Delamination Detection via Reconstructed Frequency Response Function of Composite Structures

A. Alsaadi*, Yu Shi, Yu Jia

*Corresponding author for this work

Research output: Chapter in Book/Published conference outputConference publication


Online damage detection technologies could reduce the weight of structures by allowing the use of less conservative margins of safety. They are also associated with high economical benefits by implementing a condition-based maintenance system. This paper presented a damage detection and location technique based on the dynamic response of glass fibre composite laminate structures (frequency response function). Glass fibre composite laminate plates of 200 200 2.64mm, which had a predefined delamination, were excited using stationary random vibration waves of 500 Hz band-limited noise input at 1.5 g. The response of the structure was captured via Micro-ElectroMechanical System (MEMS) accelerometer to detect damage. The frequency response function requires data from damaged structures only, assuming that healthy structures are homogeneous and smooth. The frequency response of the composite structure was then reconstructed and fitted using the least-squares rational function method. Delamination as small as 20 mm was detected using global changes in the natural frequencies of the structure, the delamination was also located with greater degree of accuracy due to local changes of frequency response of the structure. It was concluded that environmental vibration waves (stationary random vibration waves) can be utilised to monitor damage and health of composite structures effectively.

Original languageEnglish
Title of host publicationIntelligent Manufacturing and Mechatronics - Proceedings of the 2nd Symposium on Intelligent Manufacturing and Mechatronics – SympoSIMM 2019
EditorsMagd Abdel Wahab, Zamberi Jamaludin, Mohd Najib Ali Mokhtar
PublisherPleiades Publishing
Number of pages7
ISBN (Print)9789811383304, 9789811395383
Publication statusPublished - 2020
Event13th International Conference on Damage Assessment of Structures, DAMAS 2019 - Porto, Portugal
Duration: 9 Jul 201910 Jul 2019

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364


Conference13th International Conference on Damage Assessment of Structures, DAMAS 2019


  • Damage assessment
  • Frequency response function (FRF)
  • Structural health monitoring (SHM)
  • Structural integrity


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