Mode I toughness of a particulate interlayered composite as a function of moisture and temperature

M. A. Soffa, B. D. Davidson, M. Kumar

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

2 Scopus citations

Abstract

A study was conducted to determine the mode I toughness of T800H/3900-2 graphite/epoxy under a range of environments that are typical of aircraft and spacecraft operating conditions. Double cantilever beam tests were performed on both dry and moisture-saturated specimens at temperatures of -43°C, 21°C and 98°C, and on dry specimens only at 125°C. Under certain conditions, nonlinear behavior and permanent deformations were observed. Thus, a sub-study was performed to choose a data reduction method that could be used to accurately obtain the mode I toughness under all test conditions, from which a "load based compliance calibration method" was selected. At a given moisture content, it was found that toughness increased with increasing temperature. Except for the tests at -43°C, toughness was also found to increase with increasing moisture content. However, dramatically different behaviors were evidenced by the resistance curves from the various conditions. Aided by scanning electron microscopy, these results are explained by the mechanisms of crack advance, including the amount of plasticization of the matrix, matrix viscoelasticity, and the path of the growing delamination.

Original languageEnglish (US)
Title of host publicationAmerican Society for Composites - 21st Technical Conference of the American Society for Composites 2006
Pages67-86
Number of pages20
StatePublished - Dec 1 2006
Event21st Technical Conference of the American Society for Composites 2006 - Dearborn, MI, United States
Duration: Sep 17 2006Sep 20 2006

Publication series

NameAmerican Society for Composites - 21st Technical Conference of the American Society for Composites 2006
Volume1

Other

Other21st Technical Conference of the American Society for Composites 2006
CountryUnited States
CityDearborn, MI
Period9/17/069/20/06

ASJC Scopus subject areas

  • Ceramics and Composites

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  • Cite this

    Soffa, M. A., Davidson, B. D., & Kumar, M. (2006). Mode I toughness of a particulate interlayered composite as a function of moisture and temperature. In American Society for Composites - 21st Technical Conference of the American Society for Composites 2006 (pp. 67-86). (American Society for Composites - 21st Technical Conference of the American Society for Composites 2006; Vol. 1).