Generation of a finite element MESH from stereolithography (STL) files

Béchet, Éric; Cuillière, Jean-Christophe; Trochu, F.

doi:10.1016/s0010-4485(00)00146-9

Cited by 105 publications

(57 citation statements)

References 7 publications

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“…First, the geometrical data of each blade were captured, exploiting the 3D scanner's functionalities, as well as its software tools in order to produce a primary stereo-lithography (STL) file. As a second step, compatible utilities were used to pre-process the initial raw model in order to create the final STL file of the digitized geometry, before designing the CAD surfaces [6,[24][25][26]. Next, in order to produce the initial CAD model, a segmentation of the triangulated STL model and NURBS (Non-uniform Rational B-Splines) surface fitting, were applied.…”

Section: Digitization and Cad Model Of The Steam Turbinementioning

confidence: 99%

Finite Element Model Developed and Modal Analysis of Large Scale Steam Turbine Rotor: Quantification of Uncertainties and Model Updating

Giagopoulos¹,

Αραϊλόπουλος²,

Zacharakis³

et al. 2017

Proceedings of the 2nd International Conference on Uncertainty Quantification in Computational Sciences and Engineering (UNCECO

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Section: Digitization and Cad Model Of The Steam Turbinementioning

confidence: 99%

Finite Element Model Developed and Modal Analysis of Large Scale Steam Turbine Rotor: Quantification of Uncertainties and Model Updating

Giagopoulos¹,

Αραϊλόπουλος²,

Zacharakis³

et al. 2017

Proceedings of the 2nd International Conference on Uncertainty Quantification in Computational Sciences and Engineering (UNCECO

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“…Several research investigations have been carried out to improve CAD/CAE integration: (i) simplification of a CAD model through the elimination of its small details in order to perform a FE analysis [2], (ii) generation of a Finite Element Mesh from Stereolithography (STL) files [3], and (iii) the iso-geometric analysis method [4]. The latter approach deals with generating a deformed solid model, which is the focus of this paper.…”

Section: Cad/cae Integrationmentioning

confidence: 99%

CAD/CAE integration: updating the CAD model after a FEM analysis

Louhichi¹,

Abenhaim²,

Tahan³

2014

Int J Adv Manuf Technol

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The improvement of the simulation process requires an integration of the design and analysis models. There are two essential tasks in the design analysis process: (i) Computer Aided Design (CAD) which provides the geometric description of the model and (ii) the Finite Element Method (FEM) used for mechanical behaviour simulations. The interoperability between these two tasks reduces costs and improves product quality through the acceleration of design analysis loops. Our activity fits into this research orientation by providing a method to link the FE analysis and the CAD model. This is done by reconstructing the CAD model from the FE analysis results (deformed mesh). This paper proposes a method to update the CAD geometry from the deformed mesh. This approach allows for rebuilding the CAD model after analysis by extracting geometric information from the deformed mesh. An illustration of the developed method is discussed at the end of this paper.

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“…Meshlab reads the OBJ file format exported from Chimera and exports the filtered molecular surface in STL file format, which is native to the stereolithography CAD software created by 3D Systems, Inc., Rock Hill, SC. The resulting STL file from Meshlab is imported to the commercially available Finite Element Analysis program ADINA (ADINA R&D, Inc., Watertown, MA), which is used to generate the 3D FE volume mesh consisting of 4-node tetrahedral finite elements [37]. If mesh repair is impossible using Meshlab, then the EMDB entry is classified as "failed in molecular surface repair" and no further analysis is performed (45 entries, Table S1).…”

Section: Molecular Surface Computation and Discretizationmentioning

confidence: 99%

Conformational dynamics of supramolecular protein assemblies

Kim

Nguyen

Bathe

2011

Journal of Structural Biology

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Supramolecular protein assemblies including molecular motors, cytoskeletal filaments, chaperones, and ribosomes play a central role in a broad array of cellular functions ranging from cell division and motility to RNA and protein synthesis and folding. Single-particle reconstructions of such assemblies have been growing rapidly in recent years, providing increasingly high resolution structural information under native conditions. While the static structure of these assemblies provides essential insight into their mechanism of biological function, their dynamical motions provide additional important information that cannot be inferred from structure alone. Here we present an unsupervised computational framework for the analysis of high molecular weight assemblies and use it to analyze the conformational dynamics of structures deposited in the Electron Microscopy Data Bank. Protein assemblies are modeled using a recently introduced coarse-grained modeling framework based on the finite element method, which is used to compute equilibrium thermal fluctuations, elastic strain energy distributions associated with specific conformational transitions, and dynamical correlations in distant molecular domains. Results are presented in detail for the ribosome-bound termination factor RF2 from Escherichia coli, the nuclear pore complex from Dictyostelium discoideum, and the chaperonin GroEL from E. coli. Elastic strain energy distributions reveal hinge-regions associated with specific conformational change pathways, and correlations in collective molecular motions reveal dynamical coupling between distant molecular domains that suggest new, as well as confirm existing, allosteric mechanisms. Results are publically available for use in further investigation and interpretation of biological function including cooperative transitions, allosteric communication, and molecular mechanics, as well as in further classification and refinement of electron microscopy based structures.

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Generation of a finite element MESH from stereolithography (STL) files

Cited by 105 publications

References 7 publications

Finite Element Model Developed and Modal Analysis of Large Scale Steam Turbine Rotor: Quantification of Uncertainties and Model Updating

Finite Element Model Developed and Modal Analysis of Large Scale Steam Turbine Rotor: Quantification of Uncertainties and Model Updating

CAD/CAE integration: updating the CAD model after a FEM analysis

Conformational dynamics of supramolecular protein assemblies

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