CAD-integrated Untrimmed Body-fit Unstructured Spline LS-DYNA Preprocessing for Isogeometric Analysis and Digital Twins

Isogeometric Analysis (IGA) has emerged as a next generation advancement in the field of Computer-Aided Engineering (CAE) and simulation thanks to its ability to utilize geometric representations native to Computer-Aided Design (CAD) models. Ansys LS-DYNA®’s proven capabilities for IGA have made it the premier solver for the technology. While the direct benefits for analysis are well documented, industrial adoption has been hampered by the difficulty in producing IGA-ready models from CAD data. Trimmed multi-patch IGA preprocessing approaches have seen advances at the industrial level but the desire for untrimmed body-fit unstructured splines has remained an unsolved approach in IGA preprocessing. In this paper, we discuss an IGA preprocessor for Ansys LS-DYNA® that not only produces untrimmed body-fit unstructured splines but does so in a process that is integrated directly into a CAD application.