Defect quantification in 3D angle interlock glass fibre composites using acoustic emission

Matthieu Gresil, Mohamed Nasr Saleh, Mubeen Arshad, Constantinos Soutis

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


In addition to manufacturing cost and production rates, damage tolerance has become a major issue for the composites industry. Three-dimensional (3D) woven composites have superior through-thickness properties compared to two-dimensional (2D) laminate, for example, improved impact damage tolerance, high interlaminar fracture toughness and reduced notch sensitivity. The performance of 3D woven preforms is dependent on the fabric architecture which is determined by the binding pattern. Different combinations of 3D woven preforms can be produced given the variation of the binding pattern. They can be classified into angle interlock and orthogonal interlock according to the binder orientation, or through-thethickness and layer-to-layer if the penetration depth of binders is involved. For this study, angle interlock (AI) structures with through-thickness and layer-to-layer binding were manufactured. Monitoring of acoustic emission (AE) during mechanical loading is an effective and widely used tool in the study of damage processes in glass fiber-reinforced composites. Tests were performed with piezoelectric sensors bonded on a tensile specimen acting as passive receivers of AE signals. A new set of experimental data has been generated which will be useful for validating multi-physics numerical models, providing insight into the damage behaviour of novel 3D AI glass fibre composites, and may ultimately lead to more effective material selection and determination of design limits. The paper finishes with conclusions and suggestions for further work.

Original languageEnglish
Title of host publication8th European Workshop on Structural Health Monitoring, EWSHM 2016
Number of pages10
ISBN (Electronic)9781510827936
Publication statusPublished - 2016
Externally publishedYes
EventEuropean Workshop on Structural Health Monitoring 2016 - Bilbao, Spain
Duration: 5 Jul 20168 Jul 2016
Conference number: 8th


ConferenceEuropean Workshop on Structural Health Monitoring 2016
Abbreviated titleEWSHM 2016
Internet address


  • 3D woven composite materials
  • Acoustic emission
  • Lamb waves
  • Multi-physics finite element modeling
  • Smart structures

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