Review
Chemistry, Multidisciplinary
Wei Li, Yunqi Cao, Chuan Wang, Nelson Sepulveda
Summary: Bioengineering devices and systems will become practical and versatile technology when sustainability issues are addressed. The ferroelectret nanogenerator (FENG) has emerged as a promising strategy for bidirectional energy conversion between electrical and mechanical domains. This comprehensive overview focuses on integrating FENGs in bioengineering systems, highlighting the applications with the most potential and current constraints.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Physics, Applied
Zehai Ruan, Qianqian Hu, Mi Zhang, Weilin Liu, Guodong Zhu, Min Chen, Xiaoqing Zhang
Summary: Polypropylene (PP) ferroelectret films with a human skin-like texture are prepared using a simple procedure. These films exhibit lightweight, light transmittance, small thickness, stretchability, as well as significant piezoelectric activity. The films have a double-level cellular structure with distributed tight junctions and dipolar charges deposited on the inner walls of cells. The preliminary results show promising piezoelectric performance, and the films also have potential applications in flexible electronics.
APPLIED PHYSICS LETTERS
(2023)
Article
Acoustics
Jiawei Yu, Long Xu
Summary: In this study, the theoretical design and analysis of the sandwich piezoelectric ultrasonic transducer were conducted, taking into account the nonlinear state and losses at high power. A nonlinear equivalent model was established by introducing the nonlinear parameters of the piezoelectric materials, and consistent results were obtained by comparing different methods.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Construction & Building Technology
Mohammed Aslam, Praveen Nagarajan, Mini Remanan
Summary: Nonlinear wave mixing is a potential method for evaluating localized micro-damage in structures, offering unique advantages over nonlinear ultrasonic techniques. It can be used to detect and localize subsurface cracks in concrete structures.
STRUCTURAL CONTROL & HEALTH MONITORING
(2022)
Article
Engineering, Mechanical
Xiang Li, PengTao Guo, Yuan Ding, Zhiwei Chen, Xu Wang, Qibao Lv
Summary: This work develops a generalized electromechanical coupled model for characterizing standing-wave linear ultrasonic motors (SWLUMs). The model includes a four-terminal equivalent circuit model for the first-stage energy conversion and a friction-driven system for the second-stage energy conversion. The effectiveness of the model is demonstrated through simulations and discussions on a classical SWLUM.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Physics, Applied
Andres Jenaro Lopez Garcia, Mireille Mouis, Thomas Jalabert, Alessandro Cresti, Gustavo Ardila
Summary: This study investigated the relationship between the electromechanical response of semiconducting piezoelectric nanowires (NWs) and their length. A new mechanism of piezoresponse saturation was identified, which resulted from the combined influence of interface traps and piezoelectric polarization in the depleted NW. The results of this study were in better qualitative agreement with experimental observations compared to existing theories. The finite element method was used to simulate the mechanical, piezoelectric, and semiconductor properties of the NWs, with simulations focusing on uniform ZnO NWs grown along the c-axis. An analytical model was developed to support the analysis and provided trends of saturation length and piezoresponse as a function of NW dimensions, doping level, surface traps density, crystal polarity, and external pressure.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Acoustics
Guy Feuillard, L. P. Tran Huu Hue, Naoufal Saadaoui, Van Thien Nguyen, Marc Lethiecq, Jean Francois Saillant
Summary: This work focuses on the electroacoustic modeling and characterization of symmetric reflector ultrasonic transducers (SRUTs), showing that the optimal acoustic impedance of the matching layer should be lower than conventional transducers for a wider bandwidth. Characterization of such transducers based on piezoceramic plates reveals bandwidth and sensitivity close to simulation results, indicating the need for new design rules compared to conventional transducers.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2021)
Article
Engineering, Electrical & Electronic
Jingjie Cheng, Zhaoliang Peng, Penghui Song, Bo Peng, Jason J. Gorman, Justin Kuo, Amit Lal, Wenming Zhang, Lei Shao
Summary: In this work, a newly developed optical imaging method was used to study the acoustodynamic physics in gigahertz unreleased ultrasonic transducers based on an AlN-on-silicon system. The study revealed the phenomena of mode superposition, anisotropic transduction, and dynamic mode evolution, highlighting the importance of shear motion in anisotropic transduction.
IEEE ELECTRON DEVICE LETTERS
(2022)
Review
Acoustics
Salvatore A. Pullano, Costantino Davide Critello, Maria Giovanna Bianco, Michele Menniti, Antonino S. Fiorillo
Summary: This article presents a review on the application and development of PVDF technology in the manufacturing of in-air ultrasonic transducers, which are widely used in medical robotics, sonar systems, and automation industry. The goal is to provide a comprehensive view on the development of such ultrasonic transducers, highlighting the constructive choices and the advantages/disadvantages.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2021)
Article
Acoustics
P. Shanmugam, L. Iglesias, J. F. Michaud, D. Alquier, L. Colin, I. Dufour, D. Certon
Summary: This study aimed to develop ultra-wide bandwidth air-coupled capacitive micromachined ultrasonic transducers (CMUTs) for binary gas mixture analysis, based on time-of-flight (ToF) measurements to monitor gas ultrasound velocity variations. The proposed technique showed promising results in detecting CO2/N2 and H2/N2 gas mixtures, with a measured limit of detection (LOD) of 0.3% for CO2 in N2 and 0.15% for H2 in N2, demonstrating high detection sensitivity.
Article
Engineering, Electrical & Electronic
Fabio Isaac Ferreira, Paulo Roberto de Aguiar, Rosemar Batista da Silva, Mark James Jackson, Fabricio Guimaraes Baptista, Eduardo Carlos Bianchi
Summary: This paper introduces the application of electromechanical impedance (EMI) sensors in the metal-cutting industry. By attaching low-cost piezoelectric diaphragms to each workpiece, the correlation between EMI measurements and surface quality can be monitored and verified. The results show a significant correlation between EMI measurement and surface roughness, indicating the promising potential of this monitoring system.
IEEE SENSORS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Xiaoyuan Wei, Yuan Yang, Ling Huang, Yongyong Hui
Summary: This article investigates the effect of acoustic load on the electromechanical characteristics of sandwiched piezoelectric ultrasonic transducers, finding that when the length of the acoustic load is a positive integer multiple of half-wavelength, the first resonant frequencies show a smaller increase. Additionally, as the length and characteristic impedance of the acoustic load increase, the first resonant frequencies and the tailing length of the received signal increase while the receiving signal amplitude, effective electromechanical coupling coefficient, and mechanical quality factor decrease.
Article
Automation & Control Systems
Andrew Keller, Braden Robinson, Alejandro Draper, Amanda White, Joshua Daw, Zhangxian Deng
Summary: Real-time and reliable temperature measurement on nuclear fuels is crucial for the safe operation of reactors. This study developed an ultrasonic thermometer using magnetostrictive materials, which can detect nuclear fuel cladding temperature from a long distance. The Galfenol-based UT outperforms previous UTs based on iron-cobalt-vanadium alloys.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Article
Engineering, Aerospace
Dimitris Varelis, Dimitris A. Saravanos
Summary: This paper investigates the nonlinear electromechanical response of shallow piezoelectric laminated shells under mechanical pressure loads, predicting the transition between stable and unstable states using a coupled nonlinear mechanics model. The results demonstrate the predictive capability and complexity of the electromechanical behavior of the shells.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Automation & Control Systems
Chang Peng, Mengyue Chen, Hongchao Wang, Jian Shen, Xiaoning Jiang
Summary: This research first designed a multi-layer under-display ultrasonic fingerprint sensor structure, which was theoretically analyzed and fabricated with high resolution and sensitivity to meet the requirements of under-display ultrasonic fingerprint imaging applications, as tested with a custom-made fingerprint-mimicking phantom. The results suggest that the 20 MHz broadband PZT-based multilayer structure holds great potential for under-display ultrasonic fingerprint sensor applications.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
V Bovtun, D. Nuzhnyy, M. Kempa, T. Ostapchuk, V Skoromets, J. Suchanicz, P. Czaja, J. Petzelt, S. Kamba
Summary: By studying the solid solution ceramics, it was found that the dielectric response characteristics of BT-100x%PMN ceramics exhibit features of diffuse phase transition rather than relaxor ferroelectricity.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Polymer Science
Julian Kattinger, Sebastian Joas, Fabian Willems, Marc Kreutzbruck, Christian Bonten
Summary: This study investigates the orientation of differently shaped particle mixtures in polymer suspensions for different fluid channel geometries. The interaction coefficient showed a significant increase at a filling level of 5%, and it was demonstrated that a balanced mixing ratio yields higher interaction coefficients. The qualitative effects of the interaction between fibers and platelets on orientations were successfully demonstrated through simulations.
JOURNAL OF POLYMER ENGINEERING
(2021)
Article
Materials Science, Characterization & Testing
Julian Ehrler, Alexander Solodov, Marc Kreutzbruck
Summary: The study evaluated the application of a nonlinear acoustic method for reconstructing stress-strain curves and quantifying ultimate tensile strength for different orientations of composite materials. Results showed that adjustments are needed for directly applying nonlinear acoustic data in quasi-static tensile conditions. The approach was validated using data from two in-plane orientations of CFRP with different strengths, and a quantitative proof-of-concept test was conducted based on measuring acoustic nonlinearity for the out-of-plane orientation CFRP. The higher nonlinearity measured correlated with the lowest strength in this orientation, which was attributed to characteristic materials damage in the form of delaminations.
RESEARCH IN NONDESTRUCTIVE EVALUATION
(2022)
Article
Acoustics
I. Solodov, M. Kreutzbruck
Summary: In recent years, Local Defect Resonance (LDR) has gained interest for its applications in non-destructive testing (NDT) and imaging of planar defects in composite materials, focusing on delaminations and impacts. This paper examines the mechanism and attributes of LDR for through-thickness cracks in plates, validating that it is caused by the resonance of edge waves along crack faces. The edge wave resonance features weak field decay, partial and high-order LDR, providing clear opportunities for NDT techniques based on acoustic activation of damage.
Article
Polymer Science
Julia Resch, Julia Dreier, Christian Bonten, Marc Kreutzbruck
Summary: This study investigated the phase separation of PMMA/SAN blends using a novel nanoscale AFM-IR technique, which allowed for the chemically identification and precise classification of phase morphology within the nm-regime. The research showed that in the miscible domain, no individual phases could be detected down to the nanometer range, but with increasing temperature, two different phases were formed with sharply defined boundaries. The onset of these changes was identified at temperatures around 100°C.
Review
Chemistry, Multidisciplinary
Igor Solodov, Yannick Bernhardt, Marc Kreutzbruck
Summary: The article discusses two different acoustic emission modes for nondestructive testing, one based on defects generating acoustic waves at resonant frequency, and the other using noise-like signals for wideband activation. These methods are applicable to detect and image various defects in composites, with full-field imaging achieved through an array of microphones.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Composites
Igor Solodov, Yannick Bernhardt, Linus Littner, Marc Kreutzbruck
Summary: Stiffness anisotropy is a natural characteristic of composite materials with a fibrous structure. It can have both positive and negative effects depending on the application. Methods for accurately evaluating elastic anisotropy and fiber orientation are needed to control the flexibility of the material architecture. Ultrasonic waves are used to analyze and monitor anisotropy and fiber fields in plate-shaped composite profiles, and to map fiber orientation in injection molding composites. The birefringent acoustic field provides information on stiffness anisotropy and can be used to characterize damage caused by impact and mechanical stress in composites.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Materials Science, Composites
R. Czichos, Y. Bernhardt, J. Dittmann, P. Middendorf, M. Kreutzbruck
Summary: This study investigates the formation and influence of micro-damage in glass fibre-reinforced plastics (GFRP) through numerical and experimental investigations. It is found that a [0 degrees/90 degrees] layup is the most suitable to generate reproducible micro-damage in the 90 degrees layers. The study also reveals that transverse loading causes a significant loss of shear stiffness and strength.
COMPOSITES PART C: OPEN ACCESS
(2023)
Article
Acoustics
Igor Solodov, Mike Kornely, Jens Philipp, Elisabeth Stammen, Klaus Dilger, Marc Kreutzbruck
Summary: Kissing bonds in adhesive joints are recognized as invisible defects in conventional ultrasonic testing. This study examines the recognition of kissing bonds in automotive industry-relevant aluminum lap-joints using a nonlinear laser vibrometry approach. The results show that the linear ultrasound method is unable to distinguish minor contact softening caused by kissing bonds, while the nonlinear approach can detect these troublesome defects with high sensitivity.
Article
Physics, Applied
V. Laguta, V. Bovtun, M. Kempa, O. Laguta, P. Neugebauer, M. Simenas, J. Banys, S. Kamba
Summary: The study investigates the effect of quantum paraelectrics, such as KTaO3 and SrTiO3, on the local electric and magnetic field components of microwaves for Fe3+ and Mn2+ paramagnetic ions. It is found that the high dielectric permittivity of these materials amplifies the microwave fields, allowing for spin manipulation at lower power levels. This eliminates the need for expensive high-power microwave equipment and enables the use of quantum paraelectrics as substrates for deposition of nanoparticles or films, which can be manipulated by low-power microwave pulses.
APPLIED PHYSICS LETTERS
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Yurii Yakimenko, Sergii Stirenko, Dimitri Koroliouk, Yuri Gordienko, Fabio Massimo Zanzotto
Summary: Artificial intelligence can automate and accelerate computer-aided detection and diagnosis in medicine, potentially transforming the treatment of complex diseases. The challenge lies in gaining acceptance and understanding from the clinical community.
SOFT COMPUTING FOR SECURITY APPLICATIONS, ICSCS 2022
(2023)
Article
Materials Science, Multidisciplinary
D. Nuzhnyy, V. Bovtun, E. Buixaderas, J. Petzelt, M. Savinov, M. Kempa, M. Pasciak, I. Rafalovskyi, V. Chelod Paingad, P. Kuzel, S. Kamba, D. Repcek, A. Pashkin, V. A. Trepakov, Z. Trybula
Summary: The properties of K1-xLixTaO3 crystals were studied using a multiexperimental approach, revealing the percolative nature of the FE transition, the inherent inhomogeneity of the FE phase, and the coexistence of FE and relaxor regions. Different excitations were identified in the dielectric response of the crystals, assigned to various parts of the sample.
Proceedings Paper
Computer Science, Artificial Intelligence
Julian Ehrler, Alexander Solodov, Yannick Bernhardt, Marc Kreutzbruck
Summary: The study evaluates the nonlinear acoustic approach for reconstructing stress-strain curves and quantifying ultimate tensile strength, using polynomial stress-strain expansion and nonlinear parameters calculation. It solves the issue of unknown third-order nonlinearity parameters for most materials by employing an iteration scheme to obtain closer approximations to experimental data. The solution to the inverse problem identifies the range of nonlinearity parameters for a given tensile strength and categorizes the contribution of quadratic and cubic nonlinearities in mechanical response for different materials.
PROCEEDINGS OF 2021 48TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION (QNDE2021)
(2021)
Article
Construction & Building Technology
Yannick Bernhardt, Dmitry Solodov, Dieter Mueller, Marc Kreutzbruck
FRONTIERS IN BUILT ENVIRONMENT
(2020)
Article
Instruments & Instrumentation
Yannick Bernhardt, Marc Kreutzbruck
JOURNAL OF SENSORS AND SENSOR SYSTEMS
(2020)
