Thermal regulation of vascularized polymer matrix composites for enhanced thermomechanical performance

Anthony M. Coppola, Nancy R. Sottos, Scott R. White

Research output: Contribution to conferencePaper

Abstract

Fires or other causes of unexpected increases in temperature cause polymer matrix composites (PMC) to fail under mechanical loads easily sustained at room temperature. However, heat can be removed and temperature reduced in PMCs by active cooling through an internal vascular network. During active cooling, fluid is pumped through the channels to transfer heat from the PMC to the fluid. Here we examine the ability of active cooling to enhance mechanical performance and survivability of PMCs under thermomechanical loading. Channels are manufactured into structural PMCs (i.e. carbon fiber/epoxy and glass fiber/epoxy) using the Vaporization of Sacrificial Components (VaSC) technique. During VaSC, a sacrificial template of the intended vascular network is embedded into the fiber preform prior to matrix curing, then removed at elevated temperatures to create a hollow vasculature. Two testing protocols are used to compare non-cooled and actively cooled PMCs under thermomechanical loading. In the first, a flexure test is conducted in a convective environment with temperatures above the glass transition temperature of the composite to compare retention of flexural modulus in the high temperature environment vs. at room temperature. In the second test, the time-to-failure of PMCs under sustained compressive load and one-sided radiant heating is measured. Results demonstrate the dramatic improvement in PMC performance under thermomechanical loading afforded by active cooling.

Original languageEnglish (US)
StatePublished - Jan 1 2015
Event20th International Conference on Composite Materials, ICCM 2015 - Copenhagen, Denmark
Duration: Jul 19 2015Jul 24 2015

Other

Other20th International Conference on Composite Materials, ICCM 2015
CountryDenmark
CityCopenhagen
Period7/19/157/24/15

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Keywords

  • Microvascular
  • Thermal Regulation
  • Thermomechanical

ASJC Scopus subject areas

  • Engineering(all)
  • Ceramics and Composites

Cite this

Coppola, A. M., Sottos, N. R., & White, S. R. (2015). Thermal regulation of vascularized polymer matrix composites for enhanced thermomechanical performance. Paper presented at 20th International Conference on Composite Materials, ICCM 2015, Copenhagen, Denmark.