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Photoelastic Stress Response of Complex 3D-Printed Particle Shapes

journal contribution
posted on 2021-01-01, 00:00 authored by Negin AminiNegin Amini, Joshua Tuohey, John LongJohn Long, Jun Zhang, David Morton, Karen Daniels, Farnaz Fazelpour, Karen HapgoodKaren Hapgood
Stress visualization within 3-dimensional particles undergoing dynamic processes can greatly advance our understanding of complex particle behaviors. Traditional photoelastic stress visualization methods suffer inherent limitations from lack of available technology for complex particle production. Recently, 3D-printing has created new possibilities for enhancing the scope of stress analysis within physically representative granules. Here, we investigate opportunities offered by 3D-printing a granular material with photoelastic properties. We report the results of X-ray computed tomography and 3D-printing, combined with traditional photoelastic analysis, to visualize strain exhibited within simple discs to reproduced coffee beans. We find that the choice of print layer orientation with respect to the force load affects the optical properties of the discs, without a significant difference in their mechanical properties. Furthermore, we present a first, semi-quantified, measurement of stresses within 3D-printed particles of complex shape. The promising data shows potential for applying this method to complex assemblies of 3-dimensional particles.

History

Journal

AIChE Journal Open Research

Pagination

1-7

Location

Hoboken, N.J.

Language

eng

Publication classification

CN Other journal article

Publisher

Authorea, Inc.

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