Financial support through the DFG research training group PoreNet and the DAAD/Go8 Australia-Germany Joint Research Co-operation Scheme is thankfully acknowledged. Useful discussions with Arcady Dyskin, Elena Pasternak, Kamen Tushtev, Tina Kühn and Georg Grathwohl are gratefully appreciated. The authors would also like to thank Brett Williams of the School of Physics at Monash University, and Cristian Nuortila, University of Bremen, for machining the interlockable elements and the casting die.
Mechanical Properties of Topologically Interlocked Structures with Elements Produced by Freeze Gelation of Ceramic Slurries†
Article first published online: 25 JAN 2012
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Volume 14, Issue 5, pages 335–341, May 2012
How to Cite
Krause, T., Molotnikov, A., Carlesso, M., Rente, J., Rezwan, K., Estrin, Y. and Koch, D. (2012), Mechanical Properties of Topologically Interlocked Structures with Elements Produced by Freeze Gelation of Ceramic Slurries. Adv. Eng. Mater., 14: 335–341. doi: 10.1002/adem.201100244
- Issue published online: 8 MAY 2012
- Article first published online: 25 JAN 2012
- Manuscript Accepted: 27 DEC 2011
- Manuscript Received: 27 SEP 2011
- DFG research training group PoreNet
- DAAD/Go8 Australia-Germany Joint Research Co-operation Scheme
In the present paper, the force-fit connection of discrete ceramic components by means of geometrically interlocking surfaces is studied. These surfaces possess a concavo-convex topology permitting assembly of structures in which each individual element is kinematically locked by its neighbors. Such structures have a tuneable bending stiffness, allow for large deformations and are tolerant to missing or destroyed elements. These properties of topologically interlocked structures make them particularly attractive in construction with brittle materials. The elements used were produced by freeze gelation of ceramic slurries, leading to near net shape with the coefficient of shrinkage below 3%. It is shown that planar assemblies of interlocked ceramic elements can withstand flexural deflections up to a ten-fold of those a solid plate from the same material can sustain. The response of these structures to concentrated load can be divided into an elastic and a quasi-plastic, i.e., irreversible, part. After the point of maximum load, the interlocked structures investigated were still able to withstand further deformation, whereas solid plates showed brittle failure.