Extreme Mechanics Letters, Год журнала: 2023, Номер 63, С. 102064 - 102064
Опубликована: Авг. 14, 2023
Язык: Английский
Smart Materials and Structures, Год журнала: 2023, Номер 32(12), С. 123001 - 123001
Опубликована: Окт. 16, 2023
Abstract Guided waves, elastic waves propagating through bounded structures, play a pivotal role in various applications, including ultrasonic non-destructive testing and structural health monitoring. Recently, metamaterials artificially engineered to exhibit physical properties not typically seen nature have emerged as ground-breaking approach, heralding new era guided wave-based technologies. These offer innovative solutions overcome the inherent constraints of traditional technology. This paper comprehensively reviews from their fundamental principles diverse focusing on transformative impact wave manipulation.
Язык: Английский
Процитировано
33
Advanced Science, Год журнала: 2023, Номер 10(19)
Опубликована: Апрель 20, 2023
Abstract Extreme impedance mismatch causes sound insulation at water–air interfaces, limiting numerous cross‐media applications such as ocean‐air wireless acoustic communication. Although quarter‐wave transformers can improve transmission, they are not readily available for acoustics and restricted by the fixed phase shift full transmission. Here, this limitation is broken through impedance‐matched hybrid metasurfaces assisted topology optimization. Sound transmission enhancement modulation across interface achieved independently. Compared to bare interface, it experimentally observed that average transmitted amplitude an metasurface peak frequency enhanced ≈25.9 dB, close limit of perfect 30 dB. And nearly 42 dB measured with axial focusing function. Various customized vortex beams realized promote in The physical mechanisms broadband wide‐angle incidences revealed. proposed concept has potential efficient free communication dissimilar media.
Язык: Английский
Процитировано
31
International Journal of Mechanical Sciences, Год журнала: 2023, Номер 257, С. 108538 - 108538
Опубликована: Июнь 15, 2023
Язык: Английский
Процитировано
26
International Journal of Mechanical Sciences, Год журнала: 2023, Номер 255, С. 108460 - 108460
Опубликована: Май 11, 2023
Язык: Английский
Процитировано
24
Mechanical Systems and Signal Processing, Год журнала: 2024, Номер 211, С. 111260 - 111260
Опубликована: Фев. 17, 2024
Язык: Английский
Процитировано
17
International Journal of Mechanical Sciences, Год журнала: 2024, Номер 266, С. 108975 - 108975
Опубликована: Янв. 2, 2024
Язык: Английский
Процитировано
12
Advanced Materials, Год журнала: 2024, Номер 36(23)
Опубликована: Фев. 28, 2024
Abstract Shape morphing in bistable kirigami enables remarkable functionalities appealing to a diverse range of applications across the spectrum length scale. At core their shape shifting lies architecture repeating unit, where highly deformable slits and quasi‐rigid rotating units often exhibit multiple symmetries that confer isotropic deployment obeying uniform scaling transformation. In this work, symmetry breaking is investigated access geometric frustration anisotropic morphing, enabling arbitrarily scaled planar spatial domains. With an analysis on properties complemented by systematic investigation integrating semi‐analytical derivations, numerical simulations, experiments elastic sheets, work unveils fundamental relations between slit symmetry, frustration, deployment. Furthermore, asymmetric are leveraged flat‐to‐3D demonstrations showcase pivotal role shear deformation achieving target shapes functions so far unattainable with uniformly stretchable kirigami. The insights provided unveil controlling soft metamaterials, enriching achievable for spanning deployable space structures, wearable technologies, machines.
Язык: Английский
Процитировано
12
Small, Год журнала: 2024, Номер 20(19)
Опубликована: Янв. 17, 2024
Abstract The acoustic coding metasurfaces (ACMs) have the ability to manipulate complex behavior by reconstructing sequence. In particular, design of broadband enhances versatility ACMs. ACMs offer significant advantages over traditional metasurfaces, including a limited number units and flexible wave control performance. unit quantity is determined 2 n , with 1‐bit utilizing units, 2‐bit using 4 3‐bit employing 8 units. Utilizing multiple bits allows for precise phase sound waves enables realization more intricate functions. To address requirements multi‐bit applications, this paper presents development novel reflected (BACMs) eight These are systematically designed bottom‐up topology optimization method. A constant difference 45° can be achieved across all within broad frequency range. Additionally, spiral distribution differences construction an vortex metasurface. Moreover, combining convolution method, strategies outlined constructing vortex‐focusing beam manipulation metasurfaces. possess potential in fields particle suspension communication.
Язык: Английский
Процитировано
10
Journal of the Mechanics and Physics of Solids, Год журнала: 2024, Номер 187, С. 105632 - 105632
Опубликована: Март 27, 2024
Gradient acoustic metasurfaces are a class of subwavelength metamaterials that provide unprecedented opportunities to control the direction reflected and refracted waves, including negative angles in accordance with diffraction theory generalized law reflection. This opens new possibilities designing for many practical applications wave engineering. In this work, locally resonant considered as building units metasurface, which owe their favorable properties local resonances at microstructural level. Non-trivial reflection realized by introducing suitable phase modulations along path. The required shift is achieved through variation geometrical material parameters metamaterial unit cells. ultrasound waves demonstrated numerically means finite-element analysis fluid-metasurface-solid structure. results study insights detailed guidelines controllable
Язык: Английский
Процитировано
10
Thin-Walled Structures, Год журнала: 2024, Номер 200, С. 111936 - 111936
Опубликована: Апрель 25, 2024
Язык: Английский
Процитировано
10