Mechanical properties of microcapsules for a self-healing composite

M. W. Keller, Nancy R Sottos

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

Abstract

Capsule properties such as shell-wall modulus and burst strength have great influence on capsule suitability as a mechanical trigger in a self-healing composite. The elastic modulus and failure behavior of a poly(urea-formaldehyde) shelled microcapsule was determined through single capsule compression tests. A shell theory model for the compression of a spherical fluid-filled shell was utilized to extract the shell-wall modulus values from the load-displacement data. The model assumed constant encapsulated volume and a linear elastic shell-wall constitutive relationship. Average shell-wall modulus was ca. 3.6 GPa, independent of capsule diameter. However, burst strength was found to be highly dependant on capsule diameter.

Original languageEnglish (US)
Title of host publicationProceedings of the 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics
Pages279-280
Number of pages2
StatePublished - Dec 1 2005
Event2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics - Portland, OR, United States
Duration: Jun 7 2005Jun 9 2005

Publication series

NameProceedings of the 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics

Other

Other2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics
CountryUnited States
CityPortland, OR
Period6/7/056/9/05

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Keller, M. W., & Sottos, N. R. (2005). Mechanical properties of microcapsules for a self-healing composite. In Proceedings of the 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics (pp. 279-280). (Proceedings of the 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics).