A robust numerical framework to the analysis of material failure of fibre reinforced soft tissue

Blanco Ibáñez, Sergio and Goicolea Ruigómez, José María and Polindara López, Cesar Andrés (2012). A robust numerical framework to the analysis of material failure of fibre reinforced soft tissue. "Journal of Biomechanics", v. 45 (n. 1); pp.. ISSN 0021- 9290. https://doi.org/10.1016/S0021-9290(12)70029-5.

Description

Title: A robust numerical framework to the analysis of material failure of fibre reinforced soft tissue
Author/s:
  • Blanco Ibáñez, Sergio
  • Goicolea Ruigómez, José María
  • Polindara López, Cesar Andrés
Item Type: Article
Título de Revista/Publicación: Journal of Biomechanics
Date: July 2012
ISSN: 0021- 9290
Volume: 45
Subjects:
Freetext Keywords: Numerical models; material failure; fibre reinforced soft tissues
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

In this work, robustness and stability of continuum damage models applied to material failure in soft tissues are addressed. In the implicit damage models equipped with softening, the presence of negative eigenvalues in the tangent elemental matrix degrades the condition number of the global matrix, leading to a reduction of the computational performance of the numerical model. Two strategies have been adapted from literature to improve the aforementioned computational performance degradation: the IMPL-EX integration scheme [Oliver,2006], which renders the elemental matrix contribution definite positive, and arclength-type continuation methods [Carrera,1994], which allow to capture the unstable softening branch in brittle ruptures. The IMPL-EX integration scheme has as a major drawback the need to use small time steps to keep numerical error below an acceptable value. A convergence study, limiting the maximum allowed increment of internal variables in the damage model, is presented. Finally, numerical simulation of failure problems with fibre reinforced materials illustrates the performance of the adopted methodology.

More information

Item ID: 20519
DC Identifier: http://oa.upm.es/20519/
OAI Identifier: oai:oa.upm.es:20519
DOI: 10.1016/S0021-9290(12)70029-5
Official URL: http://www.jbiomech.com/article/S0021-9290(12)70029-5/abstract
Deposited by: Memoria Investigacion
Deposited on: 04 Dec 2013 19:40
Last Modified: 21 Apr 2016 23:21
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