research

This work deals with the small oscillations of two circular cylinders immersed in a viscous stagnant fluid. A new theoretical approach based on an Helmholtz expansion and a bipolar coordinate system is presented to estimate the fluid forces acting on the two bodies. We show that these forces are linear combinations of the cylinder accelerations and velocities, through viscous fluid added coefficients. To assess the validity of this theory, we consider the case of two equal size cylinders, one of them being stationary while the other one is forced sinusoidally.

Spider silk is an incredible material!
Check out our new paper at Physical Review Letters:

Dear iMechanicians, I hope that you find the below work interesting. We have developed a phase field-based computational framework for predicting fatigue crack nucleation and growth in Shape Memory Alloys. The model captures the role of transformation stresses, stress-strain hysteresis, and temperature. And this is demonstrated by computing Δε − N curves, quantifying Paris law parameters, and predicting fatigue crack growth rates in several geometries, including the fatigue failure of a 3D lattice structure. 

Liquid Nanofoam: Past, Present and Future

Mingzhe Li and Weiyi Lu

Department of Civil and Environmental Engineering, Michigan State University

1. Introduction

The motion of filament-like structures in fluid media has been a topic of interest since long. In this regard, a well known slender body theory exists wherein the fluid flow is assumed to be Stokesian while the filament is modeled as a Kirchhoff rod which can bend and twist but remains inextensible and unshearable. In this work, we relax the inextensibility and unshearability constraints on filaments, i.e., the filament is modeled as a special Cosserat rod.

Exceptionally high saturation magnetisation in Eu-doped magnetite stabilised by spin–orbit interaction

Unusual ferrimagnetic ground state in rhenium ferrite

Abstract

https://doi.org/10.1140/epjb/s10051-021-00272-y

Abstract 

Abhishek Arora, Rajat Arora, Amit Acharya