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© 2019. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Under high in-situ stress, crack propagation, and coalescence in fractured rock mass could result in local damage or even failure, which could eventually threaten the stability and safety of rock engineering projects [1,2,3,4,5]. [...]a thorough understanding of cracking propagation emanating from existing flaws in fractured rock mass can benefit geotechnical engineering design and implementation, and relevant research has had widespread attention. According to the characteristics of cement mortar material, the parameters obtained by numerical simulation are consistent with the physical experimental parameters of the complete standard specimen by adjusting the mesoscopic parameters. The specific parameters are listed in Table 2. Since cement mortar is a brittle material inducing complex crack types under compressive loads, so it is essential to control the type of micro-crack by continuously adjusting the values of σc¯/τc¯ , to make sure that the failure modes of the specimens obtained by numerical simulation are in a good agreement with the laboratory test results. The average strain rate tensor caused by crack propagation is equal to the sum of the moment tensors in a unit area. [...]we define the variable R based on the strain rate tensor to analyze the crack initiation mechanism and judge the crack types.

Details

Title
Experimental and DEM Analysis on Secondary Crack Types of Rock-Like Material Containing Multiple Flaws Under Uniaxial Compression
Author
Li, Yong; Cai, Weibing; Li, Xiaojing; Zhu, Weishen; Zhang, Qiangyong; Wang, Shugang
Publication year
2019
Publication date
Jan 2019
Publisher
MDPI AG
e-ISSN
20763417
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2321885299
Copyright
© 2019. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.