We introduce a generalized methodology to uncover all mechanical couplings in 2D lattice geometries by obtaining the decoupled micropolar elasticity tensor. We also correlate the mechanical couplings with the point groups of 2D lattices by applying the symmetry operation to the decoupled micropolar elasticity tensor. The decoupled micropolar constitutive equation reveals eight mechanical coupling effects in planar solids, four of which are discovered for the first time in the mechanics' community.
I would like to draw your attention to our recently proposed predictive method based on a semi-empirical model (LEFM) and Neural Network, exploiting the Physics-informed Machine Learning concept. We show how the accuracy of state-of-the-art fatigue predictive models, based on defects present in materials, can be significantly boosted by accounting for additional morphological features via Physics-Informed Machine Learning.
Jie Ma, Daochen Yin, Zhi Sheng, Jian Cheng, Zheng Jia*, Teng Li, Shaoxing Qu, Delayed Tensile Instabilities of Hydrogels, Journal of the Mechanics and Physics of Solids, 168, 105052 (2022)
The homogenized constitutive models that have been utilized to simulate the behavior of nanostructures are typically based on the Cauchy–Born hypothesis, which seeks the fundamental properties of material via relating atomistic information to an assumed homogeneous deformation field. It is well known that temperature has a profound effect on the validity and size-dependency of the Cauchy-Born hypothesis in finite deformations.
The Applied Mechanics Executive Committee (AMD-EC) is pleased to announce the 2022 IMECE student travel award competition, which is sponsored by the Haythornthwaite Foundation*.
This article addresses the interaction of two coaxial cylinders separated by a thin fluid layer. The cylinders are flexible, have a finite length, and are subject to a vibration mode of an Euler–Bernoulli beam. Assuming a narrow channel, an inviscid and linear theoretical approach is carried out, leading to a new simple and tractable analytical expression of the fluid forces.
Hard-magnetic soft materials have attracted broad interests because of their flexible programmability, non-contact activation and rapid response in various applications such as soft robotics, biomedical devices and flexible electronics. Such multifunctional materials consist of a soft matrix embedded with hard-magnetic particles, and can exhibit large deformations under external magnetic stimuli. Here, we develop a three-dimensional (3D) rod model to predict spatial deformations (extension, bending and twist) of slender hard-magnetic elastica.
We recently pablished a paper titled "Multiscale design of nonlinear materials using reduced-order modeling", which might be interesting to you. The paper is freely accessible by this link through 09/24/2022 on Elsiver, and an author's copy is here. The abstract is attached below. Thank you for your interest.
I am excited to share that we recently developed iVABS as an integrated VABS-based framework for design and optimization, parametric studies, uncertainty quantifications of composite rotor blades, and other beam-like structures. This tool is particularly useful for rapid design of composite slender structures with accuracy of detailed 3D FEA at the speed of simple engineering beam theories.
Sameh Tawfick, University of Illinois at Urbana-Champaign (tawfick@illinois.edu)
Birds have feathers, animals have fur, humans and plants have hair, and mimicking these multifunctional morphologies will undoubtedly improve future robots, buildings, and drones
We are pleased to share with you and invite you to read our work on energy conserving space-time metamaterials/media which has been published in Applied Physics Letters (selected as Editor's pick). The link to the online version is pasted below:
Exceptional points (EP) are non-Hermitian degeneracies where eigenvalues and their corresponding eigenvectors coalesce. Recently, EPs have attracted attention as a means to enhance the responsivity of sensors, through the abrupt resonant detuning occurring in their proximity. In many cases, however, the EP implementation is accompanied by noise enhancement, leading to the degradation of the sensor’s performance.
Topic: Soft Electronic and Microfluidic Systems for the Skin Time: 8:00 AM, 12 August, 2022 (New York) 8:00 PM, 12 August, 2022 (Beijing) 10:00 PM, 12 August, 2022 (Sydney) 1:00 PM, 12 August, 2022 (London) Speaker: Prof. John A. Rogers
This is a long post; it covers a dilemma I'm facing right now; but there is no real ``masaalaa'' to it; so, if you aren't a researcher yourself, leave it alone.
Composite tape-spring hinge (CTSH) is a simple yet elegant mechanical component for various deployable space structures. This paper formulates and addresses cut-out shape optimization of a CTSH, which is seldom touched upon in literature. Both the maximum strain energy stored during the folding process as well as the maximum bending moment during deployment were maximized in a concurrent way, and the multi-objective optimization problem was realized by merging data-driven surrogate modeling and shape optimization.
Please take a look at the paper of our PhD student Beatrice Bisighini in Advances in Engineering Software: "EndoBeams.jl: A Julia finite element package for beam-to-surface contact problems in cardiovascular mechanics". We propose an efficient framework for modelling beam-to-surface contact, specifically designed to model endovascular devices.
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