A Partially Auxetic Metamaterial Inspired By The Maltese Cross
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| Author | : Teik-Cheng Lim |
| Publisher | : Cambridge University Press |
| Total Pages | : 139 |
| Release | : 2022-09-15 |
| Genre | : Technology & Engineering |
| ISBN | : 1009246429 |
A partially-auxetic metamaterial is introduced, inspired by the Maltese cross. Each unit of this metamaterial consists of a pair of counter-rotating equal-armed crosses, which is interconnected to neighboring units via hinge rods and connecting rods. Based on linkage theory, the on-axes Poisson's ratio was established considering a two-fold symmetrical mechanism, while the (anti)tetrachiral mechanisms were identified for on-axes uniaxial compression. A shearing mechanism is suggested for pure shearing and diagonal loading of the metamaterial with square array. Results suggest that the approximated infinitesimal models are valid for the Poisson's ratio of the two-fold symmetrical and the (anti)tetrachiral mechanisms under on-axis tension and compression, respectively; however, the finite model is recommended for quantifying the Poisson's ratio under pure shear and off-axis loading. This metamaterial manifests microstructural trinity, in which three different loading modes result in three different groups of deformation mechanisms. Finally, suggestions are put forth for some unsolved predictive problems.
| Author | : Teik-cheng Lim |
| Publisher | : World Scientific |
| Total Pages | : 538 |
| Release | : 2023-09-13 |
| Genre | : Technology & Engineering |
| ISBN | : 9811272506 |
How can non-windy places make use of wind power for electricity generation? Advanced Wind Turbines provides detailed information that is of great practical importance to wind turbine practitioners from small and congested city-states, where the lack of vast land and high wind speed render the conventional wind turbine less effective. It introduces the non-conventional Darrieus and Savonius wind turbines, as well as their hybrid version, covering basic concepts, computational modelling and recent advances in experimental optimization.What about those who prefer wind turbines in faraway oceans to take advantage of high wind speed, or who come from countries with a lack of shallow seabed? Floating offshore wind turbines are also discussed, and the dynamics of floating vis-à-vis grounded wind turbines are thoroughly expounded upon to aid practitioners in achieving more accurate performance modelling. This is a work of paramount usefulness for areas which have long wanted to jump on the renewable energy bandwagon, but have thus far been hampered by their natural geographical limitations.
| Author | : Teik-Cheng Lim |
| Publisher | : Springer |
| Total Pages | : 591 |
| Release | : 2014-12-27 |
| Genre | : Science |
| ISBN | : 9812872752 |
This book lays down the foundation on the mechanics and design of auxetic solids and structures, solids that possess negative Poisson’s ratio. It will benefit two groups of readers: (a) industry practitioners, such as product and structural designers, who need to control mechanical stress distributions using auxetic materials, and (b) academic researchers and students who intend to produce unique mechanical and other physical properties of structures using auxetic materials.
| Author | : Yue Li |
| Publisher | : Cambridge University Press |
| Total Pages | : |
| Release | : 2022-02-03 |
| Genre | : Technology & Engineering |
| ISBN | : 100923417X |
This Element introduces the exotic wave phenomena arising from the extremely small optical refractive index, and sheds light on the underlying mechanisms, with a primary focus on the basic concepts and fundamental wave physics. The authors reveal the exciting applications of ENZ metamaterials, which have profound impacts over a wide range of fields of science and technology. The sections are organized as follows: in Section 2, the authors demonstrate the extraordinary wave properties in ENZ metamaterials, analyzing the unique wave dynamics and the resulting effects. Section 3 is dedicated to introducing various realization methods of the ENZ metamaterials with periodic and non-periodic styles. The applications of ENZ metamaterials are discussed in Sections 4 and 5, from the perspectives of microwave engineering, optics, and quantum physics. The authors close in Section 6 by presenting an outlook on the development of ENZ metamaterials and discussing the key challenges addressed in future works.
| Author | : Wei Xiang Jiang |
| Publisher | : Cambridge University Press |
| Total Pages | : 75 |
| Release | : 2022-01-31 |
| Genre | : Technology & Engineering |
| ISBN | : 9781108819183 |
Metamaterials, including their two-dimensional counterparts, are composed of subwavelength-scale artificial particles. These materials have novel electromagnetic properties, and can be artificially tailored for various applications. Based on metamaterials and metasurfaces, many abnormal physical phenomena have been realized, such as negative refraction, invisible cloaking, abnormal reflection and focusing, and many new functions and devices have been developed. The effective medium theory lays the foundation for design and application of metamaterials and metasurfaces, connecting metamaterials with real world applications. In this Element, the authors combine these essential ingredients, and aim to make this Element an access point to this field. To this end, they review classical theories for dielectric functions, effective medium theory, and effective parameter extraction of metamaterials, also introducing front edge technologies like metasurfaces with theories, methods, and potential applications. Energy densities are also included.
| Author | : Wenwei Yu |
| Publisher | : CRC Press |
| Total Pages | : 485 |
| Release | : 2012-12-03 |
| Genre | : Medical |
| ISBN | : 1439871744 |
Therapeutic Engineering (TE) is a cutting-edge domain in today's era of medical technology research. Through engineering algorithms that provide technological solutions, it aims to elevate the quality of life of disabled individuals. Advances in Therapeutic Engineering describes various therapeutic processes and mechanisms currently applied to the
| Author | : Roderic S. Lakes |
| Publisher | : Cambridge University Press |
| Total Pages | : 481 |
| Release | : 2009-04-27 |
| Genre | : Science |
| ISBN | : 052188568X |
This graduate text on viscoelastic materials addresses design applications as diverse as earplugs, computer disks and medical diagnostics.
| Author | : Teik-Cheng Lim |
| Publisher | : CRC Press |
| Total Pages | : 326 |
| Release | : 2016-04-19 |
| Genre | : Science |
| ISBN | : 143980737X |
Nanosensors are rapidly becoming a technology of choice across diverse fields. They offer effective and affordable options for detecting and measuring chemical and physical properties in difficult-to-reach biological and industrial systems operating at the nanoscale. However, with nanosensor development occurring in so many fields, it has become di
| Author | : Francesco dell'Isola |
| Publisher | : Cambridge University Press |
| Total Pages | : 409 |
| Release | : 2020-03-12 |
| Genre | : Science |
| ISBN | : 1107087732 |
Explores the relationship between discrete and continuum mechanics as a tool to model new and complex metamaterials. Including a comprehensive bibliography and historical review of the field, and a pedagogical mathematical treatment, it is ideal for graduate students and researchers in mechanical and civil engineering, and materials science.
| Author | : Esmaeal Ghavanloo |
| Publisher | : Springer Nature |
| Total Pages | : 463 |
| Release | : 2021-04-02 |
| Genre | : Science |
| ISBN | : 3030630501 |
This book offers a comprehensive and timely report of size-dependent continuum mechanics approaches. Written by scientists with worldwide reputation and established expertise, it covers the most recent findings, advanced theoretical developments and computational techniques, as well as a range of applications, in the field of nonlocal continuum mechanics. Chapters are concerned with lattice-based nonlocal models, Eringen’s nonlocal models, gradient theories of elasticity, strain- and stress-driven nonlocal models, and peridynamic theory, among other topics. This book provides researchers and practitioners with extensive and specialized information on cutting-edge theories and methods, innovative solutions to current problems and a timely insight into the behavior of some advanced materials and structures. It also offers a useful reference guide to senior undergraduate and graduate students in mechanical engineering, materials science, and applied physics.
