Analysis of the effect of internal defect on coke fracture behavior by rigid bodies-spring model

Kenichi Hiraki, Hideyuki Hayashizaki, Yoshiaki Yamazaki, Tetsuya Kanai, Xiaoqing Zhang, Masakazu Shoji, Hideyuki Aoki, Takatoshi Miura

研究成果: Conference contribution

抄録

In this study, to investigate the effect of internal defect in coke, fracture analyses using RBSM (Rigid Bodies-Spring Model) which is applied to fracture analysis of brittle materials such as concrete are carried out for coke. First, in case of taking no account of internal defect, the fracture analyses with RBSM assuming 4-point bending tests are carried out. As a result, analytical results reproduce the fracture behavior well. Next, it is known that internal defect such as non-adhesion region boundaries in coke influences coke strength, so in case of taking account of non-adhesion region boundaries, the fracture analyses with RBSM assuming 4-point bending tests are carried out. To investigate the location of non-adhesion region boundaries in coke, 3 percent non-adhesion region boundaries are randomly located in the coke and fracture analysis of two cases are carried out. Analytical results show that fracture load decreases when non-adhesion boundaries are located under region of high stress and microcracks happen at around non-adhesion region boundaries. It is supposed that these microcracks cause surface breakage. Analytical results also show that the fracture starts at non-adhesion region boundaries when non-adhesion region boundaries are located under region of high stress. In particular, fracture progresses at the location of continuous non-adhesion region boundaries. To investigate the fraction of non-adhesion region boundaries in coke, 3, 5 and 10 percent non-adhesion region boundaries are randomly located in coke. As a result, fracture loads decrease with an increase of non-adhesion region boundaries in the coke.

本文言語English
ホスト出版物のタイトル27th Annual International Pittsburgh Coal Conference 2010, PCC 2010
ページ431-437
ページ数7
出版ステータスPublished - 2010 12 1
イベント27th Annual International Pittsburgh Coal Conference 2010, PCC 2010 - Istanbul, Turkey
継続期間: 2010 10 11 → …

出版物シリーズ

名前27th Annual International Pittsburgh Coal Conference 2010, PCC 2010
1

Other

Other27th Annual International Pittsburgh Coal Conference 2010, PCC 2010
CountryTurkey
CityIstanbul
Period10/10/11 → …

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

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