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

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

Descripción

Título: A robust numerical framework for the analysis of material failure of fibre reinforced soft tissue
Autor/es:
  • Blanco Ibáñez, Sergio
  • Goicolea Ruigómez, José María
  • Polindara López, Cesar Andrés
Tipo de Documento: Ponencia en Congreso o Jornada (Póster)
Título del Evento: 18th Congress of the European Society of Biomechanics
Fechas del Evento: 01/07/2012 - 04/07/2012
Lugar del Evento: Lisboa, Portugal
Título del Libro: Proceedings of the18th Congress of the European Society of Biomechanics
Fecha: 2011
Materias:
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

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.

Más información

ID de Registro: 12711
Identificador DC: http://oa.upm.es/12711/
Identificador OAI: oai:oa.upm.es:12711
URL Oficial: http://www.esbiomech2012.org/
Depositado por: Memoria Investigacion
Depositado el: 15 Nov 2012 10:37
Ultima Modificación: 21 Abr 2016 11:59
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