research

Sharing a new article "Finite element implementation of Field Crack Mechanics for brittle and ductile fracture" by my Ph.D. student BVSS Bharadwaja at IIT Bombay, which has been accepted for publication in Theoretical and Applied Fracture Mechanics. Also see attached. Thanks to Prof. Amit Acharya for the motivation and discussion.

It is my pleasure to share a new article titled "An Experimentally Informed Continuum Grain Boundary Model" by Syed Ansari (my Ph.D. student at IIT Bombay). This work was performed in collaboration with Prof. Amit Acharya.

A fully-funded Ph.D. position is available in the Control, Automation, and Mechatronics (CAM) lab at Kent State University, Kent, OH, starting in Spring 2025. The program is housed within the College of Aeronautics and Engineering and focuses on Mechatronics Engineering. Ideal candidates will need to have completed their master’s degree by the end of 2024 and must possess a strong foundation in controls, system identification, and machine learning, along with proficient programming skills in Python and MATLAB.

Dear colleagues, 

We invite you to read our article, which informs one about the extent to which resonances can be tuned in metamaterials. More precisely, our work provides tight bounds correlating the Quality-factor with peak absorption in dielectric metamaterials. The article is published in Applied Physics Letters and can be found here: https://doi.org/10.1063/5.0155092 

The composite tape-spring hinge (CTSH) is a lightweight structural connector widely employed in space structures, including spacecraft and satellites, due to its high specific strength and stiffness. Introducing cutouts enables CTSH to possess folding and deployment capability, while optimizing the cutouts finely to optimize the performance of CTSH. However, the interaction between cutout size and the dynamic deployment of CTSH is a novel topic.

The ABD matrix is a fundamental method to characterize the overall stiffness behavior of laminated composite structures. Although classical laminate theory has been widely used, it has limitations in predicting the ABD matrix for woven composites. To address this issue, this paper presents a mesoscale homogenization approach aimed at computing the ABD matrix for thin woven composites accurately. The mesoscale representative volume element (RVE) of the woven composite is generated using TexGen and imposed with periodic boundary conditions to enforce the Kirchhoff thin plate assumption.

To address the significant challenges in predicting high-dimensional chaotic systems, this paper introduces a novel hybrid strategy that combines proper orthogonal decomposition (POD), which serves as reduced order modeling (ROM), with next generation reservoir computing (NGRC), a data-driven prediction model.

Please pardon me if I am preaching to the choir here. Rules of mixtures (ROM) are very simple mechanics models. Everybody on this site has a very good understanding of it. However, confusion and mistakes on ROM constantly appear in textbooks, journal articles, online learning materials, etc. See attached two wiki articles. The major confusing point is that vf*Ef+vm*Em is derived from the isostrain assumption and the upper bound. Both statements are incorrect. There might be two main reasons contributed to this mistake/confusion.