Dr. Hanfei Mei Profile

Dr. Hanfei Mei

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Publications (7)

Proceedings Article | 22 March 2021 Presentation + Paper

Pure SH0 wave tomography for delamination detection in aerospace composites

Hanfei Mei, Robin James, Victor Giurgiutiu

Proceedings Volume 11593, 115930P (2021) https://doi.org/10.1117/12.2582877

KEYWORDS: Composites, Tomography, Aerospace engineering, Wave plates, Ultrasonography, Inspection, Damage detection, X-rays, X-ray imaging, Waveguides

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Proceedings Article | 2 June 2020 Presentation + Paper

SH-mode guided-wave impact damage detection in thick quasi-isotropic composites

Robin James, Hanfei Mei, Victor Giurgiutiu

Proceedings Volume 11381, 113810R (2020) https://doi.org/10.1117/12.2559757

KEYWORDS: Composites, Acquisition tracking and pointing, Transducers, Damage detection, Manufacturing, Inspection, Structural health monitoring, Phased arrays, Waveguides, Distance measurement

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Due to the extensive use of composite materials in aerospace structures, they are highly susceptible to various types of damage including barely visible impact damage (BVID) due to low-velocity impact events such as bird strikes and runway debris. Implementation of guided-wave based structural health monitoring (SHM) for BVID detection in composites has been extremely challenging due to the anisotropic nature of composites and the complex wave-damage interaction with impact damage. This paper presents a new methodology for the detection of BVID in composites using selectively pure shear horizontal (SH) guided wave mode generated by angle beam transducers (ABT) and received by phased array transducers (PAT). In this methodology, pure SH0 wave excitation was achieved using the angle beam transducers and variable angle wedges and after propagation in the composite it was received by the phased array transducer. First, the semi-analytical finite element (SAFE) method was used to generate the guided wave dispersion curves and the corresponding tuning angle for the SH0 mode excitation was obtained based on Snell’s law. Then, pitch-catch experiments using the ABT-PAT transducer pair were conducted to validate the pure SH0 mode excitation. After this, impact damage experiments were conducted on multiple quasi-isotropic carbon fiber reinforced polymer (CFRP) composite plates having different thicknesses by conforming to the ASTM D7136 standard to generate controlled impact damage size of 1". Next, impact damage detection experiments using pure SH0 mode at 500 kHz, were conducted using the ABT-PAT transducer pair. It was observed that pure SH0 mode was sensitive to the impact damage as a significant decrease in the signal amplitude and mode conversion was observed. With our experiments, we demonstrated the validity and usefulness of this technique for impact damage detection in composite structures. An invention disclosure describing the use of angle beam transducers for SH wave excitation method has been filed and is in the process of becoming a provisional patent.

Proceedings Article | 18 May 2020 Presentation + Paper

Simulation of guided wave under varying temperature and load conditions

Chong Cheng, Hanfei Mei, Victor Giurgiutiu, Shenfang Yuan, Fang Fang, Robin James

Proceedings Volume 11381, 113810H (2020) https://doi.org/10.1117/12.2559702

KEYWORDS: Waveguides, Phase velocity, Wave propagation, Aluminum, Structural health monitoring, Temperature metrology, Transducers, Finite element methods, Receivers, Dispersion

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Proceedings Article | 22 April 2020 Presentation + Paper

Damage detection in laminated composites using pure SH guided wave excited by angle beam transducer

Hanfei Mei, Robin James, Victor Giurgiutiu

Proceedings Volume 11381, 113810P (2020) https://doi.org/10.1117/12.2559558

KEYWORDS: Composites, Transducers, Wave plates, Waveguides, Damage detection, Structural health monitoring, Transmitters, Inspection, 3D modeling, Wave propagation

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Proceedings Article | 1 April 2019 Presentation + Paper

Wave damage interaction in metals and composites

Hanfei Mei, Victor Giurgiutiu

Proceedings Volume 10972, 109720O (2019) https://doi.org/10.1117/12.2513548

KEYWORDS: Finite element methods, Composites, Scattering, Waveguides, Metals, 3D modeling

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Proceedings Article | 27 March 2018 Presentation + Paper

Predictive 1D and 2D guided-wave propagation in composite plates using the SAFE approach

Hanfei Mei, Victor Giurgiutiu

Proceedings Volume 10600, 106000P (2018) https://doi.org/10.1117/12.2296566

KEYWORDS: Composites, Wave propagation, Waveguides, Dispersion, Phase velocity, Chemical elements, Finite element methods, Structural health monitoring, Aluminum, Mathematical modeling

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Proceedings Article | 27 March 2018 Paper

Piezoelectric wafer active sensors under gamma radiation exposure toward applications for structural health monitoring of nuclear dry cask storage systems

Mohammad Faisal Haider, Hanfei Mei, Bin Lin, Lingyu Yu, Victor Giurgiutiu, Poh-Sang Lam, Christopher Verst

Proceedings Volume 10599, 105992F (2018) https://doi.org/10.1117/12.2297390

KEYWORDS: Transducers, Gamma radiation, Ferroelectric materials, Structural health monitoring, Capacitance, Semiconducting wafers, Active sensors, Crystals, Sensors, Radiation effects

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Showing 5 of 7 publications

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