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Proceedings Paper

Passive smart self-repair in polymer matrix composite materials
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Paper Abstract

An investigation was made into the feasibility of developing a smart polymer matrix composite which has the ability to self-repair internal microcracks due to thermo-mechanical loading. The investigation focuses on the controlled cracking of hollow repair fibers dispersed in a composite and the subsequent timed release of chemicals which results in the sealing of matrix microcracks and the rebonding of damaged interfaces. In this preliminary work, the mechanisms of chemical release from a single repair fiber embedded in a polymer matrix were investigated using experimental analyses. It was found that controlled cracking of the repair fiber and subsequent release of the repair chemicals could be achieved by applying a polymer coating to the surface of the repair fibers. Release of chemicals into cracks was observed using optical microscopy and photoelasticity. Fiber pull-out and impact tests were performed to examine the ability to rebond fibers and fill cracks, respectively.

Paper Details

Date Published: 23 July 1993
PDF: 7 pages
Proc. SPIE 1916, Smart Structures and Materials 1993: Smart Materials, (23 July 1993); doi: 10.1117/12.148501
Show Author Affiliations
Carolyn M. Dry, Univ. of Illinois/Urbana-Champaign (United States)
Nancy R. Sottos, Univ. of Illinois/Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 1916:
Smart Structures and Materials 1993: Smart Materials
Vijay K. Varadan, Editor(s)

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