Novel Isogeometric Analysis Based Automation of High-Fidelity Finite Element Analysis Model Creation from Computer Aided Design

Global Engineering and Materials, Inc. (GEM) along with its team member Carnegie Mellon University (CMU) propose to develop an isogeometric finite element model creation and analysis toolkit for Abaqus. The isogeometric analysis toolkit for Abaqus (IGAFA) will be developed by integrating existing computer aided design (CAD) software with a customized Abaqus toolkit for automatic model generation and response and failure prediction using a T-spline based geometry description. Polycube-based parametric mapping methods are used to build volumetric T-splines from B-Reps for CAD models of complex free-form surfaces. An unstructured all-hexahedral mesh is converted to T-spline volumes for their applications in isogeometric analysis. The IGAFA toolkit will feature 1) FEM model generation that retains exactly the original geometric description of the solid structure; 2) re-construction of Abaqus user-defined elements using the control points without remeshing; 3) reliable 3D stress/strain prediction using a user-defined high order function; 4) progressive failure evaluation in composite structures using accurate stress/strain predictors; and 5) visualization of stress concentration zones and performance of design alternations without user intervention. Verification and validation of both 3D stress analysis and failure prediction of a composite structure will be performed based on existing test data collected from team members.