Workshop on Mathematical Analysis for Nonlinear Phenomena


This workshop focuses on mathematical models of various phenomena occurring in nature, as well as their applications in engineering and industry, and the corresponding mathematical analysis. The workshop will feature presentations primarily by young researchers, including talks on the latest research results, as well as survey lectures on introductory and foundational topics related to the themes above. The event aims to foster a flexible style of presentation that encourages active discussions among participants. We hope this will provide an opportunity to explore new research avenues in the mathematical analysis of phenomena. We look forward to your participation.

The details of the 22nd Workshop on Mathematical Analysis for Nonlinear Phenomena are as follows:

  • Speaker:  Sundararajan Natarajan (Indian Institute of Technology Madras)
  • Title of Talk:  New frontiers in integrating CAD and Engineering Analysis
  • Date and Time:   Monday, March 24, 2025, 15:30-16:30
  • Venue:   Shiinoki Cultural Complex (しいのき迎賓館), 2nd Floor, Garden Room (ガーデンルーム)
  • Address:  2-chōme-1-1 Hirosaka, Kanazawa City, Ishikawa Prefecture 920-0962
The past workshops can be found here.

New frontiers in integrating CAD and Engineering Analysis

speaker
Sundararajan Natarajan
Department of Mechanical Engineering
Indian Institute of Technology Madras
Chennai 600036, India

Abstract

For an efficient engineering design process, a seamless integration of computer aided design (CAD) and numerical analysis is crucial. Various numerical methods are used in engineering analysis, among which the finite element method (FEM) is the most prominent. This method relies heavily on a mesh structure, and the generation of this mesh generation accounts for about 80% of a typical analysis time for practical engineering problems. Various ideas have been proposed in the literature to avoid these problems by either simplifying this mesh generation process, or relaxing some of the constraints associated with the very presence of a mesh. This talk aims to present an overview of the recent advances in this direction of the most versatile and prominent approaches to overcome the mesh burden in computational science, namely: (a) Iso-geometric analysis whose focus is to closely tie the geometry, i.e. CAD data to the analysis; (b) the extended/generalized FEM (X/GFEM) where one of the aims is to increase the independence between the problem solved and the mesh. These methods are particularly attractive as they afford the modelling of crack propagation without re-meshing. Inclusions and holes as well as the domain boundary can also be treated independently of the mesh; (c) Strain smoothing in finite elements allows decreasing the negative effects of mesh distortion, (d) polygonal finite element method where the constraint on the mesh topology is relaxed and (e) scaled boundary finite element method - a semi-analytical method.