Loading rate dependency of dynamic fracture toughness of rocks

Sang Ho Cho, Min Seong Kim, Hyeong Min Kang, Minami Kataoka, Yuzo Obara, Kwangmin Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In this study, straight notched disk bending (SNDB) specimens of Yeongju granite were used to determine the fracture toughness with wide range of loading velocity from 0.01 to 680, 000 mm/mm. The SNDB specimens were dynamically loaded with the split Hopkinson pressure bar (SHPB) system. Static fracture toughness values of the granites were also determined to compare with the dynamic fracture toughness. The measured fracture toughnesses K1c under the static and dynamic loading condition were plotted against the loading rate v on a logarithmic graph. The crack opening behavior around the tip of the notch during dynamic loading was observed by using a high speed digital camera. The fracture planes around the notch tip inside the tested samples were observed by a high-resolution microfocus X-ray CT scanner.

Original languageEnglish (US)
Title of host publication49th US Rock Mechanics / Geomechanics Symposium 2015
PublisherAmerican Rock Mechanics Association (ARMA)
Pages2856-2860
Number of pages5
Volume4
ISBN (Print)9781510810518
StatePublished - 2015
Event49th US Rock Mechanics / Geomechanics Symposium - San Francisco, United States
Duration: Jun 29 2015Jul 1 2015

Other

Other49th US Rock Mechanics / Geomechanics Symposium
CountryUnited States
CitySan Francisco
Period6/29/157/1/15

Fingerprint

loading rate
fracture toughness
fracture strength
Fracture toughness
Rocks
rocks
notches
rock
high speed cameras
digital cameras
High speed cameras
Digital cameras
granite
scanner
scanners
crack
cracks
Cracks
X rays
high resolution

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Cho, S. H., Kim, M. S., Kang, H. M., Kataoka, M., Obara, Y., & Kim, K. (2015). Loading rate dependency of dynamic fracture toughness of rocks. In 49th US Rock Mechanics / Geomechanics Symposium 2015 (Vol. 4, pp. 2856-2860). American Rock Mechanics Association (ARMA).

Loading rate dependency of dynamic fracture toughness of rocks. / Cho, Sang Ho; Kim, Min Seong; Kang, Hyeong Min; Kataoka, Minami; Obara, Yuzo; Kim, Kwangmin.

49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 4 American Rock Mechanics Association (ARMA), 2015. p. 2856-2860.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Cho, SH, Kim, MS, Kang, HM, Kataoka, M, Obara, Y & Kim, K 2015, Loading rate dependency of dynamic fracture toughness of rocks. in 49th US Rock Mechanics / Geomechanics Symposium 2015. vol. 4, American Rock Mechanics Association (ARMA), pp. 2856-2860, 49th US Rock Mechanics / Geomechanics Symposium, San Francisco, United States, 6/29/15.
Cho SH, Kim MS, Kang HM, Kataoka M, Obara Y, Kim K. Loading rate dependency of dynamic fracture toughness of rocks. In 49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 4. American Rock Mechanics Association (ARMA). 2015. p. 2856-2860
Cho, Sang Ho ; Kim, Min Seong ; Kang, Hyeong Min ; Kataoka, Minami ; Obara, Yuzo ; Kim, Kwangmin. / Loading rate dependency of dynamic fracture toughness of rocks. 49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 4 American Rock Mechanics Association (ARMA), 2015. pp. 2856-2860
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