We discovered a novel mechanical coupling effect – axial-bending coupling. Unlike Poisson, axial-shear, and axial-twisting coupling effects, this axial-bending coupling occurs at a non-centrosymmetric square lattice.
For more information, you can check this paper:
https://www.sciencedirect.com/science/article/pii/S0264127522001538
Based on magneto-active polymers, we provide a non-invasive and real-time control methodology to impose complex mechanical forces on biological systems. The device is conceptualised to be suitable for any traditional microscope! See scheme:
We allow for reproducing complex mechanical processes by simulating a set of local strain patterns occurring in real scenarios. We demonstrated this by simulating strain distribution occurring within the brain tissue during a head impact (Knutsen et al., 2020 #BMphi).
Universal displacements are those displacements that can be maintained, in the absence of body forces, by applying only boundary tractions for any material in a given class of materials. Therefore, equilibrium equations must be satisfied for arbitrary elastic moduli for a given anisotropy class. These conditions can be expressed as a set of partial differential equations for the displacement field that we call universality constraints. The classification of universal displacements in homogeneous linear elasticity has been completed for all the eight anisotropy classes.
Dear iMechanicians,
I hope that you find the following paper of interest. We conducted 3D (phase field) fracture simulations that explicitly resolve the microstructure of composites, predicting the role of key mechanisms such as fibre bridging (i.e., an output of the model, not an input!).
Phase field fracture predictions of microscopic bridging behaviour of composite materials
W. Tan and E. Martínez-Pañeda. Composite Structures 286, 115242 (2022)
This is the preprint of an article that will appear in Physical Review Materials (https://doi.org/10.1103/PhysRevMaterials.6.033402).
Comparison of simulated and measured grain volume changes during grain growth
Xiaoyao Peng, Aditi Bhattacharya, S. Kiana Naghibzadeh, David Kinderlehrer, Robert Suter, Kaushik Dayal, and Gregory S. Rohrer
Abstract
A PhD student position in the field of mechanics is available in the Department of Mechanical and Product Design Engineering at the Swinburne University of Technology (Melbourne, Australia). The project will focus on developing a new energy-absorbing metamaterial, incorporating the synergistic effect of shear-thickening fluid (STF) and cellular structures, for improved mechanical performance under different loading conditions.
Prior experience with finite element methods and impact testings is highly preferred.
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
