Showing papers in "Ultrasonics in 2016"

TL;DR: A deep learning architecture for automated extraction of learned-from-data image features from the shear-wave elastography (SWE) that integrates feature learning with feature selection on SWE is built and may be potentially used in clinical computer-aided diagnosis of breast cancer.

TL;DR: A mechanism for how the LIPUS signal can enhance fracture repair is proposed by combining the findings of numerous studies by presenting the state of the art data related to LIP US effects and mechanism.

TL;DR: Two drilling methods for hole making of CFRP composites are compared in five aspects, including cutting force, torque, surface roughness, hole diameter, and material removal rate.

TL;DR: This paper describes a new ultrasonic array imaging method for Non-Destructive Testing (NDT) which is derived from the medical Plane Wave Imaging (PWI) technique, and is compared to the Total Focusing Method (TFM), which is the reference imaging technique in NDT.

TL;DR: CAFA predictions compared well with full scale multi-physics FEM simulations and experiments with scanning laser Doppler vibrometry (SLDV), while achieving remarkable performance in computational efficiency and computer resource saving compared with conventional FEM.

TL;DR: The present paper highlights the effect of feed rate, depth of cut, cutting velocity and percentage intensity of ultrasonic power on residual stress generation.

TL;DR: The validations performed on a carbon fiber composite laminate plate and an aircraft composite oil tank show a good impact localization accuracy of the model-independent spatial-wavenumber filter based impact imaging method.

TL;DR: The proposed EMAT requires a magnetic circuit configuration that allows omnidirectional SH wave transduction and consists of a pair of ring-type permanent magnets that supply static magnetic fluxes and a specially wound coil that induces eddy currents.

TL;DR: The results acquired by this paper are capable of providing guidance for utilizing UPV test to estimate the strength of underground CGB structures and an exponential relationship with the correlation coefficient of 0.959 appears to exist between the UCS and UPV for CGB samples.

TL;DR: Strain ratio values depend significantly on reference and target region-of-interest being above the same tissue, for instance bone, and were not influenced by depth in this study.

TL;DR: The results confirm the ability of the Compressed Sensing technique to identify the defect, while reconstructing the wavefield with good accuracy using a significantly reduced number of measurements.

TL;DR: The results show that the guided wave phased array method is a potential effective method for rapid inspection of large composite structures and provides intrinsic explanations for phased array beamforming.

TL;DR: It is confirmed that using the ACT/LDV system and implementing simple Snell's law method is highly sensitive and effective in characterizing the dispersion curves of Lamb waves in composite structures as well as its angular dependency.

TL;DR: An automated algorithm to segment 3D whole breast ultrasound volumes into functionally distinct tissues that may help to correct ultrasound speed of sound aberrations and assist in density based prognosis of breast cancer is proposed.

TL;DR: The results show that the proposed de-noising method not only has a strong de-speckling ability, but also keeps the image details, such as the edge of a lesion, in the ultrasound images.

TL;DR: Experimental results showed competitive results for both surface roughness and residual stress in UVAM when compared with conventional milling especially in the low range of frequency with similar trend for tool wear.

TL;DR: A theoretical approach is taken into consideration to investigate Love wave propagation in a transversely isotropic piezoelectric layer on a piezomagnetic half-space and the numerical results clearly show the influence of different stacking sequences on dispersion curves and on magneto-electromechanical coupling factor.

TL;DR: This work proposes a formal analytical theory using the partial-wave series expansion (PWSE) method in cylindrical coordinates, to calculate the acoustic backscattering form function as well as the radiation force-per-length on an infinitely long elliptical (non-circular) cylinder in plane progressive waves.

TL;DR: In this study, the laser induced ultrasonic wave on an aluminum plate is simulated, and a nonlinear feature is used to detect a micro crack introduced in the plate model, and the crack is successfully detected and visualized.

TL;DR: A new beamformer, which combines the eigenspace based minimum variance (ESBMV) beamformer with a subarray coherence based postfilter (SCBP) for improving the quality of ultrasound plane-wave imaging, which showed an improved imaging quality and showed advantages over the ESBMV-Wiener beamformer in preserving a less grainy speckle.

TL;DR: The results obtained show that a spatial resolution of about 2-3mm can be achieved when operating at the wavelength of about 5mm even using a stationary 3D scheme with a few fixed sources and no rotating elements.

TL;DR: The experimental and numerical results presented for selected AE signals confirm that TRM is capable of localizing AE activity in RC caused by concrete cracking and is corroborated by three-dimensional crack distributions obtained from X-ray computed tomography images.

TL;DR: Concepts of minimum resolvable distance and sensitivity maps are extended to anisotropic attenuative materials in order to provide the means for comparison of different guided wave modes in composite materials and choose the optimum operating conditions for possible NDE/SHM applications on composite materials.

TL;DR: A novel linear piezoelectric motor which is suitable for rapid ultra-precision positioning and can be quickly and accurately positioned in a large stroke is presented.

TL;DR: It is shown that the functionally graded interlayers have evident influences on the dispersion curves and the band gaps.

TL;DR: In the presented work, analytical expressions are shown for the determination of the k-ω location of the zero group velocity Lamb modes as a function of the Poisson's ratio and an inverse problem is formulated to determine the unknown wave velocities in plates of known thickness.

TL;DR: Experimental validations of a probability-based reconstruction algorithm (PRA) on ice detection of plate-like structures corroborates the fact that ultrasonic guided wave imaging technology could be a potential useful ice sensing tool in plate- like structures.

TL;DR: A multiphysics model using finite element methods was established, which verified that it can provide a convenient and accurate way to interpret the signals in air-coupled ultrasonic inspection using leaky Lamb waves.

TL;DR: Two analytical models for nonlinear imperfect interfaces can accurately predict the additional nonlinearity caused by interface imperfections based on the strength of the reflected and transmitted mixed longitudinal waves produced by them under non-collinear shear wave interrogation.

TL;DR: The results show that the application of the SVPT method combined with surfactant modification leads to an impressive twelve-fold increase in the conductivity of the PEDOT PSS thin films compared with that of the pristine non-vibrated film.