Acoustic Applications of a Foamed Geopolymeric-Architected Metamaterial DOI Creative Commons
Giuseppe Ciaburro, Gino Iannace, Laura Ricciotti

и другие.

Applied Sciences, Год журнала: 2024, Номер 14(3), С. 1207 - 1207

Опубликована: Янв. 31, 2024

The paper compares and evaluates the influence of presence perforations on sound absorption coefficient (SAC) a negative stiffness metamaterial based foamed ceramic geopolymer. Chemical–physical, microstructural, dynamic–mechanical, characterisations are presented. A rigid, lightweight geopolymeric porous material has been prepared using an inorganic/organic monomeric mixture containing oligomeric sialates siloxanes with aluminium powder. This process results in amorphous rigid light foam apparent 180 Kg/m3 density 78% open-pore. viscoelastic characterisation by dynamic mechanical analysis (DMA) carried out from 10−3 to 103 Hz indicates behaviour enabling ultrahigh energy at straining frequencies 300 1000 Hz. loss factor (the ratio dissipative/elastic shear moduli) is about 0.03 (essentially elastic behaviour) for up 200 suddenly increase value six (highly dissipative behaviour). corresponding storage moduli were 8.2 MPa 20 MPa, respectively. Impedance tube acoustic measurements perforated unperforated specimens highlighted role perforation-resonant cavities enhancing efficiency, particularly within specified frequency band where mass geopolymer matrix magnifies dissipation effect. In limits still exploratory comparative study, we aimed verify technological transfer potentiality architected metamaterials sustainable building practices.

Язык: Английский

Large deformation behavior and energy absorption of rotating square auxetics DOI
Fereshteh Hassani, Zia Javanbakht, Sardar Malek

и другие.

Composites Part B Engineering, Год журнала: 2024, Номер 283, С. 111596 - 111596

Опубликована: Июнь 5, 2024

Язык: Английский

Процитировано

13

A novel bi-material tubular metamaterial with twist effects under thermal and uniaxial loads DOI

Beicheng Lin,

Fucong Lu, Weijia Li

и другие.

International Journal of Solids and Structures, Год журнала: 2024, Номер 295, С. 112821 - 112821

Опубликована: Апрель 10, 2024

Язык: Английский

Процитировано

12

Geometric effects on impact mitigation in architected auxetic metamaterials DOI Creative Commons
Til Gärtner, Sanne J. van den Boom,

J. Weerheijm

и другие.

Mechanics of Materials, Год журнала: 2024, Номер 191, С. 104952 - 104952

Опубликована: Фев. 20, 2024

Lightweight materials used for impact mitigation must be able to resist and absorb the maximum amount of energy from impactor. Auxetic have potential achieve high resistance by drawing material into zone providing higher indentation shear resistance. However, these artificially designed, large deformation dynamic effects created structures taken consideration when deciding on a protection concept. Despite their promise, little attention has been given understanding working mechanisms high-rate finite architected auxetic lattice structures. This study compares static elastic properties different with honeycomb structure, typical non-auxetic lattice, at equivalent mass stiffness levels. In this study, we limit investigation behavior do not consider contact between beams lattices. It is demonstrated that individual lattices an undeformed state are insufficient explain variations observed in situations. particular, initial Poisson's ratio does determine ability structure impact. To gain thorough comprehension overall during localized, rate compression, evolution tangent under compression was monitored, leading more profound understanding. Observations made one configuration replicated analyzed related configurations.

Язык: Английский

Процитировано

10

Comparison of in-plane compression of additively manufactured Ti6Al4V 2D auxetic structures: Lattice design, manufacturing speed, and failure mode DOI Creative Commons
Zana Eren, Ozkan Gokcekaya,

Demet Balkan

и другие.

Materials & Design, Год журнала: 2024, Номер 241, С. 112885 - 112885

Опубликована: Март 27, 2024

The metal-based 2D auxetic lattice structures hold the potential for multifunctional tasks in aerospace applications. However, compression response of those manufactured by powder bed fusion process is underexplored. This study proposes a comprehensive comparison in-plane quasi-static performance structures, utilizing three designs (anti-tetrachiral (ATC), double arrow-headed (DAH), and tree-like re-entrant (TLR)), with stiff Ti6Al4V electron beam (PBF-EB) various manufacturing speeds. results revealed unique failure patterns superior energy absorptions among literature. TLR design enhanced absorption overcoming failures between DAH columns exhibited lowest standard deviations specific (SEA) values (9.75 %–12.62 %). Besides, Kernel average misorientation (KAM) followed order DAH, TLR, ATC, inversely correlated SEA values. ATC KAM outperformed 47.5 % 6.44 %, respectively. Scan speed variations affected porosity differently each while exhibiting similar microstructure characteristics. findings this propose significant contribution to development sandwich where harsh environments exist employment topologies are required.

Язык: Английский

Процитировано

10

Investigation on the energy absorption characteristics of novel graded auxetic re-entrant honeycombs DOI
Zhaohui Zhang, Yuhang Gu, HengAn Wu

и другие.

Composite Structures, Год журнала: 2024, Номер 352, С. 118633 - 118633

Опубликована: Окт. 9, 2024

Язык: Английский

Процитировано

10

In-plane mechanical behavior of tri-chiral and anti-trichiral auxetic cellular structures DOI
Anurag Gupta, Shubham Sharma, Rohit Raju Madke

и другие.

International Journal of Mechanical Sciences, Год журнала: 2025, Номер 289, С. 110054 - 110054

Опубликована: Фев. 21, 2025

Язык: Английский

Процитировано

2

Enhancing piezoelectric energy harvesters with rotating triangular auxetic structures DOI
Xiaofan Zhang, Xiaobiao Shan,

Guangdong Sui

и другие.

International Journal of Mechanical Sciences, Год журнала: 2025, Номер unknown, С. 110081 - 110081

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

1

Nonlinear vibrations of auxetic honeycomb thin plates based on the modified Gibson functions DOI
Yunfei Liu, Zhaoye Qin, Fulei Chu

и другие.

Thin-Walled Structures, Год журнала: 2023, Номер 193, С. 111259 - 111259

Опубликована: Окт. 10, 2023

Язык: Английский

Процитировано

23

Experimental techniques for performance evaluation of shielding materials and configurations subjected to Blast and Ballistic impacts: A State-of-the-Art Review DOI
Anand Pai, Marcos Rodríguez-Millán,

Masuhiro Beppu

и другие.

Thin-Walled Structures, Год журнала: 2023, Номер 191, С. 111067 - 111067

Опубликована: Авг. 17, 2023

Язык: Английский

Процитировано

22

Dynamic crushing and energy absorption of bio-inspired shear thickening fluid-filled origami metastructure DOI Creative Commons
Lalin Lam, Wensu Chen, Hong Hao

и другие.

Engineering Structures, Год журнала: 2023, Номер 299, С. 117122 - 117122

Опубликована: Ноя. 14, 2023

In this study, a novel approach is proposed to enhance the crushing efficiency and energy-absorbing performance of origami metastructure by incorporating shear thickening fluid (STF), which mimics existence viscoelastic material found inside protective mechanism in nature. The dynamic performances STF-filled are numerically investigated using commercial software LS-DYNA. A fluid-structure interaction (FSI) technique employed simulate coupling between structure parts infilled fluid. (STF-OM) compared with non-filled viscous fluid-filled counterparts under various velocities. effects filled height STF, viscosity folding angle on STF-OM also investigated. It that can generate higher more steady force without inducing significantly high initial peak force. Its resistance capability increase velocity, demonstrating its adaptive for impact scenarios. as well angle, affect structure.

Язык: Английский

Процитировано

22