Transformational acoustics offers the theoretical possibility of cloaking obstacles within fluids, provided metamaterials having continuously varying bulk moduli and densities can be found or constructed. Realistically, materials with the proper, continuously varying anisotropies do not presently exist. However, discretely layered cloaks having constant material parameters within each layer may be a viable alternative in practice. The present work considers a range of cloaks, from those comprised of fluid layers that are isotropic in bulk moduli with anisotropic density (inertial cloaks) to those having anisotropic bulk moduli and isotropic density (pentamode cloaks). In this paper an analytical solution is obtained for the case of plane wave scattering from a submerged rigid cylinder covered with a multilayered cylindrical cloak composed of discrete anisotropic fluid layers. An investigation of the parameter space defining such cloaks is undertaken with the goal of minimizing the far-field scattered pressure, using layer constituent anisotropic properties (density and bulk modulus) constrained to lie within reasonable ranges relative to those of water.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1121/1.4949541 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Towards linking histological changes to liver viscoelasticity: a hybrid analytical-computational micromechanics approach.
Phys Med Biol
January 2025
North Carolina State University, Fitts Woolard Hall, Raleigh, North Carolina, 27695-7908, UNITED STATES.
Motivated by elastography that utilizes tissue mechanical properties as biomarkers for liver disease, with the eventual objective of quantitatively linking histopathology and bulk mechanical properties, we develop a micromechanical modeling approach to capture the effects of fat and collagen deposition in the liver. Specifically, we utilize computational homogenization to convert the microstructural changes in hepatic lobule to the effective viscoelastic modulus of the liver tissue, i.e.
View Article and Find Full Text PDFStem cells adapt to their local mechanical environment by rearranging their cytoskeleton, which underpins the evolution of their shape and fate as well as the emergence of tissue structure and function. Here, in the second part of a two-part experimental series, we aimed to elucidate spatiotemporal cytoskeletal remodeling and resulting changes in morphology and mechanical properties of cells and their nuclei. Akin to mechanical testing of the most basic living and adapting unit of life, i.
View Article and Find Full Text PDFConstruction and Experimental Validation of Embedded Potential Functions for Ta-Re Alloys.
Molecules
December 2024
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Ta/Re layered composite material is a high-temperature material composed of the refractory metal tantalum (Ta) as the matrix and high-melting-point, high-strength rhenium (Re) as the reinforcement layer. It holds significant potential for application in aerospace engine nozzles. Developing the Ta/Re potential function is crucial for understanding the diffusion behavior at the Ta/Re interface and elucidating the high-temperature strengthening and toughening mechanism of Ta/Re layered composites.
View Article and Find Full Text PDFInterspecies Comparison of Multilayer Mechanical Properties of Synovium Using Atomic Force Microscopy.
Tissue Eng Part A
January 2025
Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, USA.
The synovium is a loose connective tissue that separates the intra-articular (IA) joint compartments of all diarthrodial joints from the systemic circulation. It can be divided into two layers: the intima, a thin and cell-dense layer atop a more heterogeneous subintima, composed of collagen and various cell types. The subintima contains penetrating capillaries and lymphatic vessels that rapidly clear injected drugs from the joint space which may vary not only with drug size and charge but also with the microstructure and composition of the intima and subintima of the synovium.
View Article and Find Full Text PDFA composite hydrogel of porous gold nanorods and gelatin: Nanoscale structure and rheomechanical properties.
J Chem Phys
January 2025
Soft Matter and Nanomaterials Laboratory, Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076, India.
Article Synopsis
- Incorporating nanomaterials into hydrogels allows for the creation of customizable materials with adjustable properties based on their nanoscale structures.
- This study explores the relationship between the structural arrangement and properties of a composite hydrogel made from thermoresponsive polymer, gelatin, and antimicrobial light-responsive gold nanorods (PAuNRs).
- Findings indicate that the addition of PAuNRs leads to a softer hydrogel with reduced elasticity, which can be tailored for specific biomedical applications like tissue engineering and drug delivery.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!