Virtual power based algorithm for decoupling large motions from infinitesimal strains: application to shoulder joint biomechanics.

Détails

ID Serval
serval:BIB_DCC3490C5C2C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Virtual power based algorithm for decoupling large motions from infinitesimal strains: application to shoulder joint biomechanics.
Périodique
Computer Methods in Biomechanics and Biomedical Engineering
Auteur(s)
Büchler P., Rakotomanana L., Farron A.
ISSN
1025-5842
Statut éditorial
Publié
Date de publication
12/2002
Peer-reviewed
Oui
Volume
5
Numéro
6
Pages
387-396
Langue
anglais
Notes
Publication types: Comparative Study ; Evaluation Studies ; Journal Article ; Validation Studies
Résumé
New trends of numerical models of human joints require more and more computation of both large amplitude joint motions and fine bone stress distribution. Together, these problems are difficult to solve and very CPU time consuming. The goal of this study is to develop a new method to diminish the calculation time for this kind of problems which include calculation of large amplitude motions and infinitesimal strains. Based on the Principle of Virtual Power, the present method decouples the problem into two parts. First, rigid body motion is calculated. The bone micro-deformations are then calculated in a second part by using the results of rigid body motions as boundary conditions. A finite element model of the shoulder was used to test this decoupling technique. The model was designed to determine the influence of humeral head shape on stress distribution in the scapula for different physiological motions of the joint. Two versions of the model were developed: a first version completely deformable and a second version based on the developed decoupling method. It was shown that biomechanical variables, as mean pressure and von Mises stress, calculated with the two versions were sensibly the same. On the other hand, CPU time needed for calculating with the new decoupled technique was more than 6 times less than with the completely deformable model.
Mots-clé
Algorithms, Computer Simulation, Elasticity, Finite Element Analysis, Humans, Models, Biological, Motion, Movement/physiology, Pressure, Quality Control, Rotation, Shoulder Joint/physiology, Stress, Mechanical
Pubmed
Création de la notice
28/01/2008 12:15
Dernière modification de la notice
20/08/2019 16:01
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