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

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

Abstract

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.

Original languageEnglish
Title of host publication27th Annual International Pittsburgh Coal Conference 2010, PCC 2010
Pages431-437
Number of pages7
Publication statusPublished - 2010 Dec 1
Event27th Annual International Pittsburgh Coal Conference 2010, PCC 2010 - Istanbul, Turkey
Duration: 2010 Oct 11 → …

Publication series

Name27th Annual International Pittsburgh Coal Conference 2010, PCC 2010
Volume1

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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