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Title: Influence of surrounding environment on subcritical crack growth in marble
Authors: Nara, Yoshitaka  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-5717-1420 (unconfirmed)
Kashiwaya, Koki  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-7206-8889 (unconfirmed)
Nishida, Yuki
Ii, Toshinori
Author's alias: 奈良, 禎太
Keywords: Subcritical crack growth
Marble
Relative humidity
Temperature
Water
Porosity
Issue Date: 5-Jun-2017
Publisher: Elsevier BV
Journal title: Tectonophysics
Volume: 706-707
Start page: 116
End page: 128
Abstract: Understanding subcritical crack growth in rock is essential for determining appropriate measures to ensure the long-term integrity of rock masses surrounding structures and for construction from rock material. In this study, subcritical crack growth in marble was investigated experimentally, focusing on the influence of the surrounding environment on the relationship between the crack velocity and stress intensity factor. The crack velocity increased with increasing temperature and/or relative humidity. In all cases, the crack velocity increased with increasing stress intensity factor. However, for Carrara marble (CM) in air, we observed a region in which the crack velocity still increased with temperature, but the increase in the crack velocity with increasing stress intensity factor was not significant. This is similar to Region II of subcritical crack growth observed in glass in air. Region II in glass is controlled by mass transport to the crack tip. In the case of rock, the transport of water to the crack tip is important. In general, Region II is not observed for subcritical crack growth in rock materials, because rocks contain water. Because the porosity of CM is very low, the amount of water contained in the marble is also very small. Therefore, our results imply that we observed Region II in CM. Because the crack velocity increased in both water and air with increasing temperature and humidity, we concluded that dry conditions at low temperature are desirable for the long-term integrity of a carbonate rock mass. Additionally, mass transport to the crack tip is an important process for subcritical crack growth in rock with low porosity.
Rights: © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
The full-text file will be made open to the public on 5 June 2019 in accordance with publisher's 'Terms and Conditions for Self-Archiving'
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/224815
DOI(Published Version): 10.1016/j.tecto.2017.04.008
Appears in Collections:Journal Articles

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