@article{oai:kumadai.repo.nii.ac.jp:00031145,
 author = {尾原, 祐三 and Jeong, Sang Son and Nakamura, Kimiharu and Yoshida, Shingo and Obara, Yuzo and 尾原, 祐三 and 片岡, みなみ and Kataoka, Minami},
 journal = {Procedia  Engineering},
 month = {Jun},
 note = {application/pdf, 論文(Article), The  objective  of  this  study  is  to  examineany  variationfrom  micro  to  macroscalemode-I  fracture  toughness  of  granite  usingmicro-sized  specimen  and  semi-circular  specimen.  The  rock  used  in  the  tests  is  Iksan  granite  (Korea)which  is  composed  ofminerals,  such  as  plagioclaseandalkali  feldspar,  quartz.  In  order  to  investigate  microscalefracture  toughness,  a  mechanical  testing machine was used. This machine is an original one and developedby ourselves. In the test, a micro-sized cantilever beam type  specimen  was  used.  Its  dimension  is  10  ×  10  ×  50  μm.  On  the  other  hand, in  order  toexamine  macroscalefracture toughness,  Semi-Circular Bend  (SCB)  test  is  adopted.  This  is  one  of  ISRM-suggested  methods  for  estimation  of  the  mode-I fracture toughness of rocks. Thesemi-circular specimens are preparedwith a radius of 12.5mm to 50mm. Based on the fracture toughness obtained from both tests, the size effect of granite is discussedin the range from micro to macroscale., https://www.sciencedirect.com/science/article/pii/S1877705817323822},
 pages = {761--767},
 title = {Fracture Toughness of Granite Measured Using Micro to Macro Scale Specimens},
 volume = {191},
 year = {2017},
 yomi = {オバラ, ユウゾウ and カタオカ, ミナミ}
}