000011883 001__ 11883
000011883 005__ 20141205155956.0
000011883 04107 $$aeng
000011883 046__ $$k2008-10-12
000011883 100__ $$aTian, Jiayong
000011883 24500 $$aInfluence of Stress on Elastic Wave Velocity Around a Borehole in Rocks

000011883 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011883 260__ $$b
000011883 506__ $$arestricted
000011883 520__ $$2eng$$aIn this paper, we introduce acoustoelasticity theory to investigate wave-velocity distribution and polarization around a borehole in prestressed rocks to build their direct and explicit link macroscopically. The acoustoelasticity theory based on non-linear continuum mechanics invokes third-order elastic constants to explain the stress-induced wave-velocity change of rocks. The numerical results show that directions of the maximum and minimum wave-velocity change around a borehole correspond to those of the minimum and maximum far-field principal rock stresses, respectively. In order to validate the theoretical analysis, wave velocities around a borehole in sand stone under the biaxial loading are measured by pulse-echo method. The detail discussion shows that the experimental results coincide with the theoretical results, which means that the ultrasonic method based on acoustoelasticity theory could be a promising measurement method for in-situ rock stresses.

000011883 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011883 653__ $$aAcoustoelasticity, In-situ stress, Ultrasonic waves, Rock, Wave velocity

000011883 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011883 720__ $$aTian, Jiayong$$iMan, Yuanpeng$$iXie, Zhoumin$$iQi, Hui
000011883 8560_ $$ffischerc@itam.cas.cz
000011883 8564_ $$s273154$$uhttps://invenio.itam.cas.cz/record/11883/files/04-01-0036.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 04-01-0036.
000011883 962__ $$r9324
000011883 980__ $$aPAPER