Publication detail

Crack bridging modelling in Bioglass ®based scaffolds reinforced by poly-vinyl alcohol/microfibrillated cellulose composite coating

KOTOUL, M. SKALKA, P. ŠEVEČEK, O. BERTOLLA, L. MERTENS, J.MARCIÁN, P. CHAWLA, N.

English title

Crack bridging modelling in Bioglass ®based scaffolds reinforced by poly-vinyl alcohol/microfibrillated cellulose composite coating

Type

journal article in Web of Science

Language

en

Original abstract

The paper deals with crack bridging modelling in Bioglass ®based scaffolds due the presence of a spe- cial 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 computa- tional 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.

English abstract

The paper deals with crack bridging modelling in Bioglass ®based scaffolds due the presence of a spe- cial 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 computa- tional 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.

Keywords in English

Irregular foam structure; Voronoi tessellation; FEM; Polymer coating; Crack bridging

Released

19.04.2017

Publisher

Elsevier

ISSN

0167-6636

Volume

110

Number

1

Pages from–to

16–28

Pages count

13

BIBTEX


@article{BUT137250,
  author="Michal {Kotoul} and Petr {Skalka} and Oldřich {Ševeček} and Luca {Bertolla} and Petr {Marcián},
  title="Crack bridging modelling in Bioglass ®based scaffolds reinforced by poly-vinyl alcohol/microfibrillated cellulose composite coating",
  year="2017",
  volume="110",
  number="1",
  month="April",
  pages="16--28",
  publisher="Elsevier",
  issn="0167-6636"
}