Acoustical and Optical Determination of Mechanical Properties of Inorganically-Bound Foundry Core Materials

Materials

Georg Fuchs¹  Christoph Hartmann¹  Florian Steinlehner¹  Philipp Lechner¹  Wolfram Volk¹  Florian Ettemeyer² 

[1] Chair of Metal Forming and Casting, Technical University of Munich, Walther-Meissner-Strasse 4, 85748 Garching, Germany;Fraunhofer Research Institute for Casting, Composite and Processing Technology IGCV, Walther-Meissner-Strasse 4, 85748 Garching, Germany;

关键词: inorganic sand core materials;    elastic properties;    fracture strength;    fracture strain;    water-glass;    3-point-bending;   

DOI  :  10.3390/ma13112531

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown