Results 21 to 30 of about 2,314,785 (187)

Direct numerical simulation of wave propagation in saturated random granular packings using coupled LBM-DEM [PDF]

EPJ Web of Conferences, 2021
Poroelasticity theory predicts wave velocities in a saturated porous medium through a coupling between the bulk deformation of the solid skeleton and porous fluid flow.
Cheng Hongyang, Luding Stefan, Harting Jens, Magnanimo Vanessa   +3 more
doaj   +1 more source

Correlation of BAW and SAW properties of langasite at elevated temperatures [PDF]

Journal of Sensors and Sensor Systems, 2015
The full set of electromechanical data of langasite (La3Ga5SiO14) is determined in the temperature range from 20 to 900 °C using differently oriented bulk acoustic wave resonators.
M. Schulz, E. Mayer, I. Shrena, D. Eisele, M. Schmitt, L. M. Reindl, H. Fritze   +6 more
doaj   +1 more source

Rock physics model for velocity—pressure relations and its application to shale pore pressure estimation

Petroleum Exploration and Development, 2023
Acoustic wave velocity has been commonly utilized to predict subsurface geopressure using empirical relations. Acoustic wave velocity is, however, affected by many factors. To estimate pore pressure accurately, we here propose to use elastic rock physics
Jingyi GUO, Min LI, Mingwei ZHUANG, Yuefeng SUN   +3 more
doaj   +1 more source

Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure

Scientific Reports, 2017
Pressure-induced polyamorphism in Ce-based metallic glass has attracted significant interest in condensed matter physics. In this paper, we discover that in association with the polyamorphism of La32Ce32Al16Ni5Cu15 bulk metallic glass, the acoustic ...
Xintong Qi, Yongtao Zou, Xuebing Wang, Ting Chen, David O. Welch, Jianzhong Jiang, Baosheng Li   +6 more
doaj   +1 more source

Aluminum scandium nitride thin-film bulk acoustic resonators for 5G wideband applications

Microsystems & Nanoengineering, 2022
Bulk acoustic wave (BAW) filters have been extensively used in consumer products for mobile communication systems due to their high performance and standard complementary metal-oxide-semiconductor (CMOS) compatible integration process.
Yang Zou, Chao Gao, Jie Zhou, Yan Liu, Qinwen Xu, Yuanhang Qu, WenJuan Liu, Jeffrey Bo Woon Soon, Yao Cai, Chengliang Sun   +9 more
doaj   +1 more source

Design of a broadband acousto-optic filter using bulk acoustic wave beam steering with an interdigital transducer

Results in Physics
Acousto-optic tunable filters are photonics devices whose operation is fundamentally based on crystal acoustics. One of the phenomena used to improve performances of bulk acousto-optic devices is acoustic beam steering.
Konstantin B. Yushkov, Natalya F. Naumenko, Vladimir Ya. Molchanov   +2 more
doaj   +1 more source

The multi-physics metawedge: graded arrays on fluid-loaded elastic plates and the mechanical analogues of rainbow trapping and mode conversion

New Journal of Physics, 2018
We consider the propagation and mode conversion of flexural-acoustic waves along a fluid-loaded graded array of elastic resonators, forming a metasurface.
E A Skelton, R V Craster, A Colombi, D J Colquitt   +3 more
doaj   +1 more source

An Investigation on Efficient Acoustic Energy Reflection of Flexible Film Bulk Acoustic Resonators

Nanotechnology and Precision Engineering, 2018
: This paper investigates the issues on acoustic energy reflection of flexible film bulk acoustic resonators (FBARs). The flexible FBAR was fabricated with an air cavity in the polymer substrate, which endowed the resonator with efficient acoustic ...
Chuanhai Gao, Yuan Jiang, Lin Zhang, Bohua Liu, Menglun Zhang   +4 more
doaj   +1 more source

Dispersion Diagram of Trigonal Piezoelectric Phononic Structures with Langasite Inclusions

Crystals, 2021
The dispersion relation of elastic Bloch waves in 1-3 piezoelectric phononic structures (PPnSs) with Langasite (La3Ga5SiO14) inclusions in a polymeric matrix is reported.
Edson Miranda, Clodualdo Aranas, Samuel Rodrigues, Hélio Silva, Gedeon Reis, Antônio Paiva, José Dos Santos   +6 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source