Generative AI for discovering porous oxide materials for next-generation energy storage
J. Datta et al., Generative AI for Discovering Porous Oxide Materials for Next-Generation Energy Storage, Cell Reports Physical Science, 2025 [PDF]
research
Programmable inverse design framework for morphing hard-magnetic soft materials
As a type of shape-programmable soft materials, hard-magnetic soft materials (HMSMs) exhibit rapid and reversible deformations under applied magnetic fields, showing promise for soft robotics, flexible electronics, and biomedical devices. The realization of various controllable shape transformations is crucial to the rational design of relevant applications.
The Darboux Classification of Curl Forces
We study particle dynamics under curl forces. These forces are a class of non-conservative, non-dissipative, position-dependent forces that cannot be expressed as the gradient of a potential function. We show that the fundamental quantity of particle dynamics under curl forces is a work 1-form. By using the Darboux classification of differential 1-forms on R2 and R3, we establish that any curl force in two dimensions has at most two generalized potentials, while in three dimensions, it has at most three.
Article: Fluid-Induced Vibration Frequency and Damping of a Coaxial Cylinder in a Quiescent Viscous Medium: Theoretical and Numerical Predictions.
This study, motivated by applications in nuclear engineering, examines the fluid-induced vibrations of a flexible inner cylinder concentrically positioned within a rigid outer cylinder, separated by a quiescent Newtonian viscous fluid. Building on our previous work, which focused on forced motions, we extend the theoretical formulation to account for vibrations induced by fluid forces. A new expression for the linear fluid force is derived, introducing a fluid transfer function that depends on key dimensionless numbers such as the aspect ratio, radius ratio, and Stokes number.
Invitation to a presentation by Prof. Karel Matouš (University of Notre Dame) - June 12, 2-3PM EDT
Dear Colleagues,
I would like to invite you to attend an upcoming presentation on:
“An Adaptive Spacetime Wavelet Method for Multiscale Problems in Fluid and Solid Mechanics”
at the ORNL Computational Mechanics Seminar, given by Prof. Karel Matouš from University of Notre Dame.
The seminar will be held June 12, 2025, 2-3PM EDT.
Article: Turbulence-induced vibration in annular flow of a rigid cylinder mounted on a cantilever beam
This study investigates the fluid–structure interaction of two coaxial cylinders separated by a Newtonian fluid under turbulent axial flow. The theoretical framework treats the inner cylinder as a rigid body mounted on a flexible blade modeled as a Rayleigh beam. The goals of this study are to determine the free vibration modes and frequencies, identify the fluid-elastic instability threshold, and establish an analytical expression for the mean-square displacement of the structure.
Nonlinear Cauchy Elasticity
Most theories and applications of elasticity rely on an energy function that depends on the strains from which the stresses can be derived. This is the traditional setting of Green elasticity, also known as hyper-elasticity. However, in its original form the theory of elasticity does not assume the existence of a strain energy function. In this case, called Cauchy elasticity, stresses are directly related to the strains. Since the emergence of modern elasticity in the 1940s, research on Cauchy elasticity has been relatively limited.
Discussion of fracture paper #44 - Flexo & piezoelectric effects and cracks
The Curie brothers, Pierre and Jacques, discovered the piezoelectric effect in 1880. The phenomenon has been exploited in many useful applications, such as for the pickup on the gramophone that registers the sound when it follows the winding groove in the vinyl record surface. It is also used in lighters that ignite a gas when the voltage gap between different locations exceeds the limit to produce a spark. When things are made smaller and smaller, passing mm's, microns down to nano scales, the piezoelectric effect is surpassed by the flexoelectric effect.
Size-dependent finite-deformation crystal plasticity
We have a new, slightly different perspective on the basis of size-dependent, finite-deformation crystal plasticity. If you are interested and have time to check it out, I’ll be happy to discuss it: