New method for determining the Mode-I fracture toughness of shotcrete: edge notched partial disc test
Research output: Contribution to journal › Article › Research › peer-review
Standard
In: Magazine of concrete research, Vol. 76.2024, No. 11, 19.02.2024, p. 557-573.
Research output: Contribution to journal › Article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS (suitable for import to EndNote) - Download
TY - JOUR
T1 - New method for determining the Mode-I fracture toughness of shotcrete: edge notched partial disc test
AU - Manesh, Mohammad Omidi
AU - Sarfarazi, Vahab
AU - Babanouri, Nima
AU - Rezaei, Amir
AU - Moayedi Far, Arsham
N1 - Publisher Copyright: © 2023 ICE Publishing. All rights reserved.
PY - 2024/2/19
Y1 - 2024/2/19
N2 - The fracture toughness (mode I) of shotcrete specimens was obtained using edge-notched partial disc (ENPD) specimens. Notched Brazilian discs (NBDs) were also tested to validate the results of the ENPD experiments. Numerical analysis was also conducted on the ENPD results to compare the measured and numerically obtained fracture toughness values. The notch lengths in the ENPD specimens were 15, 30, 45 and 60 mm, while the notch lengths in the NBD specimens were 10, 20, 30, 40, 50 and 60 mm. It was found that the flat joint model accurately predicted the potential crack growth path and crack initiation stress as compared with the experimental results. It was also deduced that the fracture toughness was roughly the same with an increase in the notch length. The tensile strength (σ t) and fracture toughness (K IC) of the shotcrete specimens were found to be meaningfully correlated (σ t = 7.92K IC). The ENPD tests yielded the lowest fracture toughness values because of the pure tensile stress distribution on the failure surface. It was also found that the derived fracture extension patterns from the laboratory investigations were in acceptable agreement with the outputs of numerical simulations.
AB - The fracture toughness (mode I) of shotcrete specimens was obtained using edge-notched partial disc (ENPD) specimens. Notched Brazilian discs (NBDs) were also tested to validate the results of the ENPD experiments. Numerical analysis was also conducted on the ENPD results to compare the measured and numerically obtained fracture toughness values. The notch lengths in the ENPD specimens were 15, 30, 45 and 60 mm, while the notch lengths in the NBD specimens were 10, 20, 30, 40, 50 and 60 mm. It was found that the flat joint model accurately predicted the potential crack growth path and crack initiation stress as compared with the experimental results. It was also deduced that the fracture toughness was roughly the same with an increase in the notch length. The tensile strength (σ t) and fracture toughness (K IC) of the shotcrete specimens were found to be meaningfully correlated (σ t = 7.92K IC). The ENPD tests yielded the lowest fracture toughness values because of the pure tensile stress distribution on the failure surface. It was also found that the derived fracture extension patterns from the laboratory investigations were in acceptable agreement with the outputs of numerical simulations.
KW - Mining & environmental issues
KW - Numerical modeling
KW - Toughness
KW - numerical modelling
KW - mining & environmental issues
KW - toughness
UR - http://www.scopus.com/inward/record.url?scp=85180977752&partnerID=8YFLogxK
U2 - 10.1680/jmacr.23.00004
DO - 10.1680/jmacr.23.00004
M3 - Article
VL - 76.2024
SP - 557
EP - 573
JO - Magazine of concrete research
JF - Magazine of concrete research
SN - 0024-9831
IS - 11
ER -
