Mesh-independent damage model for trabecular bone fracture simulation and experimental validation.
| Autor: | Do XN; LEM3, Université de Lorraine - CNRS - Arts et Métiers Paristech, Metz Cedex, France., Hambli R; INSA CVL, LaMé, Université d'Orléans, Université de Tours, Orléans, France., Ganghoffer JF; LEM3, Université de Lorraine - CNRS - Arts et Métiers Paristech, Metz Cedex, France. |
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| Jazyk: | angličtina |
| Zdroj: | International journal for numerical methods in biomedical engineering [Int J Numer Method Biomed Eng] 2021 Jun; Vol. 37 (6), pp. e3468. Date of Electronic Publication: 2021 May 04. |
| DOI: | 10.1002/cnm.3468 |
| Abstrakt: | We propose in this study a two-dimensional constitutive model for trabecular bone combining continuum damage with embedded strong discontinuity. The model is capable of describing the three failure phases of trabecular bone tissue which is considered herein as a quasi-brittle material with strains and rotations assumed to be small and without viscous, thermal or other non-mechanical effects. The finite element implementation of the present model uses constant strain triangle (CST) elements. The displacement jump vector is implicitly solved through a return mapping algorithm at the local (finite element) level, while the global equilibrium equations are dealt with by Newton-Raphson method. The performance, accuracy and applicability of the proposed model for trabecular bone fracture are evaluated and validated against experimental measurements. These comparisons include both global and local aspects through numerical simulations of three-point bending tests performed on 10 single bovine trabeculae in the quasi-static regime. (© 2021 John Wiley & Sons Ltd.) |
| Databáze: | MEDLINE |
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