Healing of microsphere cores in sandwich composites

David M. Phillips, Jeffery W. Baur

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

Abstract

The primary purposes of a core in a sandwich composite are to keep the face sheets separated by a fixed distance and to transmit shear stresses. Syntactic foam cores consisting of hollow glass microspheres and resin can form strong, lightweight cores. By underfilling the interstitial space in a packed microsphere bed with a binder, a three-phase syntactic foam is created that has a percolated void network. In a sealed sandwich composite, a void network allows for the entire core of the sandwich composite to be evacuated and mechanically compressed by the exterior pressure. By combining this compression with a heating cycle, it is possible to repair core cracking and core/face sheet interface debonding when a reversible binder is used. Upon cooling, the healed sandwich restores its properties. We examine the relation between the mechanical properties of these sandwich composites and the healing methodologies.

Original languageEnglish (US)
Title of host publicationASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010
PublisherAmerican Society of Mechanical Engineers
Pages115-119
Number of pages5
ISBN (Print)9780791844168
DOIs
StatePublished - 2010
Externally publishedYes
EventASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010 - Philadelphia, PA, United States
Duration: Sep 28 2010Oct 1 2010

Publication series

NameASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010
Volume2

Other

OtherASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010
Country/TerritoryUnited States
CityPhiladelphia, PA
Period9/28/1010/1/10

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Biomaterials

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