Review
Nanoscience & Nanotechnology
Haedong Park, Seungyun Jo, Byungsoo Kang, Kahyun Hur, Sang Soon Oh, Du Yeol Ryu, Seungwoo Lee
Summary: Gyroid crystals with their peculiar structural features possess exotic optical properties and have been considered as promising structures for photonic crystals and optical metamaterials. Self-assembly of block copolymers (BCPs) provides an easy-to-craft gyroid structure, especially at the nanoscale. BCP gyroid nanophotonics has the potential to advance topological photonics in the optical regime.
Article
Physics, Multidisciplinary
Matheus I. N. Rosa, Massimo Ruzzene
Summary: This paper investigates the dynamic behavior of lattices with disorder introduced through non-local network connections. The study reveals the emergence of spectral gaps in the lattice for increasing levels of disorder, leading to low transmission levels of vibrations. It is also found that the disordered lattices undergo transitions from ballistic to super-diffusive or diffusive transport. These findings demonstrate the potential for disorder in the form of non-local connections to enable additional functionalities for metamaterials.
NEW JOURNAL OF PHYSICS
(2022)
Article
Mechanics
Yongqing Cai, Jiu Hui Wu, Yicai Xu, Fuyin Ma
Summary: The paper proposes a lightweight, thin-plate elastic metamaterial with transverse, longitudinal, and torsional wave polarization band gaps, achieved through ingenious microstructure design, enabling selective suppression of elastic waves exhibiting different polarization forms. This elastic metamaterial structure provides a practical implementation scheme for the separation and manipulation of elastic waves in different polarization forms in solid structures.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Rosaria Del Toro, Andrea Bacigalupo, Marco Lepidi, Andrea Mazzino
Summary: This paper investigates the influence of heterogeneous multi-phase cells on the propagation of multifield Bloch waves in magneto-electro-elastic (MEE) materials. The dispersion properties are analyzed through analytical determination and perturbation methods. It is found that slow-propagating quasi-shear-elastic waves dominate the low-frequency range, while fast-propagating quasi-magneto-electric waves dominate the high-frequency range. The propagation and attenuation behaviors of these waves can be controlled by varying the physical parameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Hui-Kai Zhang, Xi-Qiao Feng
Summary: This paper proposes a soft metamaterial with chiral and hierarchical structures, which can easily regulate its elastic wave bandgaps through postbuckling-induced evolution. The postbuckling behavior of chiral hierarchical structures is investigated and analyzed for their stress-strain curves, phase diagram of uniaxial critical compressive strength, and tunable elastic wave bandgaps.
EXTREME MECHANICS LETTERS
(2021)
Article
Computer Science, Interdisciplinary Applications
Andrea Bacigalupo, Luigi Gambarotta
Summary: This study overcomes this drawback through a high-frequency dynamic homogenization scheme, proposing pseudo-differential equations based on enhanced continualization of discrete governing equations to obtain a higher order micropolar continuum thermodynamically consistent with inertial non-locality. The proposed continuum models accurately describe both the static and dynamic behavior of discrete granular models, converging to the response of the discrete system with increasing order of the higher order continuum.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Mechanical
Jeseung Lee, Minwoo Kweun, Woorim Lee, Chung Il Park, Yoon Young Kim
Summary: A novel theory for perfect transmission across solid-solid interfaces is established, and a unique nonresonant anisotropic metamaterial is proposed to realize the theory. The validity of the theory is verified through experiments, and transmittance enhancement over a wide range of frequencies and incidence angles is confirmed.
EXTREME MECHANICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Alya Alhammadi, Jin-You Lu, Mahra Almheiri, Fatima Alzaabi, Zineb Matouk, Mohamed Al Teneiji, Rashid K. Abu Al-Rub, Vincenzo Giannini, Dong-Wook Lee
Summary: The dispersion curves of the epoxy/tungsten carbide composite show that the propagation of elastic waves is prohibited inside the periodic structure, and increasing the number of inclusions and the filling fraction of the unit cell significantly broaden the phononic bandgap. The relationship between bandwidth and filling fraction of the composite structure was found to be nonmonotonic, influenced by spacing among inclusions and inclusion sizes.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Multidisciplinary
Qi Li, Haichao Yuan, Xiaomei Sun, Zifei Xiao
Summary: Elastic metamaterials with band gaps are useful in blocking elastodynamic waves and have various applications. The two goals in research on elastic metamaterials with band gaps are wide band gaps and low-frequency band gaps. In this study, two models of two-dimensional elastic metamaterials with self-similar hierarchies were designed by replacing the arms in the unit cell with composite structures. Each unit cell with second-order replacement has a wide band gap and low-frequency band gap. The influence of the geometric dimensions of the arms on the properties of the band gaps was also investigated.
Article
Computer Science, Information Systems
Somayyeh Asgari, Tapio Fabritius
Summary: This study analyzes the performance of graphene-based multi-band chiral metamaterial absorbers using an equivalent circuit model in the terahertz range. Four tunable absorbers with multiple absorption bands are designed and demonstrated to have promising potential in future terahertz systems. The results show that the absorbers have high absorption rates and can be dynamically controlled.
Article
Mechanics
Xiang Fang, Kuo-Chih Chuang, Xiao-Ling Jin, Dan-Feng Wang, Zhi-Long Huang
Summary: This work investigates the flexural wave bandgap properties of an elastic metamaterial plate with periodic arrays of inerter-based dynamic vibration absorbers (IDVAs). The plate exhibits multiple band gaps due to the additional degree-of-freedom induced by each IDVA, with wide band gaps generated in different directions by adding a dissipative mechanism to the IDVAs. The proposed inertant elastic metamaterial plate has extra-wide low-frequency flexural band gaps and potential applications in engineering vibration prohibition.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2021)
Article
Materials Science, Multidisciplinary
Antonio Schiavone, Xiaodong Wang
Summary: This paper presents a study on the propagation characteristics of surface waves in an elastic metamaterial with local rotational effects. It is found that the surface wave in this material exhibits dispersion, even when the effect of local rotation is relatively weak. The phase velocity of the surface wave falls between the classical Rayleigh wave and the shear wave, and particles on the free surface of the material move in an elliptical fashion similar to the classical Rayleigh wave propagation.
MATHEMATICS AND MECHANICS OF SOLIDS
(2023)
Article
Engineering, Civil
R. Gagliardo, F. P. A. Portioli, L. Cascini, R. Landolfo, P. B. Lourenco
Summary: This paper presents a method for vulnerability assessment of historic masonry structures subjected to settlements using rigid block modelling. The displacement capacity in the large displacement regime is evaluated by push-down analysis. A variational formulation of the rigid block model is adopted, reducing computational costs. Validation against experimental campaigns and tests from literature was conducted, showing the effectiveness of the proposed method.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Francesco P. A. Portioli, Michele Godio, Chiara Calderini, Paulo B. Lourenco
Summary: This study proposes a rigid block model for the displacement-based seismic assessment of local collapse mechanisms of masonry structures. The masonry is modeled as an assembly of two-dimensional rigid blocks in contact through frictional interfaces, and mathematical programming is used to solve the contact problems associated with elastic and rigid contact models. The research evaluates the accuracy of the modeling approach in reproducing the pushover curve of masonry panels subjected to horizontal seismic loads.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Mechanics
Andrea Bacigalupo, Luigi Gambarotta
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2016)
Editorial Material
Mechanics
Luigi Gambarotta
Article
Mechanics
Andrea Bacigalupo, Luigi Gambarotta
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2017)
Correction
Materials Science, Multidisciplinary
Andrea Bacigalupo, Luigi Gambarotta
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2017)
Article
Materials Science, Multidisciplinary
Andrea Bacigalupo, Luigi Gambarotta
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2017)
Article
Mechanics
F. Vadala, A. Bacigalupo, M. Lepidi, L. Gambarotta
COMPOSITE STRUCTURES
(2018)
Article
Engineering, Mechanical
Andrea Bacigalupo, Luigi Gambarotta
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2019)
Article
Mechanics
Andrea Bacigalupo, Luigi Gambarotta, Marco Lepidi, Francesca Vadala
Article
Materials Science, Multidisciplinary
Andrea Bacigalupo, Marco Lepidi, Giorgio Gnecco, Francesca Vadala, Luigi Gambarotta
FRONTIERS IN MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Ferdinando Auricchio, Andrea Bacigalupo, Luigi Gambarotta, Marco Lepidi, Simone Morganti, Francesca Vadala
MATERIALS & DESIGN
(2019)
Article
Operations Research & Management Science
Andrea Bacigalupo, Giorgio Gnecco, Marco Lepidi, Luigi Gambarotta
JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS
(2020)
Article
Engineering, Multidisciplinary
Andrea Bacigalupo, Luigi Gambarotta
Summary: This paper focuses on dynamic homogenization of lattice-like materials with lumped mass at nodes to obtain energetically consistent models for accurate descriptions of the discrete system's acoustic behavior. By utilizing proper mapping and enhanced continualization, equivalent continuum models with non-local terms are derived, achieving energy-consistent differential equations for effective representation of the system's behavior.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2021)
Proceedings Paper
Engineering, Civil
Andrea Bacigalupo, Luigi Gambarotta
X INTERNATIONAL CONFERENCE ON STRUCTURAL DYNAMICS (EURODYN 2017)
(2017)
Article
Engineering, Multidisciplinary
Andrea Bacigalupo, Giorgio Gnecco, Marco Lepidi, Luigi Gambarotta
COMPOSITES PART B-ENGINEERING
(2017)