Crack bridging modelling in Bioglass® based scaffolds reinforced by polyvinyl alcohol / microfibrillated cellulose composite coating
March 26-31, 2017
This work deals with crack bridging modelling in Bioglass® based scaffolds due the presence of a special polymer coating. This includes a careful modelling of the scaffold which is based on x-ray computed micro-tomography (micro-CT) scans and identification of bridging mechanism with the aid of extensive fractographic observations of coated, broken struts. A replacement of the real structure of scaffold by a periodic model utilizing Kelvin cell whose size corresponds to the mean cell size of the real foam is
discussed. The struts of the idealized foam are modelled using the beam elements. A detailed computational analysis of crack bridging due to coating film fibrils under plane strain conditions is presented and an improvement of fracture resistance of coated scaffolds is explained.
Luca Bertolla, Ivo Dlouhý, Michael Kotoul, Petr Marcian, Petr Skalka, Oldrich Sevecek, James Mertens, and Nikilesh Chawla, "Crack bridging modelling in Bioglass® based scaffolds reinforced by polyvinyl alcohol / microfibrillated cellulose composite coating" in "Syntactic and Composite Foams V", Gary M. Gladysz (Empyreus Solutions, LLC, USA) Krishan K. Chawla (University of Alabama at Birmingham, USA) Aldo R. Boccaccini (University of Erlangen-Nuremberg, Germany) Manabu Fukushima (National Institute of Advanced Industrial Science and Technology (AIST), Japan) Eds, ECI Symposium Series, (2017). http://dc.engconfintl.org/syntactic_composite_foams_v/9