Geomiso TNL is a new both on-premises and cloud-based software, which delivers isogeometric analysis (IGA) and 3D design with splines. The combination of cloud computing and advanced refinement techniques constitutes a real game changer in CAD/CAE industry. Automatic mesh refinement has not been widely adopted in industry, because it requires access to the exact geometry. This hybrid program achieves seamless and automatic communication with CAD, thus mesh refinement utilizes the exact geometry, while cloud computing enables users to execute large-scale simulation experiments without the need for dedicated hardware.The Geomiso TNL software uses NURBS and T-splines to represent complicated multi-patch geometries and provides refinement schemes, such as knot insertion and order elevation, as in finite element analysis, and k-refinement, which is available only in IGA. T-splines, which permit local refinement, are very robust in their ability to efficiently sew together adjacent patches, thus facilitate solution of the gap problem of intersecting NURBS patches. Knot insertion is analogous to h-refinement, and knots are inserted without changing a curve geometrically or parametrically, while it splits existing elements into new ones. Order elevation, which is analogous to p-refinement, increases the polynomial order of the basis without changing the geometry or its parameterization, while the number of new control points depends on the multiplicity of the existing knots. The alternative k-refinement is potentially a superior approach to high-precision analysis than p-refinement. In T-splines, all local refinement is done on the control mesh on a single hierarchical level and all control points have similar influence on the geometry.Applications of refinement techniques on complicated geometric shapes are demonstrated with Geomiso TNL. It is proved that convergence and high-precision results are impossible without the exact geometry. A primary goal of this software is to be geometrically exact no matter how coarse the discretization is and to simplify refinement by eliminating the need for communication with the CAD model once the initial mesh is constructed. This new hybrid program makes refinement available via cloud to everyone through their browser.
A new software, Geomiso TNL, is proposed to facilitate the use of isogeometric analysis and 3D design with NURBS and T-splines. Its dual nature eliminates geometric errors by merging geometric design with mesh generation into a single procedure. It is based on the isogeometric method, the powerful generalization of the traditional finite element method. This paper presents four sample applications in non-linear solid and structural mechanics. This software is seen to handle these situations remarkably well, as the numerical examples exhibit significantly improved accuracy of the results, such as displacement, strain and stress fields, and reduced computational cost when compared with finite element analysis. It is argued that Geomiso TNL is a new, more efficient, alternative to finite element software packages and possesses several advantages.
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