Self-healing sandwich panels: restoration of compressive strength after impact

Hugo R Williams, Richard S Trask, IP Bond

Research output: Contribution to journalArticle (Academic Journal)

138 Citations (Scopus)

Abstract

Impact damage can significantly reduce the strength of composite sandwich panels, giving rise to large factors of safety in design. A self-healing sandwich panel was designed and manufactured. Specimens were tested in edgewise compression-after-impact to prove the concept. The self-healing system consists of vascular networks carrying the two liquid components of an epoxy resin system. After damage and autonomous self-healing, the specimens could be restored to their undamaged strength. Key influences on healing efficiency, and the need for further improvements in reliability were identified. A simple specific strength analysis suggested that the mass penalty of self-healing could, in some cases, be offset by the improved design allowables permitted.
Translated title of the contributionSelf-healing sandwich panels: restoration of compressive strength after impact
Original languageEnglish
Pages (from-to)3171 - 3177
Number of pages7
JournalComposites Science and Technology
Volume68
Issue number15-16
DOIs
Publication statusPublished - Dec 2008

Bibliographical note

Publisher: Elsevier

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