Self-healing composite sandwich structures

Hugo R Williams, R. S. Trask, I. P. Bond

Research output: Contribution to journalArticle (Academic Journal)

126 Citations (Scopus)

Abstract

Impact damage can degrade the flexural strength of composite sandwich structures by over 50% due to a loss of skin support inducing localized skin buckling. Various self-healing methodologies have been applied to laminated composites but the concept of delivering a healing agent from a remote reservoir to a region of damage via a vascular network offers the potential for a robust and replenishable system housed in the core of a sandwich structure. In this pilot study a vascular sandwich structure that appears as a conventional sandwich composite has been developed and tested. The network has been shown to have negligible influence on the innate static mechanical properties of the host panel. Infiltration of the vascular network with a pre-mixed epoxy resin system after impact damage demonstrated a complete recovery of flexural failure mode and load. Infiltration with the same resin system from separate unmixed networks, where self-healing is initiated autonomously via mixing within the damage, has also been shown to fully recover undamaged failure load when both networks are successfully breached. © IOP Publishing Ltd.

Translated title of the contributionSelf-healing composite sandwich structures
Original languageEnglish
Article number031
Pages (from-to)1198-1207
Number of pages10
JournalSmart Materials and Structures
Volume16
Issue number4
DOIs
Publication statusPublished - Aug 2007

Bibliographical note

Publisher: Institute of Physics Publishing

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