A regularised continuum damage model based on the mesoscopic scale for soft tissue

Blanco Ibáñez, Sergio and Polindara López, Cesar Andrés and Goicolea Ruigómez, José María (2015). A regularised continuum damage model based on the mesoscopic scale for soft tissue. "International Journal of Solids and Structures", v. 58 ; pp. 20-33. ISSN 0020-7683. https://doi.org/10.1016/j.ijsolstr.2014.12.013.

Description

Title: A regularised continuum damage model based on the mesoscopic scale for soft tissue
Author/s:
  • Blanco Ibáñez, Sergio
  • Polindara López, Cesar Andrés
  • Goicolea Ruigómez, José María
Item Type: Article
Título de Revista/Publicación: International Journal of Solids and Structures
Date: April 2015
Volume: 58
Subjects:
Freetext Keywords: Constitutive modelling; Damage; Collagen; Fibril; Cross-link density
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Mecánica de Medios Continuos y Teoría de Estructuras
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Material properties of soft fibrous tissues are highly conditioned by the hierarchical structure of this kind of composites. Collagen based tissues present, at decreasing length scales, a complex framework of fibres, fibrils, tropocollagen molecules and amino-acids. Understanding the mechanical behaviour at nano-scale level is critical to accurately incorporate this structural information in phenomenological damage models. In this work we derive a relationship between the mechanical and geometrical properties of the fibril constituents and the soft tissue material parameters at macroscopic scale. A Hodge–Petruska two-dimensional model has been used to describe the fibrils as staggered arrays of tropocollagen molecules. After a mechanical characterisation of each of the fibril components, two fibril failures modes have been defined related with two planes of weakness. A phenomenological continuous damage model with regularised softening was presented along with meso-structurally based definitions for its material parameters. Finally, numerical analysis at fibril, fibre and tissue levels are presented to show the capabilities of the model

Funding Projects

TypeCodeAcronymLeaderTitle
Government of Spain2011-27609DPIUnspecifiedUnspecified

More information

Item ID: 41319
DC Identifier: http://oa.upm.es/41319/
OAI Identifier: oai:oa.upm.es:41319
DOI: 10.1016/j.ijsolstr.2014.12.013
Official URL: http://www.sciencedirect.com/science/article/pii/S0020768314004818
Deposited by: Memoria Investigacion
Deposited on: 23 Jun 2016 17:55
Last Modified: 30 May 2018 14:22
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