Abstract

We report the successful manufacture of short fibre reinforced polymer composites via the process of ultrasonic assembly. An ultrasonic device is developed allowing the manufacture of thin layers of anisotropic composite material. Strands of unidirectional reinforcement are, in response to the acoustic radiation force, shown to form inside various matrix media. The technique proves suitable for both photoinitiator and temperature controlled polymerisation mechanisms. A series of glass fibre reinforced composite samples constructed in this way are subjected to tensile loading and the stress-strain response is characterised. Structural anisotropy is clearly demonstrated, together with a 43% difference in failure stress between principal directions. The average stiffnesses of samples strained along the direction of fibre reinforcement and transversely across it were 17.66 +/- 0.63 MPa and 16.36 +/- 0.48 MPa, respectively. (C) 2014 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)1015-1019
Number of pages5
JournalUltrasonics
Volume54
Issue number4
DOIs
Publication statusPublished - Apr 2014

Keywords

  • Discontinuous fibre composites
  • Mechanical properties
  • Acoustic radiation pressure
  • Particle manipulation
  • ACOUSTIC RADIATION FORCE
  • STANDING-WAVE FIELD
  • RIGID CYLINDER
  • PARTICLES
  • MANIPULATION
  • TRANSDUCER
  • EXCITATION
  • RESONATOR
  • MOTION
  • MODEL

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