An Experimental Study on the Use of Static Effective Modulus Theories in Dynamic Problems

John J. Ditri, Joseph L. Rose

Research output: Contribution to journalArticle

2 Scopus citations


In a recent paper [1] the effective elastic constants of a [0, ±45,0] 36 graph ite epoxy laminated composite were determined by ultrasonic wave velocity information, and the Young's moduli calculated from these constants were compared to those obtained using a quasi-static loading technique for six different directions. In this article, the previ ously obtained results are compared to those predicted using a three-dimensional static effective modulus theory [2]. It is shown that, if low frequency ultrasonic waves are used, the calculated Young's moduli compare favorably with both the static measurements and those predicted by the effective modulus theory. Comments on the applicability of the various measurement techniques for different purposes are also discussed.

Original languageEnglish (US)
Pages (from-to)934-943
Number of pages10
JournalJournal of Composite Materials
Issue number9
StatePublished - Sep 1993


All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry

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