Syntactic foam core metal matrix sandwich composite: Compressive properties and strain rate effects

Mohammed Yaseer Omar, Chongchen Xiang, Nikhil Gupta, Oliver M. Strbik, Kyu Cho

Research output: Contribution to journalArticle

Abstract

The present work is the first attempt to study metal matrix syntactic foam core sandwich composites. The sandwich is studied for microstructure and compressive properties at quasi-static and high strain rates. Under quasi-static compressive conditions, specimens were tested in the flatwise and edgewise orientations. The compressive strength, yield strength and plateau stress were higher in the flatwise orientation. Furthermore, both orientations for the sandwich composites showed a higher specific compressive strength and specific yield strength than the foam core alone. Failure initiated in the particles in the flatwise orientation, but in the carbon fabrics in the edgewise orientation. The results show that the fabric had a reinforcing effect under quasi-static conditions. The high strain rate (HSR) characterization was conducted in the strain rate range 525-845s<sup>-1</sup> using a split-Hopkinson pressure bar set-up equipped with a high speed image acquisition system. Within this strain rate range, the compressive strength of the sandwich is similar to that of the syntactic foam core alone. Upon review, the syntactic foam core metal matrix sandwich outperforms most of the syntactic foams in terms of energy absorption and compressive strength at comparable density levels.

Original languageEnglish (US)
Pages (from-to)156-168
Number of pages13
JournalMaterials Science and Engineering A
Volume643
DOIs
StatePublished - Sep 3 2015

Fingerprint

Syntactics
foams
compressive strength
strain rate
Foams
Strain rate
Metals
Compressive strength
composite materials
Composite materials
matrices
metals
yield strength
Yield stress
Image acquisition
energy absorption
Energy absorption
plateaus
acquisition
Carbon

Keywords

  • Compression testing
  • High strain rate compression
  • Metal matrix composite
  • Sandwich composite
  • Syntactic foam

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Syntactic foam core metal matrix sandwich composite : Compressive properties and strain rate effects. / Yaseer Omar, Mohammed; Xiang, Chongchen; Gupta, Nikhil; Strbik, Oliver M.; Cho, Kyu.

In: Materials Science and Engineering A, Vol. 643, 03.09.2015, p. 156-168.

Research output: Contribution to journalArticle

Yaseer Omar, Mohammed ; Xiang, Chongchen ; Gupta, Nikhil ; Strbik, Oliver M. ; Cho, Kyu. / Syntactic foam core metal matrix sandwich composite : Compressive properties and strain rate effects. In: Materials Science and Engineering A. 2015 ; Vol. 643. pp. 156-168.
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