The feasibility of utilizing focused ultrasonic waves for the nondestructive evaluation of porosity content in curved corner sections of carbon fiber reinforced plastic (CFRP) laminate structures is investigated numerically as well as experimentally. For this purpose, two-dimensional (2D) finite element simulations are carried out to clarify the wave propagation behavior and the reflection characteristics when the nonfocused or focused ultrasonic wave impinges on the corner section of unidirectional and quasi-isotropic CFRP laminates from the inner side via water. The corresponding reflection measurements are carried out for the CFRP corner specimens in the pulse-echo mode using nonfocusing, point-focusing, and line-focusing transducers. The numerical simulations and the experiments show that the use of focused ultrasonic waves is effective in obtaining clearly distinguishable surface and bottom echoes from the curved corner section of CFRP laminates. The influence of the porosity content on the reflection waveforms obtained with different types of transducers is demonstrated experimentally. The experimental results indicate that the porosity content of the CFRP corner section can be evaluated based on the amplitude ratio of the surface and bottom echoes obtained with focusing transducers, if the calibration relation is appropriately established for different ply stacking sequences.
Skip Nav Destination
Article navigation
February 2018
Research-Article
Nondestructive Evaluation of Porosity Content in the Curved Corner Section of Composite Laminates Using Focused Ultrasonic Waves
Takuma Okahara,
Takuma Okahara
Department of Aeronautics and Astronautics,
Graduate School of Engineering,
Kyoto University,
Katsura, Nishikyo-ku,
Kyoto 615-8540, Japan
Graduate School of Engineering,
Kyoto University,
Katsura, Nishikyo-ku,
Kyoto 615-8540, Japan
Search for other works by this author on:
Shiro Biwa,
Shiro Biwa
Department of Aeronautics and Astronautics,
Graduate School of Engineering,
Kyoto University,
Katsura, Nishikyo-ku,
Kyoto 615-8540, Japan
e-mail: biwa@kuaero.kyoto-u.ac.jp
Graduate School of Engineering,
Kyoto University,
Katsura, Nishikyo-ku,
Kyoto 615-8540, Japan
e-mail: biwa@kuaero.kyoto-u.ac.jp
Search for other works by this author on:
Akira Kuraishi
Akira Kuraishi
Aerospace Company,
Kawasaki Heavy Industries, Ltd.,
Kakamigahara 504-8710, Gifu, Japan
Kawasaki Heavy Industries, Ltd.,
Kakamigahara 504-8710, Gifu, Japan
Search for other works by this author on:
Takuma Okahara
Department of Aeronautics and Astronautics,
Graduate School of Engineering,
Kyoto University,
Katsura, Nishikyo-ku,
Kyoto 615-8540, Japan
Graduate School of Engineering,
Kyoto University,
Katsura, Nishikyo-ku,
Kyoto 615-8540, Japan
Shiro Biwa
Department of Aeronautics and Astronautics,
Graduate School of Engineering,
Kyoto University,
Katsura, Nishikyo-ku,
Kyoto 615-8540, Japan
e-mail: biwa@kuaero.kyoto-u.ac.jp
Graduate School of Engineering,
Kyoto University,
Katsura, Nishikyo-ku,
Kyoto 615-8540, Japan
e-mail: biwa@kuaero.kyoto-u.ac.jp
Akira Kuraishi
Aerospace Company,
Kawasaki Heavy Industries, Ltd.,
Kakamigahara 504-8710, Gifu, Japan
Kawasaki Heavy Industries, Ltd.,
Kakamigahara 504-8710, Gifu, Japan
1Corresponding author.
Manuscript received June 22, 2017; final manuscript received August 4, 2017; published online September 29, 2017. Assoc. Editor: Yuris Dzenis.
ASME J Nondestructive Evaluation. Feb 2018, 1(1): 011009-011009-6 (6 pages)
Published Online: September 29, 2017
Article history
Received:
June 22, 2017
Revised:
August 4, 2017
Citation
Okahara, T., Biwa, S., and Kuraishi, A. (September 29, 2017). "Nondestructive Evaluation of Porosity Content in the Curved Corner Section of Composite Laminates Using Focused Ultrasonic Waves." ASME. ASME J Nondestructive Evaluation. February 2018; 1(1): 011009–011009–6. https://doi.org/10.1115/1.4037546
Download citation file:
Get Email Alerts
Cited By
Finite Element Method Modeling for Extended Depth of Focus Acoustic Transducer
ASME J Nondestructive Evaluation (May 2025)
Effect of Various Notch Shapes on Lamb Wave Scattering Behavior in a Bent Plate
ASME J Nondestructive Evaluation (August 2025)
Similarity Analysis to Enhance Transfer Learning for Damage Detection
ASME J Nondestructive Evaluation (August 2025)
Long Short-Term Memory Autoencoder for Anomaly Detection in Rails Using Laser Doppler Vibrometer Measurements
ASME J Nondestructive Evaluation (August 2025)
Related Articles
Enhanced Ultrasonic Imaging and Non-Destructive Evaluation Using Angle-of-Arrival Estimation in Dimension-Reduced Beam Space
ASME J Nondestructive Evaluation (August,2020)
Dynamic Distribution of Displacement and Stress Considerations in the Ultrasonic Immersion Nondestructive Evaluation of Multilayered Plates
J. Eng. Mater. Technol (July,1990)
Ultrasonic Wave Considerations for the Development of an NDE Feature Matrix for Anisotropic Media
J. Eng. Mater. Technol (July,1989)
Preliminary Design of a High-Frequency Phased-Array Acoustic Microscope Probe for Nondestructive Evaluation of Pressure Vessel and Piping Materials
J. Pressure Vessel Technol (August,2018)
Related Proceedings Papers
Related Chapters
Development of an Acoustical Method for Measuring the Transition Layer of Surficial Marine Sediments
Contaminated Sediments: Evaluation and Remediation Techniques
Introduction and Scope
High Frequency Piezo-Composite Micromachined Ultrasound Transducer Array Technology for Biomedical Imaging
Eddy-Current Simulation in Prisms, Plates, and Shells with the Program EDDYNET
Eddy-Current Characterization of Materials and Structures