Hygrothermal studies on syntactic foams and compressive strength determination

Nikhil Gupta, Eyassu Woldesenbet

Research output: Contribution to journalArticle

Abstract

Syntactic foams are commonly used as core materials in composite sandwich structures for weight sensitive applications such as aircraft and spacecraft structures and boat hulls. Moisture absorption is highly undesirable in these applications. The present study evaluates the hygrothermal properties of two types of syntactic foams. Distribution of outer diameter of cenospheres (hollow particles) incorporated in both types of syntactic foams is the same but there is variation in the internal diameter causing difference in the density of syntactic foams. Epoxy resin is used as matrix material and the volume fractions of matrix and cenospheres are kept at 0.35 and 0.65 by volume, respectively. Moisture absorption experiments are conducted at two different temperatures, 25 and 70 °C and in deionized and salt waters. Non-destructive ultrasonic imaging technique is used to find the extent of moisture penetration and damage to the specimens. Syntactic foam samples are tested for compressive strength after moisture absorption and the results are compared with the compression test results of dry syntactic foam samples.

Original languageEnglish (US)
Pages (from-to)311-320
Number of pages10
JournalComposite Structures
Volume61
Issue number4
DOIs
StatePublished - Sep 2003

Keywords

  • Cenospheres
  • Compression
  • Hygrothermal
  • Syntactic foam

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

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