File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Numerical Study on Coalescence of Pre-Existing Flaw Pairs in Rock-Like Material

TitleNumerical Study on Coalescence of Pre-Existing Flaw Pairs in Rock-Like Material
Authors
KeywordsNumerical
Pre-existing flaw
Possible tensile crack paths
Possible shear crack paths
Ligament length
Flaw tip
Coalescence pattern
AUTODYN
Issue Date2014
Citation
Rock Mechanics and Rock Engineering, 2014, v. 47, n. 6, p. 2087-2105 How to Cite?
Abstract© 2014, Springer-Verlag Wien. The present numerical study, which is an extension of our previous numerical analysis on cracking processes of a single pre-existing flaw, focuses on the coalescence of two pre-existing parallel open flaws in rock subjected to a uniaxial compressive loading. To facilitate a systematic investigation, the arrangements of the flaw pair are classified into 11 categories. Simulations engaging AUTODYN are conducted on each category. The numerical results are compared with some published physical experimental test results. Eleven typical coalescence patterns are obtained, which are in good agreement with the experimental results, which include two coalescence patterns obtained in flaw pair arrangements (II) and (VIII″) not being reported in previous studies. The information gathered in the simulations helps identify the type (tensile/shear) of each crack segment involved in the coalescence. Most of the coalescence cracks initiate at or around the flaw tips, except those in flaw pair arrangements (II) and (IX′) with a very short ligament length, in which the coalescence cracks initiate on the flaw surfaces away from the flaw tip regions. Based on the numerical simulation results, the properties of the 11 coalescence patterns are obtained. Except those in flaw pair arrangements (II) and (IX′), the other coalescence patterns can be interpreted with respect to the basic crack types—tensile wing crack, horsetail crack and anti-wing crack. In addition, based on the type of crack segments involved in coalescence, namely tensile and shear, the coalescence can be classified into T mode (tensile mode), S mode (shear mode) and TS mode (mixed tensile–shear mode).
Persistent Identifierhttp://hdl.handle.net/10722/214056
ISSN
2015 Impact Factor: 2.386
2015 SCImago Journal Rankings: 1.939

 

DC FieldValueLanguage
dc.contributor.authorLi, Huan Qiang-
dc.contributor.authorWong, Louis Ngai Yuen-
dc.date.accessioned2015-08-19T13:41:41Z-
dc.date.available2015-08-19T13:41:41Z-
dc.date.issued2014-
dc.identifier.citationRock Mechanics and Rock Engineering, 2014, v. 47, n. 6, p. 2087-2105-
dc.identifier.issn0723-2632-
dc.identifier.urihttp://hdl.handle.net/10722/214056-
dc.description.abstract© 2014, Springer-Verlag Wien. The present numerical study, which is an extension of our previous numerical analysis on cracking processes of a single pre-existing flaw, focuses on the coalescence of two pre-existing parallel open flaws in rock subjected to a uniaxial compressive loading. To facilitate a systematic investigation, the arrangements of the flaw pair are classified into 11 categories. Simulations engaging AUTODYN are conducted on each category. The numerical results are compared with some published physical experimental test results. Eleven typical coalescence patterns are obtained, which are in good agreement with the experimental results, which include two coalescence patterns obtained in flaw pair arrangements (II) and (VIII″) not being reported in previous studies. The information gathered in the simulations helps identify the type (tensile/shear) of each crack segment involved in the coalescence. Most of the coalescence cracks initiate at or around the flaw tips, except those in flaw pair arrangements (II) and (IX′) with a very short ligament length, in which the coalescence cracks initiate on the flaw surfaces away from the flaw tip regions. Based on the numerical simulation results, the properties of the 11 coalescence patterns are obtained. Except those in flaw pair arrangements (II) and (IX′), the other coalescence patterns can be interpreted with respect to the basic crack types—tensile wing crack, horsetail crack and anti-wing crack. In addition, based on the type of crack segments involved in coalescence, namely tensile and shear, the coalescence can be classified into T mode (tensile mode), S mode (shear mode) and TS mode (mixed tensile–shear mode).-
dc.languageeng-
dc.relation.ispartofRock Mechanics and Rock Engineering-
dc.subjectNumerical-
dc.subjectPre-existing flaw-
dc.subjectPossible tensile crack paths-
dc.subjectPossible shear crack paths-
dc.subjectLigament length-
dc.subjectFlaw tip-
dc.subjectCoalescence pattern-
dc.subjectAUTODYN-
dc.titleNumerical Study on Coalescence of Pre-Existing Flaw Pairs in Rock-Like Material-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00603-013-0504-6-
dc.identifier.scopuseid_2-s2.0-84920705951-
dc.identifier.hkuros259197-
dc.identifier.volume47-
dc.identifier.issue6-
dc.identifier.spage2087-
dc.identifier.epage2105-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats