A quasi-brittle continuum damage finite element model of the human proximal femur based on element deletion.
In this paper, a simple and practical finite element (FE) model coupled to a quasi-brittle damage law to describe the initiation and progressive propagation of multiple cracks based on element deletion is developed to predict the complete force-displacement curve and the fracture pattern of a human...
| Publicado en: | Medical & Biological Engineering & Computing Vol. 51; no. 1/2; pp. 219 - 232 |
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| Formato: | research Journal Article |
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Springer Nature
Feb2013
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104068504&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104068504 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: Feb2013 vid: 51 iid: 1/2 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 104068504 NLM23179412 2012019400 10.1007/s11517-012-0986-5 NLM23179412 104068504 ppf: 219 ppct: 13 formats: fmt: @attributes: type: P tig: atl: A quasi-brittle continuum damage finite element model of the human proximal femur based on element deletion. aug: au: Hambli, Ridha affil: Prisme Institute, MMH, 8, Rue Leonard de Vinci, 45072, Orleans cedex 2, France, ridha.hambli@univ-orleans.fr. sug: subj: Femur Pathology Finite Element Analysis Models, Biological Kinematics Computer Simulation Femoral Fractures Pathology Femoral Fractures Radiography Femur Radiography Male Middle Age Stress, Mechanical Tomography, X-Ray Computed Middle Aged: 45-64 years Male ab: In this paper, a simple and practical finite element (FE) model coupled to a quasi-brittle damage law to describe the initiation and progressive propagation of multiple cracks based on element deletion is developed to predict the complete force-displacement curve and the fracture pattern of a human proximal femur under quasi-static load. The motivation of this work was to propose a FE model for possible clinical use with a good compromise between complexity and capability of the simulation. The model considers a limited number of parameters that can predict proximal femur fracture in more adequate physical terms than criteria-based fracture models. Based on experimental results, different damage laws for cortical and trabecular bone are proposed to describe inelastic damage accumulation under excessive load. When the damage parameter reaches its critical value inside an element of the mesh, its stiffness matrix is set to zero, leading to the redistribution of the stress state in the vicinity of the damaged zone (crack initiation). Once a crack is initiated, the propagation direction is simulated by the propagation of the broken elements of the mesh. To illustrate the potential of the proposed approach, the left femur of a male (age 61) previously investigated by Keyak and Falkinstein (Model B: male, age 61) was simulated till complete fracture under one-legged stance quasi-static load. The proposed finite element model leads to more physical results concerning the shape of the force-displacement curve (yielding and fracturing) and the profile of the fractured edge. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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