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Experimental Study of Macroscopic Tensile Fracture Properties of Brittle Rock at High Temperature

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Abstract:

The Mode I fracture toughness (KIC) and the Crack Tip Opening Displacement(CTOD) of rock at high temperature are measured by three-point bending test. The KIC is increased with the increase of temperature and decreased when the temperature reached its critical value (200°C). The internal structure of rock be changed as the temperature increasing and the other mechanical properties of rock, such as tensile strength, compressive strength, elastic modulus, etc. also show the same law with the KIC which lead the tensile stress hard to reach its critical value. The CTOD increases with the increasing of temperature until the load reach the peak load and the specimens at different temperatures have the same rule.

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Periodical:

Advanced Materials Research (Volumes 524-527)

Pages:

575-578

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.524-527.575

Citation:

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Online since:

May 2012

Authors:

Zhi Wang, Qiu Hua Rao

Keywords:

Fracture Energy, Fracture Toughness, High-Temperature, Macroscopic Fracture Properties, Rock

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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