Tunable phononic bandgap materials designed via topology optimization

Dalklint, Anna; Wallin, Mathias; Bertoldi, Katia; Tortorelli, Daniel A.

doi:10.1016/j.jmps.2022.104849

Cited by 34 publications

(5 citation statements)

References 49 publications

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“…These metrics subsequently function as the design objectives for the force sensor. The diverse sensor architectures, in turn, provide the design space, and the implementation of an AI-enabled reverse design strategy for the sensor architecture could help accelerate the process of customization [ 146 , 263 , 264 , 265 , 266 , 267 , 268 , 269 , 270 , 271 , 272 , 273 , 274 , 275 , 276 , 277 , 278 , 279 , 280 ].…”

Section: Summary and Perspectivesmentioning

confidence: 99%

Rational Design of Flexible Mechanical Force Sensors for Healthcare and Diagnosis

Zhang,

Zhang

2023

Materials

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Over the past decade, there has been a significant surge in interest in flexible mechanical force sensing devices and systems. Tremendous efforts have been devoted to the development of flexible mechanical force sensors for daily healthcare and medical diagnosis, driven by the increasing demand for wearable/portable devices in long-term healthcare and precision medicine. In this review, we summarize recent advances in diverse categories of flexible mechanical force sensors, covering piezoresistive, capacitive, piezoelectric, triboelectric, magnetoelastic, and other force sensors. This review focuses on their working principles, design strategies and applications in healthcare and diagnosis, with an emphasis on the interplay among the sensor architecture, performance, and application scenario. Finally, we provide perspectives on the remaining challenges and opportunities in this field, with particular discussions on problem-driven force sensor designs, as well as developments of novel sensor architectures and intelligent mechanical force sensing systems.

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Section: Summary and Perspectivesmentioning

confidence: 99%

Rational Design of Flexible Mechanical Force Sensors for Healthcare and Diagnosis

Zhang,

Zhang

2023

Materials

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“…A brief recap of the theoretical concepts related to the nonlinear static and dynamic response of periodic composite materials is reported in Section 2. The numerical results obtained by superimposing an elastic wave motion through the Bloch wave technique [31][32][33] on a finitely deformed configuration of the proposed lightened composite metamaterials are reported in Section 3. As a result of this work, we highlight that there is excellent design potential for porous advanced bioinspired locally resonant metamaterials characterized by excellent wave absorption properties provided by the addition of lead cores and the onset of microscopic instabilities.…”

Section: Introductionmentioning

confidence: 99%

Elastic Wave Propagation Control in Porous and Finitely Deformed Locally Resonant Nacre-like Metamaterials

De Maio,

Greco,

Nevone Blasi

et al. 2024

Materials

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Recent studies have shown that the mechanical properties of bioinspired periodic composite materials can be strongly influenced by finite deformation effects, leading to highly nonlinear static and dynamic behaviors at multiple length scales. For instance, in porous periodic nacre-like microstructures, microscopic and macroscopic instabilities may occur for a given uniaxial loading process and, as a consequence, wave attenuation properties may evolve as a function of the microstructural evolution, designating it as metamaterials. The numerical outcomes provide new opportunities to design bioinspired, soft composite metamaterials characterized by high deformability and enhanced elastic wave attenuation capabilities given by the insertion of voids and lead cores.

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“…Most of the available contributions have been made in the past few years, and the possibilities of research remain largely open, not only in terms of the type of high-order elasticity model but also in terms of the intended application's physics (i.e., high-frequency vibroacoustics, thermomechanics), not to mention specific discussions on topology optimisation techniques (i.e., algorithm adaptation, updating scheme) concerning the treatment of microstructure effects. In terms of optimising the vibration bandgap, most of the available research has only explored classical elastodynamics descriptions, with applications in phononic crystal design [43], bandgap tuning of multiphase materials [44], and among other areas. While these studies have shown the feasibility of phononic material design via topology optimisation, the reported work did not achieve ideal bandgap width.…”

Section: Introductionmentioning

confidence: 99%

Topology optimisation for vibration bandgaps of periodic composite plates using the modified couple stress continuum

Cong,

Xia,

et al. 2024

Mathematics and Mechanics of Solids

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We propose a topology optimisation approach that can effectively account for the size effect of periodic composite plates to determine the optimal material distribution for achieving the largest bandgap width. The approach is based on the modified couple stress continuum and uses the relative bandgap width as the objective function, with volume constraints defined as the constraint function. The material properties are represented by the solid isotropic material with penalisation (SIMP) interpolation model, and the optimality criteria (OC) algorithm is employed to update the design variables. To address the significant size effect of the microplate structure, we use the modified couple stress continuum to model the dynamic behaviour of the unit cell. The Melosh–Zienkiewicz–Cheung (MZC) finite element is employed to ensure nodal [Formula: see text] continuity and achieve high-order elasticity with respect to inter-element continuity. Our results demonstrate that the proposed topology optimisation methodology is capable of effectively designing optimal unit cell configurations that account for size effect and significantly improve the bandgap width. We also investigate the impact of thickness and volume limitations on the optimised unit cell configuration. The obtained results suggest that the proposed topology optimisation framework is a promising approach for designing unit cell geometries with the account for size effect.

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Tunable phononic bandgap materials designed via topology optimization

Cited by 34 publications

References 49 publications

Rational Design of Flexible Mechanical Force Sensors for Healthcare and Diagnosis

Rational Design of Flexible Mechanical Force Sensors for Healthcare and Diagnosis

Elastic Wave Propagation Control in Porous and Finitely Deformed Locally Resonant Nacre-like Metamaterials

Topology optimisation for vibration bandgaps of periodic composite plates using the modified couple stress continuum

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