Evaluation of the dynamic properties of an aluminum syntactic foam core sandwich

Emanuele Lamanna, Nikhil Gupta, Paolo Cappa, Oliver M. Strbik, Kyu Cho

Research output: Contribution to journalArticlepeer-review


The purpose of this study is to evaluate the dynamic mechanical properties of syntactic foam core sandwich structures. Aluminum matrix syntactic foams with carbon fabric skins are studied. Syntactic foams incorporate porosity in their foam-like structure by means of hollow particles. The material examined here is composed of a core made of aluminum A356 matrix filled with alumina hollow particles. Two types of sandwich composites are studied containing: (a) a single layer of carbon fabric and (b) three layers of the same fabric in 0°/90° orientation. Dynamic characterization was conducted using a free vibration method to determine the resonant frequency of the sandwich beams. The dynamic modulus, storage modulus, loss modulus and damping ratio were calculated from the test results. The experimental results were used to validate the predictions of a theoretical model. The experimental values for Young's modulus of one- and three-layer fabric sandwiches were measured to be 32.57 ± 2.15 and 37.33 ± 1.12 GPa, respectively. The experimental results are in close agreement with the theoretical model.

Original languageEnglish (US)
Pages (from-to)2987-2994
Number of pages8
JournalJournal of Alloys and Compounds
StatePublished - 2017


  • Dynamic property
  • Hollow particles
  • Metal matrix composite
  • Metal matrix syntactic foam
  • Vibration

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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