Reference : Towards a seamless Integration of CAD and Simulation: CISM Course 2017
Learning materials : Course notes
Engineering, computing & technology : Multidisciplinary, general & others
Towards a seamless Integration of CAD and Simulation: CISM Course 2017
Bordas, Stéphane mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
International Centre for Mechanical Sciences - Centre International des Sciences Mécaniques, Udine, Italy
International Centre for Mechanical Sciences Advanced Courses - Centre International des Sciences Mécaniques, Udine, Italy
[en] CAD ; IGA ; GIFT ; geometry independent field approximation ; fracture mechanics ; shape optimisation ; error estimation
[en] Isogeometric analysis relies on the use of the same basis functions as employed in Computer Aided Design (CAD). This offers the possibility to facilitate design and optimisation. The previous course “Isogeometric methods for numerical simulation” held in 2013 had the aim to give an introduction to isogeometric analysis, its advantages, drawbacks and to the range of its applications.
The aim of the proposed new course will be different. The focus will be more on the connection of simulation to CAD systems and how CAD data can be used directly for simulation, leading to a seamless integration. An overview of recent advances and applications will be also presented. The course will start with an introduction to NURBS and their use in describing geometry and in simulation. This will be followed by lectures from a CAD vendor describing the current state of development. Currently available connections to simulation software will also be discussed.
Next the use of NURBS for 3D structural analysis, structural optimisation and damage tolerance assessment will be presented, including such advanced topics as the treatment of discontinuities and real-time solvers. It will also be discussed when it might be advantageous to decouple the boundary discretisation from the field variable discretisation, in particular in shape optimisation. Isogeometric methods for the analysis of beam and shell structures, including shape optimisation and fluid structure interaction, will be presented.
Lectures on the mathematical and algorithmic foundations of analysis-suitable geometry will follow. This includes an introduction to T-splines and multilevel spline schemes such as hierarchical B- splines. Common analysis-suitable spline algorithms will be presented in the context of Bézier extraction and projection as well as its application as a foundation for integrated engineering design and analysis. An important aspect of analysis-suitable geometry is the ability to locally adapt the smooth spline basis. Several common refinement algorithms will be reviewed as well as their application in several demanding areas of application. The emerging area of weak geometry will be introduced as well as its application to the rapid construction of complex structural assemblies.
With the rapid development of isogeometric analysis in recent years, there is an urgent need for volumetric parameterization such as volumetric T-spline model construction. Several volumetric T- spline modeling techniques, that were developed in recent years will be presented. They include converting any quad/ hex meshes to standard and rational T-splines, polycube-based parametric mapping, feature preservation using eigenfunctions, Boolean operations and skeletons, truncated hierarchical Catmull-Clark subdivision, weighted T-splines, conformal T-spline modeling, as well as incorporating T-splines into commercial CAD and FEA software, will be presented.
The target audience will be engineers, interested in simulation, software developers and researchers.
Department of Computational Engineering Sciences
Researchers ; Professionals ; Students ; General public ; Others
FP7 ; 279578 - REALTCUT - Towards real time multiscale simulation of cutting in non-linear materials with applications to surgical simulation and computer guided surgery
FnR ; FNR8813215 > Stéphane Bordas > CBM > Computational Biomechanics For Medicine: Beyond The Frontiers Of Mechanics > 01/03/2015 > 31/12/2016 > 2014

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UDINE_2017_introduction.pdfIntroductionPublisher postprint16.6 MBView/Open
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UDINE_2017_dicontinuities.pdfDiscontinuitiesPublisher postprint16.45 MBView/Open
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UDINE_2017_Nitsche.pdfNitsche's methodPublisher postprint4.92 MBView/Open
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UDINE_2017_IGABEM_CRACKS.pptxIGABEM Cracks and OptimisationPublisher postprint7.15 MBView/Open
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UDINE_2017_PARAMETRISATION.pdfParameterisation in isogeometric analysisPublisher postprint12.15 MBView/Open
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2017_UDINE_GIFT.pdfGeneralizing IGA: the Geometry Independent Field approximaTion (GIFT)Publisher postprint3.72 MBView/Open
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CFRAC17_PIERARD_Presentation.zipError estimation for 3D crack propagation LaTeX SourcesPublisher postprint21.69 MBView/Open
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XDMS_2017_AGATHOS_Presentation.zipConditioning of enriched finite element matrices for fracturePublisher postprint23.8 MBView/Open
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XDMS_2017_Bordas_AverageResolution_withLinks.pdfAdvances in Enriched Methods for Engineering and MedicinePublisher postprint24.83 MBView/Open
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IGA_Enrichment_Phu.keyError estimation in finite elementsPublisher postprint19.44 MBView/Open
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UDINE_2017_ErrorEstimationShortCourseNotes.pdfError estimation in finite elementsPublisher postprint833.75 kBView/Open
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UCLworkshop.rarWell-conditioned XFEM and level sets for fracturePublisher postprint9.57 MBView/Open
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UDINE_2017_ModelOrderReduction.pdfModel order reduction for fracture - homogenisation and proper orthogonal decompositionPublisher postprint31.01 MBView/Open

Additional material(s):

File Commentary Size Access
Open access
2017_GIFT_IGA_errorEstimation_Dynamics.pptGIFT for dynamics and error estimation10.38 MBView/Open
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GIFT_GeneralizingIGA_Weakening-tight-coupling.zipLaTeX sources for GIFT overview presentation10.49 MBView/Open
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GIFT_ShortIntroduction.zipGIFT Short introduction Sources7.18 MBView/Open
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nitsche-iga.zipNitsche IGA sources14.13 MBView/Open
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advanced-reduced-order.zipReduced order modelling and Nitsche LaTeX Sources20.18 MBView/Open
Open access
reduced-basis-nitsche.zipReduced basis and Nitsche for domain wise reduction LaTeX Sources6.86 kBView/Open
Private access
xfem_error_shortcourse_notes.zipError estimation in finite elements LaTeX sources82.53 MBRequest a copy
Open access
UDINE_2017_ShortCoursePDF_files_BORDAS.zipAll PDF files containing the course notes115.83 MBView/Open
Open access
UDINE_2017_CourseNotes_Powerpoint_BORDAS.zipAll Powerpoint slides in ppt format112.59 MBView/Open
Open access
UDINE_2017_CourseNotes_Keynote_BORDAS.zipKeynote sources246.83 MBView/Open
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UDINE_2017_handwrittenNotes_BORDAS.pptxHandwritten notes13.57 MBView/Open

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