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Device and method for measuring I-type creep fracture toughness and fracture toughness of rock

A creep fracture and fracture toughness technology, applied in the field of rock performance test research, to achieve the effect of simplifying test operation, ensuring accuracy and high precision

Inactive Publication Date: 2010-05-19
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
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Problems solved by technology

[0003] The present invention aims at the problem of large discreteness in existing rock testing technology, and proposes a device and method for testing rock I-type creep fracture toughness and fracture toughness, which can be tested under uniaxial tensile test conditions. Test rock I-mode creep fracture toughness and rock I-mode fracture toughness, serve for rock mechanics research and rock engineering design and construction

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  • Device and method for measuring I-type creep fracture toughness and fracture toughness of rock
  • Device and method for measuring I-type creep fracture toughness and fracture toughness of rock
  • Device and method for measuring I-type creep fracture toughness and fracture toughness of rock

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Embodiment Construction

[0019] Such as figure 1 The shown device for testing the rock type I creep fracture toughness and fracture toughness consists of an upper top cover 1, a lower top cover 2, an outer sleeve 3, an inner sleeve 4, a pull pad 5, a connecting bolt 6, and a connecting ring 7 , hanger block 8, lower bottom cover 9, finale 10 constitute, upper top cover 1 and lower bottom cover 9 sections are a circular top cover, and upper top cover 1 is as figure 2 The shape shown is a groove shape, which together with the outer sleeve 3 forms a fully enclosed cylindrical structure. Lower top cover 9 such as image 3 Shown is a round convex cap with bolt holes arranged evenly around the circumference. Both the outer sleeve 3 and the inner sleeve 4 have a circular cross-section, which is a hollow cylinder shape, and connecting holes are left in the upper and lower cross-sections respectively. Arrange the connecting bolt holes, connect the connecting ring with the bolt 6, and form an integral struc...

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Abstract

The invention relates to a device and a method for measuring the I-type creep fracture toughness and the fracture toughness of rock. A rock single axle tensile creep fracture test and a conventional fracture test are carried out on the device for measuring the I-type creep fracture toughness and the fracture toughness of rock, thus the I-type creep fracture toughness and the fracture toughness of rock are measured. The measuring method comprises the steps of: transferring a pressure applied by the exterior into a tensile force of the interior of a rock test piece so as to realize the single axle tension of the rock test piece. The invention enables the operation of the indoor measuring method of rock fracture toughness to be simpler, guarantees the accuracy of the measured data of the test and has rather high precision, therefore having excellent using and popularizing values.

Description

technical field [0001] The invention relates to the technical field of rock performance test research, in particular to a device and method for testing rock I-mode creep fracture toughness and fracture toughness. Background technique [0002] The traditional methods for testing rock I-mode fracture toughness include torsion test, three-point bending test and ring test. The rock fracture toughness measured by these traditional rock mechanics test methods often has large errors and considerable dispersion. Therefore, it is difficult to obtain the ideal rock mode I fracture toughness value. In addition, although rock creep fracture toughness is an important index reflecting rock engineering properties, no one has tested rock creep fracture toughness so far. Contents of the invention [0003] The present invention aims at the problem of large discreteness in existing rock testing technology, and proposes a device and method for testing rock I-type creep fracture toughness and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N3/28
Inventor 陈有亮邵伟周有成蒋立浩刘明亮尹珍珍王鹏
Owner UNIV OF SHANGHAI FOR SCI & TECH
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