A simplified modal-based method to quantify delamination in carbon fibre-reinforced plastic beam

Mehdi Khammassi, Rizwan Wali, Abdulaziz Al-Mutory, Arslan Yousaf, Sadok Sassi, Mohamed Gharib

Research output: Contribution to journalArticle

2 Citations (Scopus)


This study contributes to our knowledge about the detection and recognition of carbon fibre-reinforced plastic (CFRP) composites by using a modal analysis technique. Delamination was artificially induced during the manufacturing process of CFRP beams so that the dimension and location of the artificial delamination were known. The first three longitudinal bending modes were considered for detecting, locating, and evaluating the delamination. Contrary to what is commonly practised, the sensor placed on the CFRP structure had a large mass in order to contribute actively to restricting the delamination and hence modifying the structure’s natural frequencies, thus making it much easier to monitor its health condition. The technique was implemented on a beam with a delamination gap of 9% of the beam’s length, positioned within the span of the beam. The results demonstrate that the proposed technique can be effective not only to locate the delamination but also to measure its extent accurately.

Original languageEnglish
JournalNondestructive Testing and Evaluation
Publication statusPublished - 1 Jan 2019



  • Carbon fibre-reinforced plastic
  • condition health monitoring
  • delamination
  • modal analysis

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)

Cite this