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

Blanco Ibáñez, Sergio; Polindara López, Cesar Andrés y Goicolea Ruigomez, 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.

Descripción

Título: A regularised continuum damage model based on the mesoscopic scale for soft tissue
Autor/es:
  • Blanco Ibáñez, Sergio
  • Polindara López, Cesar Andrés
  • Goicolea Ruigomez, José María
Tipo de Documento: Artículo
Título de Revista/Publicación: International Journal of Solids and Structures
Fecha: Abril 2015
Volumen: 58
Materias:
Palabras Clave Informales: Constitutive modelling; Damage; Collagen; Fibril; Cross-link density
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Mecánica de Medios Continuos y Teoría de Estructuras
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de España2011-27609DPISin especificarSin especificar

Más información

ID de Registro: 41319
Identificador DC: http://oa.upm.es/41319/
Identificador OAI: oai:oa.upm.es:41319
Identificador DOI: 10.1016/j.ijsolstr.2014.12.013
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0020768314004818
Depositado por: Memoria Investigacion
Depositado el: 23 Jun 2016 17:55
Ultima Modificación: 23 Jun 2016 17:55
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