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dc.contributor.authorCortez, Sara Isabel Coutopor
dc.contributor.authorPinheiro, Manuelpor
dc.contributor.authorClaro, José Carlos Pimentapor
dc.contributor.authorAlves, J. L.por
dc.description.abstractFinite Element (FE) meshes are usually highly refined and dense and, consequently, computationally very expensive. Therefore, after the preliminary FE mesh generation, it is necessary to decrease its size by diminishing the total number of nodes and elements while maintaining both geometrical accuracy and a physically-meaningful FE mesh refinement. The aim of this work is to describe an optimized FE mesh simplification procedure based on edge contraction and on a user-defined spatial refinement gradient criterion. The main idea is that, for normal mechanical loadings applied to a motion segment, the vertebrae shall behave almost as an incompressible medium, and only the intervertebral disc (IVD) should undergo relevant strains. In this case, it is acceptable (and desirable) to attain a problem-functional FE mesh, in which the FE mesh should be more refined at the IVD and coarser at vertebrae. On the other hand, an optimized FE mesh should be more refined at the annulus fibrosus than at the nucleus pulposus. In summary, the proposed FE mesh generation and simplification procedure, being based on a user-definable spatial FE mesh refinement gradient, allows the user to define precisely the required refinement and thus to reduce drastically the number of elements in the final FE mesh and consequently to diminish the computation time required for the FE analysis, while keeping the necessary physical meaning on the FE mesh. The aforesaid procedure will be applied to the FE mesh generation (based on [1]) of a motion segment initially characterized by medical imaging.por
dc.relationNMP-2009-SMALL-3-CP-FP 246351por
dc.subjectIntervertebral segmentpor
dc.titleOptimized FE mesh generation procedure based on a user-defined spatial refinement gradient. Application to a motion segmentpor
oaire.citationConferencePlaceBerlin, Germanypor
oaire.citationTitleCMBBE - 10th International Symposium on Computer Methods in Biomechanics and Biomedicspor
dc.subject.fosEngenharia e Tecnologia::Engenharia Mecânicapor
sdum.conferencePublicationCMBBE - 10th International Symposium on Computer Methods in Biomechanics and Biomedicspor
Appears in Collections:CT2M - Publicações em atas de encontros científicos / Papers in conference proceedings

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