Study of Deformation Rule of Ordovician Limestone in Unloading of High Confining Compress

Yu Chun Yang; Xiang Min Cheng; Guo Bin Zhao; Zhi Yong Qu; Shu Wen Chen

doi:10.4028/www.scientific.net/AMM.488-489.333

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Study of Deformation Rule of Ordovician Limestone in Unloading of High Confining Compress
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 488-489Study of Deformation Rule of Ordovician Limestone...

Study of Deformation Rule of Ordovician Limestone in Unloading of High Confining Compress

Abstract:

Under unloading condition, the characteristics of rock are different from them under loading condition. This paper talks about the characteristics of Ordovician limestone under loading and unloading condition of high compress which were taken from North Tian Mountain. The testing results indicated that: The lateral deformation and bulk deformation of rock sample are clearly in the process of unloading. Plastic deformation is not notability in the unloading condition. After the peak value in the stress-strain curve, the stress decrease quickly, it is showed that the brittleness characteristic is the better remarkable under unloading condition than loading condition. Under unloading condition, deformation modulus E₅₀ and Possion ratio μ is quadric with the confining compress.

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Periodical:

Applied Mechanics and Materials (Volumes 488-489)

Pages:

333-336

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.488-489.333

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Online since:

January 2014

Authors:

Yu Chun Yang*, Xiang Min Cheng, Guo Bin Zhao, Zhi Yong Qu, Shu Wen Chen

Keywords:

Deformation Characteristic, Ordovician Limestone, Stress-Strain Curve, Unloading Test

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* - Corresponding Author

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