Coreform Cubit 2021.11

Coreform IGA delivers faster overall time to solution with improved accuracy

Coreform isogeometric analysis (IGA) technology packs more solution accuracy into every element, giving you actionable results more quickly and at less cost

Greater accuracy

The superiority of smooth spline basis functions gives Coreform IGA greater accuracy per degree of freedom than traditional FEA.

1.2.1 Usplines

U-splines are a revolutionary new spline technology, developed by Coreform, and can be thought of as a generalization of B-splines, NURBS, and T-splines. A U-spline is created by first generating a linear mesh to define the spline’s topology, then prescribing the polynomial degrees of the elements and degree of smoothness with their neighboring elements, and then computing the resulting U-spline in Coreform Cubit. The generated U-spline can then be used as a watertight CAD geometry definition or as an accurate and computationally efficient mesh for a simulation, a technique known as Isogeometric Analysis (IGA).

1.2.2 Usplines: Initial support in ANSYS LS-Dyna

Bézier Extraction is an IGA/spline technology that transforms a spline into a traditional "element point of view" format that can be more readily implemented in traditional finite element codes. ANSYS LS-Dyna supports Bézier extraction via DYNA’s *IGA_INCLUDE_BEZIER keyword and the "BEXT" files that Coreform Cubit can export from a U-spline.