Исследовательская роль программ CAE в сквозных технологиях CAD/CAE/CAM

В работе проанализирован опыт использования программ САЕ в составе комплексов CAD/CAE/CAM. CAE-системы позиционированы как современный инструмент для выполнения вычислительных экспериментов при решении различных исследовательских и проектных задач в машиностроении. Приведены примеры использования компьютерных инструментов CAE в прикладных исследованиях, направленных на поиск новых технических решений, конструкций и технологий.The application of CAE software in CAD/CAE/CAM technologies was analysed. The CAE programs are positioned as research instrument for various investigations and simulations of machine projects. Some examples of CAE use for search of new technical solutions, structures and technologies are given

Enhanced FEM-based Modeling of Brain Shift Deformation in Image-Guided Neurosurgery

We consider the problem of improving outcomes for neurosurgery patients by enhancing intraoperative navigation and guidance. Current navigation systems do not accurately account for intraoperative brain deformation. We focus on the brain shift deformation that occurs just after the opening of the skull and dura. The heart of our system is a nonrigid registration technique using a biomechanical model. We specifically work on two axes: the representation of the structures in the biomechanical model and the evaluation of the surface landmark displacement fields between intraoperative MR images. Using the modified Hausdorff distance as an image similarity measure, we demonstrate that our approach significantly improves the alignment of the intraoperative images. ' 2009 Elsevier B.V. All rights reserved

Analysis of several biomechanical models for the simulation of lamb liver behaivour using similarity coefficients from medical image

In this study, six biomechanical models for simulating lamb liver behaviour are presented. They are validated using similarity coefficients from Medical Image on reconstructed volumes from computerised tomography images. In particular, the Jaccard and Hausdorff coefficients are used. Loads of 20 and 40 g are applied to the livers and their deformation is simulated by means of the finite element method. The models used are a linear elastic model, a neo-Hookean model, a Mooney¿Rivlin model, an Ogden model, a linear viscoelastic model and a viscohyperelastic model. The model that provided a behaviour that is closest to reality was the viscohyperelastic model, where the hyperelastic part was modelled with an Ogden model.This project has been partially funded by MITYC (reference TSI-020100-2009-189), by CDTI (reference IDI-20101153) and by MICINN (reference TIN2010-20999-C04-01). 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