Self-healing of skin-stiffener debond specimens under fatigue conditions

Rafael Luterbacher, Richard S. Trask, Ian P. Bond

Research output: Contribution to conferenceConference Paper

Abstract

Intralaminar damage is one of the first damage mechanisms to occur in fibre reinforced polymers. Even though the effect on the mechanical properties is limited, it acts as an initiation point for subsequent interlaminar damage. Within this study, a vascular self-healing approach has been used in cross-ply laminates in order to mitigate transverse intralaminar damage by infusing low viscosity epoxy resins into the damage plane. Under static loading, the stiffness was recovered successfully, however, under fatigue loading the mechanical properties of the healing agent proved to be insufficient. The vascular healing approach was also applied to skin-stiffener debond specimens loaded under tensile-tensile fatigue. In this case the skin failed by material failure of the off-axis plies leading to intralaminar matrix damage. By introducing the vascular network it was possible to infuse the damage sites and partly recover the structural stiffness, however, the location of the vascules was shown to be detrimental to the mechanical properties of the structure under fatigue loading. Ongoing work is underway to optimise both the healing agent performance and vascule location for the components described above.

Original languageEnglish
Publication statusPublished - 1 Jan 2015
Event20th International Conference on Composite Materials, ICCM 2015 - Copenhagen, Denmark
Duration: 19 Jul 201524 Jul 2015

Conference

Conference20th International Conference on Composite Materials, ICCM 2015
CountryDenmark
CityCopenhagen
Period19/07/1524/07/15

Keywords

  • Bonded joint
  • Cross-ply laminate
  • Fibre reinforced polymers
  • Intralaminar damage
  • Self-healing

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    Luterbacher, R., Trask, R. S., & Bond, I. P. (2015). Self-healing of skin-stiffener debond specimens under fatigue conditions. Paper presented at 20th International Conference on Composite Materials, ICCM 2015, Copenhagen, Denmark.