Deformation and fracture of echinoderm collagen networks

Markus Ovaska, Zsolt Bertalan, Amandine Miksic, Michela Sugni, Cristiano Di Benedetto, Cinzia Ferrario, Livio Leggio, Luca Guidetti, Mikko J. Alava, Caterina A M La Porta*, Stefano Zapperi

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

11 Sitaatiot (Scopus)
159 Lataukset (Pure)

Abstrakti

Collagen networks provide the main structural component of most tissues and represent an important ingredient for bio-mimetic materials for bio-medical applications. Here we study the mechanical properties of stiff collagen networks derived from three different echinoderms and show that they exhibit non-linear stiffening followed by brittle fracture. The disordered nature of the network leads to strong sample-to-sample fluctuations in elasticity and fracture strength. We perform numerical simulations of a three dimensional model for the deformation of a cross-linked elastic fibril network which is able to reproduce the macroscopic features of the experimental results and provide insights into the internal mechanics of stiff collagen networks. Our numerical model provides an avenue for the design of collagen membranes with tunable mechanical properties.

AlkuperäiskieliEnglanti
Sivut42-52
Sivumäärä11
JulkaisuJournal of the Mechanical Behavior of Biomedical Materials
Vuosikerta65
DOI - pysyväislinkit
TilaJulkaistu - 1 tammikuuta 2017
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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