Results 11 to 20 of about 229,260 (299)

Constraints on Neutron Star Crusts From Oscillations in Giant Flares [PDF]

, 2009
We show that the fundamental seismic shear mode, observed as a quasi-periodic oscillation in giant flares emitted by highly-magnetized neutron stars, is particularly sensitive to the nuclear physics of the crust. The identification of an oscillation at ~
Andrew W. Steiner, Anna L. Watts, C. Thompson   +2 more
core   +7 more sources

A Comparative Study of Three Types Shear Mode Piezoelectric Wafers in Shear Horizontal Wave Generation and Reception

Sensors, 2018
Guided wave-based inspection has emerged as a promising tool to evaluate the reliability of key components in modern industries. The fundamental shear horizontal (SH0) wave is always of great interests for plate-like structures because of its non ...
Qiang Huan, Mingtong Chen, Faxin Li
doaj   +1 more source

Residual strain measurement based on longitudinal to shear wave velocity ratio with a dual-mode EMAT

Frontiers in Materials, 2023
In this paper, a new and noncontact method with measuring longitudinal to shear wave velocity ratio by a dual-mode electromagnetic acoustic transducer is proposed for residual strain measurement in a metal structure without knowing its thickness. Firstly,
Geng Dang, Geng Dang, Cuixiang Pei, Zhanfeng Yang, Haiqiang Zhou   +4 more
doaj   +1 more source

Ultrasonic metal sheet thickness measurement without prior wave speed calibration [PDF]

, 2013
Conventional ultrasonic mensuration of sample thickness from one side only requires the bulk wave reverberation time and a calibration speed. This speed changes with temperature, stress, and microstructure, limiting thickness measurement accuracy ...
Dixon, S., Fan, Yichao, Maisey, D., Nickolds, Piers, Petcher, P. A.   +4 more
core   +1 more source

Characterization and Design Improvement of a Thickness-Shear Lead Zirconate Titanate Transducer for Low Frequency Ultrasonic Guided Wave Applications

Sensors, 2019
Thickness-shear transducers for guided wave testing have been used in industry for over two decades and much research has been conducted to improve the resolution and sensitivity.
Marco Zennaro, Dan J. O’Boy, Premesh Shehan Lowe, Tat-Hean Gan   +3 more
doaj   +1 more source

Experimental investigations of the influence of material and thickness on fracture under pure mode II loading

EPJ Web of Conferences, 2010
Experimental investigation to the effects of thickness and material on mode II fracture were performed. Tension-shear specimens made of aluminium alloy LC4CS and 7050-T7452 with thicknesses of 2, 4, 8 and 14 mm were used. All crack tip appearances and
Dong H.
doaj   +1 more source

Shear wave generation using a spiral electromagnetic acoustic transducer [PDF]

, 2006
A spiral electromagnetic acoustic transducer (EMAT) is efficient in eddy current generation and has been used for surface defect inspection using Rayleigh waves or thickness gauging based on plane waves in echo mode.
Baillie, Iain, Dixon, S., Edwards, R. S. (Rachel S.), Fan, Yichao, Jian, Xiaoming, Morrison, J.   +5 more
core   +1 more source

Experiments of opening and cavity shear flow-induced vibration and structural coupling resonance

Zhongguo Jianchuan Yanjiu, 2017
In order to discuss opening and cavity shear flow-induced vibration and structural coupling resonance, experiments of opening and cavity shear flow-induced vibration and structural noise control are carried out.
XIONG Jishi, LV Shijin, QIU Changlin, WANG Chunxu, CHEN Zhigang   +4 more
doaj   +1 more source

Velocity profiles in shear-banding wormlike micelles [PDF]

, 2002
Using Dynamic Light Scattering in heterodyne mode, we measure velocity profiles in a much studied system of wormlike micelles (CPCl/NaSal) known to exhibit both shear-banding and stress plateau behavior.
Annie Colin, D. Roux, F. Molino, François Molino, H. Rehage, J.-B. Salmon, J.-F. Berret, Jean-Baptiste Salmon, M. E. Cates, M. E. Cates, P. D. Olmsted, R. G. Larson, R. W. Mair, Sébastien Manneville, V. Schmitt   +14 more
core   +2 more sources

Effects of the adjustable ring-mode laser on intermetallic formation and mechanical properties of steel to aluminium laser welded lap joints

Materials & Design, 2023
Research has confirmed a positive effect of laser beam shaping on controlling weld profiles and keyhole stabilisation, with significant reductions of porosity in weldments.
S. Jabar, A. Baghbani Barenji, P. Franciosa, H.R. Kotadia, D. Ceglarek   +4 more
doaj   +1 more source