scholarly journals On a plate/surface wave mode selection criteria for ultrasonic evaluation in layered structures

1987 ◽  
Vol 82 (S1) ◽  
pp. S21-S21 ◽  
Author(s):  
A. Pilarski ◽  
J. L. Rose ◽  
K. Balasabramaniam
Keyword(s):  
Surface Wave ◽  
Selection Criteria ◽  
Mode Selection ◽  
Layered Structures ◽  
Wave Mode ◽  
Plate Surface ◽  
Ultrasonic Evaluation

scholarly journals Phase-delayed laser diode array allows ultrasonic guided wave mode selection and tuning

2013 ◽  
Vol 113 (14) ◽  
pp. 144904 ◽  
Author(s):  
Pasi Karppinen ◽  
Ari Salmi ◽  
Petro Moilanen ◽  
Timo Karppinen ◽  
Zuomin Zhao ◽  
...  
Keyword(s):  
Laser Diode ◽  
Mode Selection ◽  
Wave Mode ◽  
Guided Wave ◽  
Diode Array ◽  
Laser Diode Array ◽  
Ultrasonic Guided Wave

Improved Damage Location Accuracy Using Strain Energy-Based Mode Selection Criteria

AIAA Journal ◽  
10.2514/2.159 ◽  
1997 ◽  
Vol 35 (4) ◽  
pp. 693-699 ◽  
Author(s):  
Scott W. Doebling ◽  
Francois M. Hemez ◽  
Lee D. Peterson ◽  
Charbel Farhat
Keyword(s):  
Strain Energy ◽  
Selection Criteria ◽  
Mode Selection ◽  
Location Accuracy ◽  
Damage Location

scholarly journals Features of the Surface and Subsurface Waves Application for Ultrasonic Evaluation of Physicomechanical Properties of Solids. Part 2. Strenghtned Inhomogeneous Surface Layer

2019 ◽  
Vol 10 (1) ◽  
pp. 69-79
Author(s):  
A. R. Baev ◽  
A. L Mayorov ◽  
N. V. Levkovich ◽  
M. V. Asadchaya
Keyword(s):  
Experimental Data ◽  
Surface Layer ◽  
Spatial Distribution ◽  
Surface Wave ◽  
High Frequency ◽  
Hardened Layer ◽  
Gray Iron ◽  
Physicomechanical Properties ◽  
Inhomogeneous Surface ◽  
Ultrasonic Evaluation

The propagation of a pulsed signal of a surface wave over an object with a non-uniform surface layer, obtained, for example, as a result of surface hardening, with structural damage, is accompanied by the dispersion of the velocity of the wave carrying important information about the parameters of such a layer. The aim of the work is to study the relationship between the acoustic parameters of a pulsed acoustic signal of a surface and subsurface waves and the surface layer of steel specimens hardened by high-frequency hardening, and gray iron-chill. Features of the surface and subsurface waves application for ultrasonic evaluation of physicomechanical properties of solids. Strenghtned inhomogeneous surface layer.A brief analysis of the known works on determining the depth of hardened surface layers by various methods, including high-frequency hardening, cementation, etc., is carried out. Based on the Oulder integral expression. The dependence connecting the wave velocity, its frequency, the depth of the hardened layer and the spatial distribution of hardness represented as a step with a changing slope of its side surface simulating the transition zone of the hardened layer are calculated.Using the pulse method and low-aperture transducers with a frequency of 1−3.8 MHz, the dependences of the surface wave velocity on the cutting height of a layer hardened by HDTV hardening are obtained. A comparison of experimental data and calculations of the theoretical model showed a good qualitative correspondence between them, demonstrate a high «sensitivity» of the method in relation to the nature of the change in hardness over the depth of the hardened layer. It is shown that the proposed approach is promising for solving the inverse problem of restoring the spatial distribution of hardness based on experimental data.The goniometric method was approbated to determine the dependence between amplitude-angle characteristics and depth of the surface steel layers hardened by high-frequency hardening and depth of hardened gray iron specimens layer – with chill. It is shown that the optimal angle corresponding maximum of excited surface wave amplitude in steel specimens is decreasing up to 24–26'vs. hardened depth layer. But when the tested specimens from cast iron this angle decreasing is nearly of 6°. Recommendations on the use of research results in practice are given.

Ashing Properties in a Surface-Wave Mode Plasma with a Quartz Window

2002 ◽  
Vol 41 (Part 1, No. 3A) ◽  
pp. 1224-1229 ◽  
Author(s):  
Keisuke Shinagawa ◽  
Jin Yamamoto ◽  
Kouta Kusaba ◽  
Haruo Shindo ◽  
Masakazu Furukawa
Keyword(s):  
Surface Wave ◽  
Wave Mode ◽  
Quartz Window

Effect of wave-mode conversion device on production of large-area rectangular overdense surface-wave plasmas at the gas pressure about 100 Pa

2011 ◽  
Vol 18 (1) ◽  
pp. 013505 ◽  
Author(s):  
Zhaoquan Chen ◽  
Minghai Liu ◽  
Lingli Hong ◽  
Qiyan Zhou ◽  
Lili Cheng ◽  
...  
Keyword(s):  
Surface Wave ◽  
Mode Conversion ◽  
Wave Mode ◽  
Gas Pressure ◽  
Large Area

scholarly journals Waveform inversions and the significance of surface-wave mode coupling

1996 ◽  
Vol 124 (1) ◽  
pp. 258-278 ◽  
Author(s):  
Henk Marquering ◽  
Roel Snieder ◽  
Guust Nolet
Keyword(s):  
Surface Wave ◽  
Mode Coupling ◽  
Wave Mode
Sign in / Sign up

Export Citation Format

Share Document