Article(id=1223196809577747105, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223196803663778281, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20221851, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1662307200000, receivedDateStr=2022-09-05, revisedDate=1666108800000, revisedDateStr=2022-10-19, acceptedDate=null, acceptedDateStr=null, onlineDate=1769562445300, onlineDateStr=2026-01-28, pubDate=1692892800000, pubDateStr=2023-08-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769562445300, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769562445300, creator=13701087609, updateTime=1769562445300, updator=13701087609, issue=Issue{id=1223196803663778281, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='8', pageStart='1', pageEnd='222', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769562443888, creator=13701087609, updateTime=1769563793740, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223202465391166440, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223196803663778281, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223202465391166441, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223196803663778281, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=166, endPage=169, ext={EN=ArticleExt(id=1223196811691676409, articleId=1223196809577747105, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Analysis of Microcrack Initiation, Propagation and Damage Evolution in Fractured Rock, columnId=1222925283779400191, journalTitle=Water Resources and Power, columnName=WATER CONSERVANCY AND HYDROPOWER ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

In order to explore the microcrack initiation, propagation and damage evolution of rock samples with different crack types (opening and closed), inclination and crack length, based on PFC2D, the fractured rock sample model was constructed and the uniaxial compression numerical tests were carried out. The initial crack and failure characteristics of rock sample under different crack obliquity and type were explained from the perspective of mesoscopics. The damage analysis of rock samples was carried out from the perspective of energy. The results are as follows. With the increase of crack inclination angle, the peak strength of the open type is positively correlated, while that of the closed type decreases first and then increases. The elastic modulus is consistent with the change of peak strength. When 30°≤α≤60°, the microcrack initiation characteristics of the two kinds of fractured rock samples are consistent. When 60°≤α≤90°, the failure paths of the two rock samples are similar. The damage variable and correction coefficient were defined based on the energy of cementation failure, and the evolution model was established. The rationality of the model was verified from the perspectives of fracture type, inclination angle and length. The research results can provide a theoretical basis for further understanding the damage evolution process of fractured rock mass after loading.

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为探究含有不同裂隙类型(张开、闭合)、裂隙倾角和裂隙长度岩样的微裂纹起裂扩展及损伤演化规律,基于PFC2D构建了含裂隙岩样模型并进行单轴压缩数值试验,从细观角度解释了不同裂隙倾角和裂隙类型岩样的起裂及破坏特征差异,并从能量角度对岩样进行损伤分析。结果表明,随着裂隙倾角α的增大,张开型峰值强度呈正相关,闭合型则先减小后增大,弹性模量与峰值强度变化规律一致。当30°≤α≤60°时,两种含裂隙岩样多从裂隙尖端起裂;当60°≤α≤90°时,两种岩样破坏路径相似;基于胶结破坏能定义损伤变量和修正系数,建立了演化模型,分别从裂隙类型、倾角和长度三个角度验证了模型的合理性。研究结果可为进一步了解含裂隙岩体受载后的损伤演化过程提供理论基础。

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俞然刚(1967-),男,博士、教授、博导,研究方向为建筑物检测、鉴定与加固,水泥、混凝土性能及外加剂,岩土及岩石力学等,E-mail:
, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=b7r9o+5lPbFrPsE33M1FZw==, magXml=z5U9kU3l8HKJPZgAnzw1dQ==, pdfUrl=null, pdf=4NK6H3z3hhiM0T2RjWLPrg==, pdfFileSize=3486938, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=PArVpd0lrFwW4fqZJGVkzQ==, mapNumber=null, authorCompany=null, fund=null, authors=

李传龙(1997-),男,硕士研究生,研究方向为隧道围岩稳定性,E-mail:

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李传龙(1997-),男,硕士研究生,研究方向为隧道围岩稳定性,E-mail:

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李传龙(1997-),男,硕士研究生,研究方向为隧道围岩稳定性,E-mail:

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含裂隙岩石微裂纹起裂扩展及损伤演化分析
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李传龙 , 俞然刚 , 马国良 , 杨文东 , 宋若松 , 张立松
水电能源科学 | 水利水电工程 2023,41(8): 166-169
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水电能源科学 | 水利水电工程 2023, 41(8): 166-169
含裂隙岩石微裂纹起裂扩展及损伤演化分析
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李传龙 , 俞然刚 , 马国良, 杨文东, 宋若松, 张立松
作者信息
  • 中国石油大学(华东)储运与建筑工程学院,山东 青岛 266580
  • 李传龙(1997-),男,硕士研究生,研究方向为隧道围岩稳定性,E-mail:

通讯作者:

俞然刚(1967-),男,博士、教授、博导,研究方向为建筑物检测、鉴定与加固,水泥、混凝土性能及外加剂,岩土及岩石力学等,E-mail:
Analysis of Microcrack Initiation, Propagation and Damage Evolution in Fractured Rock
Chuan-long LI , Ran-gang YU , Guo-liang MA, Wen-dong YANG, Ruo-song SONG, Li-song ZHANG
Affiliations
  • College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China
出版时间: 2023-08-25 doi: 10.20040/j.cnki.1000-7709.2023.20221851
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为探究含有不同裂隙类型(张开、闭合)、裂隙倾角和裂隙长度岩样的微裂纹起裂扩展及损伤演化规律,基于PFC2D构建了含裂隙岩样模型并进行单轴压缩数值试验,从细观角度解释了不同裂隙倾角和裂隙类型岩样的起裂及破坏特征差异,并从能量角度对岩样进行损伤分析。结果表明,随着裂隙倾角α的增大,张开型峰值强度呈正相关,闭合型则先减小后增大,弹性模量与峰值强度变化规律一致。当30°≤α≤60°时,两种含裂隙岩样多从裂隙尖端起裂;当60°≤α≤90°时,两种岩样破坏路径相似;基于胶结破坏能定义损伤变量和修正系数,建立了演化模型,分别从裂隙类型、倾角和长度三个角度验证了模型的合理性。研究结果可为进一步了解含裂隙岩体受载后的损伤演化过程提供理论基础。

裂隙岩石  /  裂隙倾角  /  裂纹起裂机理  /  颗粒位移矢量场  /  损伤演化

In order to explore the microcrack initiation, propagation and damage evolution of rock samples with different crack types (opening and closed), inclination and crack length, based on PFC2D, the fractured rock sample model was constructed and the uniaxial compression numerical tests were carried out. The initial crack and failure characteristics of rock sample under different crack obliquity and type were explained from the perspective of mesoscopics. The damage analysis of rock samples was carried out from the perspective of energy. The results are as follows. With the increase of crack inclination angle, the peak strength of the open type is positively correlated, while that of the closed type decreases first and then increases. The elastic modulus is consistent with the change of peak strength. When 30°≤α≤60°, the microcrack initiation characteristics of the two kinds of fractured rock samples are consistent. When 60°≤α≤90°, the failure paths of the two rock samples are similar. The damage variable and correction coefficient were defined based on the energy of cementation failure, and the evolution model was established. The rationality of the model was verified from the perspectives of fracture type, inclination angle and length. The research results can provide a theoretical basis for further understanding the damage evolution process of fractured rock mass after loading.

fractured rock  /  crack angle  /  crack initiation mechanism  /  particle displacement vector field  /  damage evolution
李传龙, 俞然刚, 马国良, 杨文东, 宋若松, 张立松. 含裂隙岩石微裂纹起裂扩展及损伤演化分析. 水电能源科学, 2023 , 41 (8) : 166 -169 . DOI: 10.20040/j.cnki.1000-7709.2023.20221851
Chuan-long LI, Ran-gang YU, Guo-liang MA, Wen-dong YANG, Ruo-song SONG, Li-song ZHANG. Analysis of Microcrack Initiation, Propagation and Damage Evolution in Fractured Rock[J]. Water Resources and Power, 2023 , 41 (8) : 166 -169 . DOI: 10.20040/j.cnki.1000-7709.2023.20221851
  • 国家自然科学基金项目(51979281)
2023年第41卷第8期
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doi: 10.20040/j.cnki.1000-7709.2023.20221851
  • 接收时间:2022-09-05
  • 首发时间:2026-01-28
  • 出版时间:2023-08-25
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  • 收稿日期:2022-09-05
  • 修回日期:2022-10-19
基金
国家自然科学基金项目(51979281)
作者信息
    中国石油大学(华东)储运与建筑工程学院,山东 青岛 266580

通讯作者:

俞然刚(1967-),男,博士、教授、博导,研究方向为建筑物检测、鉴定与加固,水泥、混凝土性能及外加剂,岩土及岩石力学等,E-mail:
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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