ACMD Seminar: Isogeometric Analysis: Fundamentals, Challenges, and Current Research Thrusts

John Evans
Associate Professor, Aerospace Engineering Sciences, University of Colorado - Boulder

Tuesday, February 7, 2023, 1:00-2:00 PM MT (3:00-4:00 PM ET)

A video of this talk will be made available to NIST staff in the Math channel on NISTube, which is accessible from the NIST internal home page. It will be taken down from NISTube after 12 months at which point it can be requested by emailing the ACMD Seminar Chair.

Abstract: Isogeometric Analysis (IGA) has emerged over the past two decades as an important and powerful design-through-analysis methodology based on a synthesis of Computer Aided Geometry (CAD) and Finite Element Analysis (FEA) technologies.  IGA, introduced in the FEA community, establishes a fundamental link with CAD geometry by using the geometric basis directly as the basis for analysis.  Consequently, the finite element mesh is an exact representation of the geometry in IGA.  This approach has the potential to entirely eliminate geometry clean-up, feature removal steps, and traditional mesh generation.  Indeed, a prime motivation for the development of IGA is to simplify the process of building detailed analysis models for complex engineering systems from CAD representations, a major bottleneck in the overall engineering process.  However, IGA has also been observed to provide more accurate and robust numerical results than FEA in a wide range of application areas, including fluids and turbulence, fluid-structure interaction, structural and vibration analysis, plates and shells, and large deformation structural analysis.  In this talk, I will explore the fundamentals of IGA, present obstacles to its widespread adoption as an alternative to classical FEA, and discuss current research activities aiming to overcome these obstacles.

Bio: John Evans is an Associate Professor and the Jack Rominger Faculty Fellow in the Ann and H.J. Smead Department of Aerospace Engineering Sciences at the University of Colorado Boulder.  His research interests lie at the intersection of computational mechanics, geometry, and approximation theory, with current thrusts in isogeometric analysis, immersogeometric analysis, interactive simulation, and data-driven modeling.  He has won a number of awards for his research and teaching including the 2021 Gallagher Young Investigator Award from the United States Association for Computational Mechanics and the 2021 AIAA Rocky Mountain Educator of the Year (College/University), and he is currently Associate Editor of the journal Engineering with Computers.

Host: Zach Grey

Note: This talk will be recorded to provide access to NIST staff and associates who could not be present to the time of the seminar. The recording will be made available in the Math channel on NISTube, which is accessible only on the NIST internal network. This recording could be released to the public through a Freedom of Information Act (FOIA) request. Do not discuss or visually present any sensitive (CUI/PII/BII) material. Ensure that no inappropriate material or any minors are contained within the background of any recording. (To facilitate this, we request that cameras of attendees are muted except when asking questions.)

Note: Visitors from outside NIST must contact Lochi Orr (301) 975-3800; at least 24 hours in advance.