Inverse Design of Nonlinear Phononic Metamaterials for Nonlinear Wave Cloaking — iNCMDAO 2024 Conference Paper (IISc Bangalore)

Prabhat Kumar</li><li><b>Co-Chair:</b> Sachin Singh Gautham</li><li><b>Format:</b> Solo presenter (single author)</li></ul><p dir="ltr"><b>Context and Significance:</b><br>This paper was presented in the <b>Topology Optimization track</b> in the <b>main hall of the J. N. Tata Auditorium</b> at IISc Bangalore — the flagship venue of the conference. The session was attended by leading international researchers in optimization and metamaterials, including:</p><p><br></p><ul><li><b>Prof.

Kalyanmoy Deb</b> (Michigan State University) — one of the most cited researchers globally in evolutionary multi-objective optimization</li><li><b>Prof. Ole Sigmund</b> (Denmark Technical University) — pioneer of topology optimization</li><li><b>Prof. Krishnan Suresh</b> (University of Wisconsin, Madison)</li><li><b>Prof.

Wei Chen</b> (Northwestern University)</li><li><b>Prof. Faez Ahmed</b> (MIT)</li><li><b>Prof. Sankaran Mahadevan</b> (Vanderbilt University)</li><li><b>Prof.

Gil Ho Yoon</b> (Hanyang University)</li><li><b>Prof. Prabhat Hajela</b> (Rensselaer Polytechnic Institute)</li><li><b>Prof. Roger A. Sauer</b> (Ruhr-Universität Bochum)</li><li><b>Prof.

Mathias Huesing</b> (RWTH-Aachen)</li><li><b>Prof. Burkhard Corves</b> (RWTH-Aachen)</li><li><b>Prof. Izabella Lubowiecka</b> (Gdańsk University of Technology)</li></ul><p dir="ltr">The paper was selected for presentation in the <b>prestigious main-hall session</b> of the conference, which featured only a select number of contributed papers alongside international keynote lectures and invited talks.

The presentation generated discussion and questions from senior researchers in the topology optimization community.</p><p dir="ltr"><b>Key Contributions:</b></p><ul><li>Multi-scaled elliptical hyperelastic inclusion model for nonlinear wave cloaking</li><li>Impedance-matched design to isolate nonlinear effects</li><li>Gradient-free inverse optimization framework using transient finite element models</li><li>Simultaneous control of inclusion dimension, rotation, and spatial distribution</li><li>Complete suppression of transmitted higher harmonics for nonlinear invisibility</li></ul><p dir="ltr"><b>Conference Details:</b></p><ul><li><b>Conference:</b> 1st International and 7th National Conference on Multidisciplinary Design, Analysis, and Optimization (iNCMDAO 2024)</li><li><b>Organizers:</b> Indian Institute of Science (IISc), Bengaluru and Aeronautical Society of India (AeSI)</li><li><b>Venue:</b> J. N. Tata Auditorium, IISc Bangalore</li><li><b>Dates:</b> December 16–18, 2024</li><li><b>Conference website:</b> <a href="incmdao2024.iisc.ac.in/" target="_blank" rel="noreferrer">incmdao2024.iisc.ac.in</a></li></ul><p dir="ltr"><b>Research portfolio:</b> <a href="sites.google.com/view/pravinkumarghodake/research" target="_blank" rel="noreferrer">sites.google.com/view/pravinkumarghodake/research</a></p><p dir="ltr"><b>Presentation Documentation:</b> The official iNCMDAO 2024 Full Programme is included as a supplementary file, documenting the session placement (S1 T1 — Topology Optimization, Main Hall), date (17 December 2024), and time slot (11:00–11:15 AM) of this paper.

A photograph of the author presenting the companion paper at the same conference is available in the related record [DOI of Paper 2 - <a href="doi.org/10.6084/m9.figshare.34037958" target="_blank" rel="noreferrer">doi.org/10.6084/m9.figshare.34037958</a>].</p><p dir="ltr"><b>Keywords:</b> inverse design, nonlinear phononic metamaterials, nonlinear wave cloaking, elastic invisibility, topology optimization, harmonic scattering, Murnaghan hyperelastic inclusions, gradient-free optimization, iNCMDAO 2024, IISc Bangalore</p>