fiber
  • A. Carbon-carbon composites (CCCs)
  • A. Discontinuous reinforcement
  • B. Fiber/matrix bond

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