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

Blanco Ibáñez, Sergio and Goicolea Ruigómez, José María and Polindara López, Cesar Andrés (2011). A robust numerical framework for the analysis of material failure of fibre reinforced soft tissue. In: "18th Congress of the European Society of Biomechanics", 01/07/2012 - 04/07/2012, Lisboa, Portugal. p. 28.

Description

Title: A robust numerical framework for 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: Presentation at Congress or Conference (Poster)
Event Title: 18th Congress of the European Society of Biomechanics
Event Dates: 01/07/2012 - 04/07/2012
Event Location: Lisboa, Portugal
Title of Book: Proceedings of the18th Congress of the European Society of Biomechanics
Date: 2011
Subjects:
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: 12711
DC Identifier: http://oa.upm.es/12711/
OAI Identifier: oai:oa.upm.es:12711
Official URL: http://www.esbiomech2012.org/
Deposited by: Memoria Investigacion
Deposited on: 15 Nov 2012 10:37
Last Modified: 21 Apr 2016 11:59
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