Archives

A Node-Based Uniform Strain Virtual Element Method for Elastoplastic Solids

  • January 9, 2024
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A talk given by A. Ortiz-Bernardin at COMPLAS 2023, September 6, 2023, Barcelona, Spain. A NODE-BASED UNIFORM STRAIN VIRTUAL ELEMENT METHOD FOR ELASTOPLASTIC SOLIDS A. ORTIZ-BERNARDIN a and Edoardo Artioli b Abstract. This work presents our recent advances on developing the extension of the node-based uniform strain virtual element method (NVEM) [1] to elastoplastic applications.

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A Node-Based Uniform Strain Virtual Element Method for Elastic and Inelastic Small Deformation Problems

  • December 16, 2022
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A talk given by A. Ortiz-Bernardin at CSFWGBC 2022, June 2, 2022, Ascona, Switzerland. A NODE-BASED UNIFORM STRAIN VIRTUAL ELEMENT METHOD FOR ELASTIC AND INELASTIC SMALL DEFORMATION PROBLEMS A. ORTIZ-BERNARDIN a Abstract. A combined nodal integration and virtual element method is presented for elastic and inelastic small deformation problems, wherein the strain is averaged at

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Accepted Paper: A node-based uniform strain virtual element method for compressible and nearly incompressible elasticity

  • December 16, 2022
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Paper Accepted for Publication in International Journal for Numerical Methods in Engineering A. Ortiz-Bernardin, R. Silva-Valenzuela, S. Salinas-Fernández, N. Hitschfeld-Kahler, S. Luza, B. Rebolledo, “A node-based uniform strain virtual element method for compressible and nearly incompressible elasticity” ABSTRACT We propose a combined nodal integration and virtual element method for compressible and nearly incompressible elasticity, wherein the strain is averaged at the

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A node-based uniform strain virtual element method for compressible and nearly incompressible elasticity

  • December 16, 2022
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International Journal for Numerical Methods in EngineeringVol. 124, No. 8, pp. 1818-1855, 2023 A. Ortiz-Bernardin, R. Silva-Valenzuela, S. Salinas-Fernández, N. Hitschfeld-Kahler, S. Luza, B. Rebolledo Abstract We propose a combined nodal integration and virtual element method for compressible and nearly incompressible elasticity, wherein the strain is averaged at the nodes from the strain of surrounding virtual elements. For the strain averaging

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Release of VEMLAB 2.4.1

  • June 27, 2022
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VEMLAB: a MATLAB library for the virtual element method   Release of VEMLAB 2.4.1 >>  From VEMLAB 2.4 to VEMLAB 2.4.1: Fix some bugs in create_polygonal_mesh.m Fix several bugs in the writing of output files. Affected functions:postprocess_numerical_solution_linelast2d.mwrite_solution_txt_linelast2d.mplot_numerical_solution_poisson2d.mpostprocess_numerical_solution_poisson2d.mwrite_solution_CPP_poisson2d.mwrite_solution_txt_poisson2d.mwrite_solution_GiD_poisson2d.m Optimize function T3toPolyMesh.m Browse and get the code

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Development and assessment of a combined nodal integration and virtual element method for small and large deformation solid mechanics simulations

  • June 20, 2022
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2022 – 2025 Principal Investigator: Alejandro Ortiz-Bernardin. Project funded by ANID-FONDECYT (Grant Nº 1221325) Nodal integration is a numerical integration scheme for Galerkin weak forms, where the weak form integrals are sampled at the nodes. In this type of scheme, state and history-dependent variables become nodal quantities and thus in nonlinear computations they are tracked only

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POLYLLA: polygonal meshing algorithm based on terminal-edge regions

  • June 18, 2022
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Engineering with Computers Vol. 38, No. 5, pp. 4545-4567, 2022 S. Salinas-Fernández, Nancy Hitschfeld-Kahler, A. Ortiz-Bernardin, Hang Si Abstract This paper presents an algorithm to generate a new kind of polygonal mesh obtained from triangulations. Each polygon is built from a terminal-edge region surrounded by edges that are not the longest-edge of any of the

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Release of VEMLAB 2.4

  • January 13, 2022
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VEMLAB: a MATLAB library for the virtual element method   Release of VEMLAB 2.4   >>  From VEMLAB 2.3 to VEMLAB 2.4: Add several options for in plot_and_output_options.m. New options: delete existing output files, plot front/isometric view of the figure, print and save pdf figures, save .fig figures, set figure resolution, color system for the

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Paper Published in the ICCS 2020: Convex polygon packing based meshing algorithm for modeling of rock and porous media

  • June 30, 2020
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Paper Accepted for Publication in ICCS 2020: Computational Science – ICCS 2020 J. Torres, N. Hitschfeld, R. O. Ruiz and A. Ortiz-Bernardin, “Convex Polygon Packing Based Meshing Algorithm for Modeling of Rock and Porous Media.” ABSTRACT In this work, we propose new packing algorithm designed for the generation of polygon meshes to be used for modeling

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