Measuring strains through the thickness of a composite structural specimen subjected to bending

M. Mulle*, R. Zitoune, F. Collombet, L. Robert, Y. H. Grunevald

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


This study concerns the central reinforced zone of a composite structural specimen. In order to estimate the strain distribution during a series of three and four-point bending tests, several optical fiber Bragg grating sensors have been embedded in various levels of the ply stack. Simultaneously, surface strain field measurements by 3-D digital image correlation are undertaken. Both techniques show a general linear distribution of longitudinal strains through the thickness of the thick zone but values are slightly different. A numerical model is developed and a test-calculation dialogue is carried out. The complementary information given by the two optical techniques for in-core and surface measurements reveals the importance of considering structural and edge effects.

Original languageEnglish (US)
Pages (from-to)877-880
Number of pages4
JournalExperimental Mechanics
Issue number6
StatePublished - Dec 2009
Externally publishedYes


  • 3-D digital image correlation
  • Bending tests
  • Composites
  • Fiber Bragg gratings
  • Finite element analysis

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Measuring strains through the thickness of a composite structural specimen subjected to bending'. Together they form a unique fingerprint.

Cite this