Acoustical and optical determination of mechanical properties of inorganically-bound foundry core materials

Philipp Lechner, Georg Fuchs, Christoph Hartmann, Florian Steinlehner, Florian Ettemeyer, Wolfram Volk

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Inorganically-bound sand cores are used in many light-metal foundries to form cavities in the cast part, which cannot be realised by the mould itself. To enable FEM simulations with core materials, their mechanical properties have to be measured. In this article, we adapt methods to determine the Young's and shear modulus, the Poisson ratio and the fracture strain of sand cores. This allows us to fully parametrise an ideal brittle FEM model. We found that the Young's and shear modulus can be obtained acoustically via the impulse excitation technique. The fracture strain was measured with a high-speed camera and a digital image correlation algorithm.

Original languageEnglish
Article number2531
JournalMaterials
Volume13
Issue number11
DOIs
StatePublished - 1 Jun 2020

Keywords

  • 3-point-bending
  • Elastic properties
  • Fracture strain
  • Fracture strength
  • Inorganic sand core materials
  • Poisson's number
  • Shear modulus
  • Water-glass
  • Young's modulus

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