research

Applications are invited for a 2-year postdoc position in the area of advanced materials for small modular nuclear reactors. This position is a full-time position at the University of Western Ontario, Canada, and the selected applicant can start effective immediately. In addition, this position is extendable for another year, depending on the availability of funds and the applicant’s performance.

Dear colleagues,

I'm happy to share a new article with you Polymer networks which locally rotate to acommodate stresses, torques, and deformations to be published in JMPS.

Title: Polymer networks which locally rotate to acommodate stresses, torques, and deformations

Author: Matthew Grasinger

Authors - Prashant K. Jha, Timothy Breitzman, and Kaushik Dayal 

Journal - Archive for Rational Mechanics and Analysis 

Abstract

Dear friends, I want to share our recent work on the shape characteristics of 2D crystal blisters. Micro- and nano-sized blisters can form spontaneously when two-dimensional (2D) crystals are transferred onto substrates because liquid molecules that are initially adsorbed on 2D material and substrate surfaces can be squeezed and trapped by interfacial forces. On the one hand, blisters are undesirable in 2D material devices as they impede charge/photon/phonon transport across the interface, so various means were developed to eliminate interfacial blisters. On the other hand, mechanics analys

Prof. Fabrice Pierron

University of Southampton, UK

MatchID NV, Ghent, Belgium

50 days' of free access to the article. Anyone clicking on this link before May 12, 2023, will be taken directly to the latest version of the article on ScienceDirect, which you are welcome to read or download. No sign-up, registration, or fees are required.

Abstract

The Kullback-Leibler (KL) divergence is widely used in state-of-the-art Bayesian Neural Networks (BNNs) to ap- proximate the posterior distribution of weights. However, the KL divergence is unbounded and asymmetric, which may lead to instabilities during optimization or may yield poor generalizations. To overcome these limitations, we examine the Jensen-Shannon (JS) divergence that is bounded, symmetric, and more general. Towards this, we propose two novel loss functions for BNNs.

This article addresses the small-amplitude forced beam vibrations of two coaxial finite-length cylinders separated by a viscous Newtonian fluid. A new theoretical approach based on an Helmholtz expansion of the fluid velocity vector is carried out, leading to a full analytical expression of the fluid forces and subsequently of the modal added mass and damping coefficients. Our theory shows that the fluid forces are linear combinations of the Fourier harmonics of the vibration modes.

R Cavuoto, A Cutolo, K Dayal, L Deseri *, M Fraldi*, Journal of the Mechanics and Physics of Solids 172 (2023) 105189 https://doi.org/10.1016/j.jmps.2022.105189

Abstract

Dear Colleagues,

I invite you to read our recent publication on Acta Materialia on the dynamic hardness evolution in metals.

Abstract

In this paper we formulate and solve the initial-boundary value problem of accreting circular cylindrical bars under finite extension. We assume that the bar grows by printing stress-free cylindrical layers on its boundary cylinder while it is undergoing a time-dependent finite extension. Accretion induces eigenstrains, and consequently residual stresses. We formulate the anelasticity problem by first constructing the natural Riemannian metric of the growing bar. This metric explicitly depends on the history of deformation during the accretion process.

CIM (Centre for Interdisciplinary Mathematics) at Uppsala University in Sweden is recruiting PhD students for three of the seventeen projects announced. One of the announced projects are proposad by us to address elasto-hydro-dynamic analysis of architectured materials. If interested, please consider applying:

https://www.uu.se/en/about-uu/join-us/details/?positionId=596823

Dear Colleagues, 

I invite you to read our recent Extreme Mechanics Letters paper presenting a novel viewpoint on enhancing emissivity near exceptional point singularities in a non-Hermitian metamaterial. We present the experiments and numerical modeling in an elastodynamic framework--where the actuation forces from an actuator are enhanced by coupling to a passive dissipative non-Hermitian metamaterial--and present the theory further generalized and applicable to other physical frameworks from acoustics to optics and microwaves.

Abstract

https://www.amazon.com/Introduction-Unified-Mechanics-Theory-Application...

I would like to share our recent paper entitled "Numerical investigation of aerothermoelastic characteristics of a thin heated panel in high supersonic and hypersonic flow" published in Acta Mechanica.

Please see attached for a postdoc opportunity at SUNY Buffalo. Any questions from potential applicants can be emailed to me directly.

Like Poisson’s effect, mechanical coupling is a directional indirect response by a directional input loading. With the advance in manufacturing techniques of 3D complex geometry, architected materials with unit cells of finite volume rather than a point yield more degrees of freedom and foster exotic mechanical couplings such as axial–shear, axial–rotation, axial–bending, and axial–twisting.

cdmHUB invites you to attend the Global Composites Experts Webinar Series. 

Title:  Fiber Orientation Prediction for Discontinuous Fiber Composites: Fundamentals and Future Trends

Speaker:  Professor Charles Tucker, UIUC

Time: 2/2, 11AM-12PM EST.

Darren C. Pagan a, Romain Quey b, Matthew P. Kasemer c

a Materials Science and Engineering, The Pennsylvania State University, University Park PA 16802, US

b Mines Saint-Etienne, Univ. Lyon, CNRS, UMR 5307 LGF, F–42023 Saint-Etienne, France

c Mechanical Engineering, The University of Alabama, Tuscaloosa AL 35487, US

1. Introduction