Stress-induced crack path in Aji granite under tensile stress

Kudo, Yozo; Sano, Osam; Murashige, Naokuni; Mizuta, Yoshiaki; Nakagawa, Koji

doi:10.1007/bf00876342

Cited by 35 publications

(21 citation statements)

References 16 publications

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“…10). Previous studies did not observe planer crack paths for subcritical crack growth in rocks (Meredith and Atkinson, 1983;Swanson, 1985Swanson, , 1987Kudo et al, 1992;Nara and Kaneko, 2005;Nara et al, , 2011. In this study, a rectangular guide groove is put on the specimen (Fig.…”

Section: Discussionmentioning

confidence: 98%

Influence of surrounding environment on subcritical crack growth in marble

et al. 2017

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a b s t r a c tUnderstanding 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.

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Section: Discussionmentioning

confidence: 98%

Influence of surrounding environment on subcritical crack growth in marble

et al. 2017

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“…Microcracking patterns and the distribution of intergranular and intragranular microcracks on granites have been studied before (Kudo et al, 1992;Nasseri et al, 2005;Takemura et al, 2003;Vázquez et al, 2010) and after they were affected by fires (Gómez-Heras et al, 2006b;Nasseri et al, 2007). Mineralogy is known to play an important role in granite thermal degradation.…”

Section: Introductionmentioning

confidence: 98%

Influence of mineralogy on granite decay induced by temperature increase: Experimental observations and stress simulation

Vázquez

Shushakova

Gómez-Heras

2015

Engineering Geology

123

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“…doi:10.1016/j.ijsolstr.2010.12.019 front, and that the crack path tended to be smoother when the crack propagated parallel to Rift plane. Kudo et al (1992) observed crack paths in granite and investigated the interaction between the crack paths and mineral grains. According to Kudo et al (1992), the quartz grains played an important role as an obstacle; plagioclase could change the direction of the crack paths because of its cleavage plane; no definite tendency associated with the cleavage planes and pre-existing microcracks was found for potash feldspar; and biotite grains had a significant effect on the crack paths even when its constitutive ratio was very small.…”

Section: Introductionmentioning

confidence: 99%

Effects of humidity and temperature on subcritical crack growth in sandstone

Nara

Morimoto

Yoneda

et al. 2011

International Journal of Solids and Structures

108

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In order to ensure long-term stability of structures in a rock mass, the study of time-dependent fracturing is essential. The influences of the surrounding environmental conditions and rock fabric on subcritical crack growth in sedimentary rocks in air are yet to be clarified, while the nature of subcritical crack growth in igneous rocks has been studied well. In this study, the influences of temperature and relative humidity on subcritical crack growth in Berea sandstone, Shirahama sandstone and Kushiro sandstone were investigated in air. The load relaxation method of Double Torsion (DT) testing method was used to measure both crack velocity and stress intensity factor under a controlled temperature and relative humidity. Results show that the change of the crack velocity at a given stress intensity factor was unclear when the temperature increased under a constant relative humidity in air. On the other hand, we show that the crack velocity increased by several orders of magnitude when the relative humidity increased threefold or fourfold under a constant temperature at a given stress intensity factor. This increase is much larger than that expected from the conventional concept based on the theory of stress corrosion. It is therefore necessary to consider the additional mechanisms for subcritical crack growth in sandstone. The increase of the crack velocity was larger for sandstone which contained larger amount of clays. We conclude that subcritical crack growth in sandstone in air is affected remarkably by the relative humidity and the amount of clays in rock

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Stress-induced crack path in Aji granite under tensile stress

Cited by 35 publications

References 16 publications

Influence of surrounding environment on subcritical crack growth in marble

Influence of surrounding environment on subcritical crack growth in marble

Influence of mineralogy on granite decay induced by temperature increase: Experimental observations and stress simulation

Effects of humidity and temperature on subcritical crack growth in sandstone

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