Experimental and Numerical Analysis of Mode I Fracture Process of Rock by Semi-Circular Bend Specimen

Peng Xiao, Diyuan Li, Guoyan Zhao and Meng Liu
Additional contact information
Peng Xiao: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Diyuan Li: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Guoyan Zhao: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Meng Liu: School of Resources and Safety Engineering, Central South University, Changsha 410083, China

Mathematics, 2021, vol. 9, issue 15, 1-14

Abstract: The semi-circular bend (SCB) specimen is widely used to measure fracture toughness of brittle materials such as rock. In this work, the stress field, fracture process zone (FPZ), and crack propagation velocity of SCB specimen are analyzed during the fracture process of rock specimens. The FPZ of specimen is obtained by experimental and numerical methods under a three-point bend test. The stress concentration zones of specimen present a heart shape at peak load points. FPZ forms before macro fracture occurs. The macro fracture form inside FPZ in a post-peak region of a load–displacement curve. The crack propagation process of specimen include two stages, namely the rapid crack initial development stage, and the final crack splitting stage. The maximum crack propagation velocity of specimen is about 267 m/s, and the average crack propagation velocity is about 111 m/s.

Keywords: numerical simulation; rock mechanics; mode I fracture toughness; fracture process zone; digital image correlation (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/2227-7390/9/15/1769/pdf (application/pdf)
https://www.mdpi.com/2227-7390/9/15/1769/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jmathe:v:9:y:2021:i:15:p:1769-:d:602061

Access Statistics for this article

Mathematics is currently edited by Ms. Emma He

More articles in Mathematics from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().