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dc.contributor.authorPeña, Estefanía
dc.contributor.authorSáez, Pablo
dc.contributor.authorDoblaré, Manuel
dc.contributor.authorMartínez, Miguel A.
dc.identifier.citationPeña, E. [et al.]. A microstructural approach to modelling inelastic effects in fibred biological tissues. A: COMPLAS XI. "COMPLAS XI : proceedings of the XI International Conference on Computational Plasticity : fundamentals and applications". CIMNE, 2011, p. 700-712.
dc.description.abstractEnormous progress has been made during recent years in the phenomenological modelling of soft tissue. In general, three important softening phenomena associated with biological tissues may be distinguished. First, there is the dependence of the mechanical response on the previously attained maximum load level. This is quite similar to the well-known Mullins effect in rubber-like materials. Another typical phenomenon known as permanent set is characterized by residual strains after unloading. Finally, there is the softening behaviour resulting from fibre rupture and matrix disruption associated with material damage. There are several phenomenological constitutive models able to describe the failure of soft tissues from a macroscopic point of view. In this contribution a three-dimensional micro-sphere-based constitutive model for anisotropic fibrous soft biological tissue is presented, including elastic anisotropy as well as inelastic effects (softening, preconditioning and damage). The link between micro-structural inelastic contribution of the collagen fibers and macroscopic response is achieved by means of computational homogenization, involving numerical integration over the surface of the unit sphere. In order to deal with the random distribution of the fibrils within the fiber, a von Mises probability function is incorporated, and the mechanical behavior of the fibrils is defined by an exponential-type model. The inelastic effects in soft biological tissues were modeled by internal variables that characterize the structural state of the material.
dc.format.extent13 p.
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits
dc.subject.lcshFinite element method
dc.subject.lcshPlasticity -- Mathematical models
dc.subject.otherSoft tissue, Microsphere, Affine deformations, damage and blood vessels
dc.titleA microstructural approach to modelling inelastic effects in fibred biological tissues
dc.typeConference report
dc.subject.lemacElements finits, Mètode dels
dc.subject.lemacPlasticitat -- Models matemàtics
dc.rights.accessOpen Access
local.citation.contributorCOMPLAS XI
local.citation.publicationNameCOMPLAS XI : proceedings of the XI International Conference on Computational Plasticity : fundamentals and applications

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