A5076883312- Ultrasonics and Acoustic Wave Propagation
- Non-Destructive Testing Techniques
- Acoustic Wave Resonator Technologies
- Geophysical Methods and Applications
- Fatigue and fracture mechanics
- Thermography and Photoacoustic Techniques
- Structural Health Monitoring Techniques
- Material Properties and Failure Mechanisms
- Acoustic Wave Phenomena Research
- Engineering Applied Research
- Metamaterials and Metasurfaces Applications
- Advanced Sensor and Energy Harvesting Materials
- Microwave Imaging and Scattering Analysis
- Welding Techniques and Residual Stresses
- Ultrasound Imaging and Elastography
- Adhesion, Friction, and Surface Interactions
- Speech and Audio Processing
- Mechanical Behavior of Composites
- Smart Materials for Construction
- Flow Measurement and Analysis
- Surface Treatment and Residual Stress
- High voltage insulation and dielectric phenomena
- Photorefractive and Nonlinear Optics
- Aerodynamics and Acoustics in Jet Flows
- Mechanical and Optical Resonators
East China University of Science and Technology
2016-2025
Chongqing University
2019
PLA Army Service Academy
2012-2018
The early deformations in materials such as creep, plasticity, and fatigue damages have been proved to a close relationship with the nonlinear effect of ultrasonic waves propagating them. In present paper, theoretical mesoscale model an non-destructive method has proposed evaluate creep deformed states based on guided waves. developed here considers generation Lamb response from precipitates variation dislocation network, which can be applicable all precipitate stages including coherent...
Abstract Advanced transducer materials have become increasingly important with the rapid development of internet things and flexible electronics. Herein, fully transparent polyvinylidene fluoride/polydimethylsiloxane (PVDF/PDMS) composite piezoelectric films are fabricated using scrape coating techniques based on electrospun PVDF nanofiber films. Compared to PVDF, PVDF/PDMS not only owns high transparency a more uniform stable structure but also has superior properties. Based films, sensors...
Within the second-order perturbation approximation, physical process of cumulative second-harmonic generation by primary Lamb wave propagation has been investigated in time domain. Based on preconditions that transfer energy from to double frequency is not zero and phase velocity matching condition satisfied, we focus analyzing influence mismatching group velocities second harmonic a tone burst with finite duration. Our analysis indicates time-domain envelope generated dependent distance...
In this work, we analyze theoretically and observe experimentally the frequency mixing response induced by collinear interaction of two primary Lamb waves with different frequencies in an isotropic homogenous plate. The internal resonance conditions for generating combined harmonics are analyzed using a perturbation approach normal-mode-expansion technique waveguide excitation. second- third-order generated wave propagating specimen analyzed, existence at specific is predicted. An...
Online and offline monitoring of composite bolted joints under tensile load were investigated using piezoelectric transducers. The relationships between Lamb wave signals, pre-tightening force, the applied load, as well failure modes investigated. Results indicated that S0/A0 amplitudes decrease with increasing load. Relationships damage features mode built based on finite element (FE) simulation experimental results. possibility application wave-based structure health in joint-like...
Metasurfaces, consisting of subwavelength-thickness units with different wave responses, provide an innovative possible method to manipulate elastic and acoustic waves efficiently. The application metasurfaces on-chip surface (SAW) at sub-GHz frequencies requires further exploration since their functions are highly demanded in nanoelectromechanical systems (NEMS), sensing, communications, microfluid control quantum processing. Here, the experimental realization SAW is reported, gradient...
Ferroelectrets (also called piezoelectrets) are relatively young members in the family of piezo-, pyro- and ferroelectric materials. They exhibit ferroic behaviour phenomenologically undistinguishable from that traditional ferroelectrics, although materials per se essentially non-polar space-charge electrets with artificial macroscopic dipoles (i.e. internally charged cavities). Since ferroelectrets not only represent a scientific curiosity but also have great application potential, they...
Localization of fatigue cracks imposes immense significance to ensure the health engineering structures and prevent further catastrophic accidents. The nonlinear ultrasonic waves, especially Lamb have been increasingly studied employed for identifying micro-damages that are usually invisible traditional linear waves. However, it remains a challenge locate using waves owing enormous difficulties in decoding location information from acoustic nonlinearity. Motivated by this, this work presents...