Flexural fatigue properties of an inorganic matrix-carbon fiber composite

Andrew J. Foden, P. Balaguru, Richard E. Lyon, Joseph Davidovits

Research output: Contribution to journalConference article

6 Scopus citations


The results of an experimental investigation of a potassium aluminosilicate (Geopolymer) - carbon composite under flexural fatigue loading are presented in this paper. This matrix used is a new fire resistant inorganic polymer. The coupons were cut from a composite plate made using 12 layers of T-300 3 k plain weave carbon fabric, with an approximate plate thickness of 3 mm. The coupons were simply supported over a span of 100 mm and subjected to a sinusoidal loading at the midspan using an MTS Teststar servo controlled hydraulic load frame at a rate of ten hertz. A minimum load of 10% of static failure load was maintained for all the samples and the maximum load was varied from 50 to 90% of the static failure load. Both the fatigue life and the load-deflection behavior were monitored. The results indicate that the composite can withstand more than one million cycles if the stress range (maximum stress - minimum stress) is less than 45 percent of the static failure load. The S-N curve (stress range vs cycles to failure) is similar to the ones obtained for other structural materials. The deflection at maximum load increases with the number of cycles indicating the presence of cyclic creep behavior.

Original languageEnglish (US)
Pages (from-to)1345-1354
Number of pages10
JournalInternational SAMPE Symposium and Exhibition (Proceedings)
Issue number2
StatePublished - Jan 1 1997
EventProceedings of the 1997 42nd International SAMPE Symposium and Exhibition. Part 1 (of 2) - Anaheim, CA, USA
Duration: May 4 1997May 8 1997

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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