TY - JOUR
T1 - Effective conditions to detect crack wave radiating from a fluid-filled crack in a finite test piece of rock
AU - Ito, Shin
AU - Sekine, Kotaro
AU - Moriya, Hirokazu
AU - Hayashi, Kazuo
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2010/2
Y1 - 2010/2
N2 - It is examined by numerical calculation how to detect crack wave radiating from a fluid-filled crack in a finite test piece of the rock, emphasizing the application to geometrical characterization of a geothermal reservoir crack. Boundary Integral Equation Method is employed for the numerical calculation. It is revealed that resonance of the test piece and stimulation e.g., hitting by hammer to stimulate the crack, have strong effect on radiation pattern from a crack in a finite test piece. In the case of large stiffness due to contact between the asperities on the upper and lower surfaces of the crack, it is difficult to detect the crack wave. In the case of measuring crack wave on the surface of the test piece, it is better for measuring that the surface of the test piece is near the crack surface. If surface of test piece is not near the crack surface, higher modes of crack wave are veiled in resonance of the test piece and stimulation.
AB - It is examined by numerical calculation how to detect crack wave radiating from a fluid-filled crack in a finite test piece of the rock, emphasizing the application to geometrical characterization of a geothermal reservoir crack. Boundary Integral Equation Method is employed for the numerical calculation. It is revealed that resonance of the test piece and stimulation e.g., hitting by hammer to stimulate the crack, have strong effect on radiation pattern from a crack in a finite test piece. In the case of large stiffness due to contact between the asperities on the upper and lower surfaces of the crack, it is difficult to detect the crack wave. In the case of measuring crack wave on the surface of the test piece, it is better for measuring that the surface of the test piece is near the crack surface. If surface of test piece is not near the crack surface, higher modes of crack wave are veiled in resonance of the test piece and stimulation.
KW - Boundary element method
KW - Coupled problem
KW - Elastic wave
KW - Elasticity
KW - Geothermal energy
KW - Geothermal reservoir crack
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U2 - 10.1299/kikaia.76.158
DO - 10.1299/kikaia.76.158
M3 - Article
AN - SCOPUS:77952274803
SN - 0387-5008
VL - 76
SP - 158
EP - 163
JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
IS - 762
ER -