Article(id=1274300257559176176, tenantId=1146029695717560320, journalId=1272208980697911299, issueId=1274300092707266809, articleNumber=null, orderNo=null, doi=10.3724/1000-6915.jrme.2025.0465, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1751472000000, receivedDateStr=2025-07-03, revisedDate=1760371200000, revisedDateStr=2025-10-14, acceptedDate=null, acceptedDateStr=null, onlineDate=1781746456756, onlineDateStr=2026-06-18, pubDate=1769875200000, pubDateStr=2026-02-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1781746456756, onlineIssueDateStr=2026-06-18, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1781746456756, creator=13701087609, updateTime=1781746456756, updator=13701087609, issue=Issue{id=1274300092707266809, tenantId=1146029695717560320, journalId=1272208980697911299, year='2026', volume='45', issue='2', pageStart='321', pageEnd='638', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1781746417452, creator=13701087609, updateTime=1781746463571, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1274300286466335306, tenantId=1146029695717560320, journalId=1272208980697911299, issueId=1274300092707266809, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1274300286466335307, tenantId=1146029695717560320, journalId=1272208980697911299, issueId=1274300092707266809, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=412, endPage=431, ext={EN=ArticleExt(id=1274300259404669938, articleId=1274300257559176176, tenantId=1146029695717560320, journalId=1272208980697911299, language=EN, title=Size effect of granite in uniaxial compression considering crack propagation mechanism, columnId=null, journalTitle=Chinese Journal of Rock Mechanics and Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Rock masses often exhibit significant size effects under uniaxial compression, yet the underlying mesoscopic controlling mechanisms and sensitivity to crack parameters remain poorly understood. In this study, we conducted uniaxial compression and acoustic emission (AE) monitoring experiments on granite specimens of various laboratory scales. By incorporating constraints from X-ray diffraction (XRD) mineral composition and AE-guided micro-crack data, we established a numerical model with a pre-existing micro-crack network using the PFC platform. The results indicate that the uniaxial compressive strength, failure mode, and crack propagation of the specimens demonstrate pronounced size dependence: peak strength decreases with increasing specimen size, and the failure mode transitions from splitting to shearing. In a homogeneous mineral matrix model (without pre-existing micro-cracks), the strength is nearly independent of specimen size, suggesting that pre-existing micro-cracks are the primary factor controlling the size effect. Furthermore, crack length has a significantly greater impact on strength degradation than crack number, with smaller specimens being more sensitive to variations in crack parameters. The established model effectively reproduces the experimental results regarding stress-strain behavior, AE event sequences, AF-RA crack classification, and failure patterns, thereby validating the reliability of the multi-scale numerical approach. These findings provide theoretical support for addressing the strength size effect and enhancing the safety design of engineering rock masses under complex geological conditions.
, correspAuthors=Zhanyou LUO, authorNote=null, correspAuthorsNote=
* LUO Zhanyou (1974–), professor, is engaged in research on the
JRC of rock discontinuities, shear strength and pile foundation engineering. E-mail:
luozhanyou@nbu.edu.cn , copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=
YU Qiaojuan (1993–), assistant research fellow, is engaged in research on rock mechanics and other related fields. E-mail: yuqiaojuan@nbu.edu.cn
, authorsList=Qiaojuan YU, Shigui DU, Zeping ZHANG, Guangjian LIU, Zhanyou LUO, Yuanjun LYU), CN=ArticleExt(id=1274300266266550301, articleId=1274300257559176176, tenantId=1146029695717560320, journalId=1272208980697911299, language=CN, title=考虑裂纹扩展机制的花岗岩单轴压缩实验室尺寸效应研究, columnId=1274300094359822588, journalTitle=岩石力学与工程学报, columnName=理论与试验研究, runingTitle=null, highlight=null, articleAbstract=
岩体在单轴压缩下普遍表现出显著的尺寸效应,但其细观主控机制及裂纹参数敏感性仍缺乏系统认知。本文针对花岗岩不同实验室尺寸试样开展了单轴压缩与声发射(acoustic emission,AE)监测实验,并结合X射线衍射矿物组分约束和AE数据引导,基于PFC平台建立含原生裂隙网络的数值模型。结果表明:岩样的单轴抗压强度、破坏模式及裂纹扩展均表现出明显尺寸依赖性,峰值强度随尺寸增大而降低,破坏模式由劈裂向剪切转变。在均质矿物基质模型(无原生裂隙)下,强度基本不随尺寸变化,表明原生裂隙是尺寸效应的主控因素。此外,裂隙长度对强度劣化的影响远高于裂隙数量,且小尺寸试样对裂隙参数变化更为敏感。所建模型在应力–应变、AE时序、AF-RA裂纹分型及破坏形态等方面与试验结果一致,验证多尺度数值模型的可靠性。研究结果可为复杂地质条件下工程岩体的强度尺寸效应修正与安全设计提供理论支撑。
, correspAuthors=罗战友, authorNote=null, correspAuthorsNote=
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1.Rock Mechanics Institute, Ningbo University, Ningbo, Zhejiang 315211, China
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余乔娟(1993–),现任助理研究员,主要从事岩石力学研究等方面的工作。E-mail:yuqiaojuan@nbu.edu.cn
YU Qiaojuan (1993–), assistant research fellow, is engaged in research on rock mechanics and other related fields. E-mail: yuqiaojuan@nbu.edu.cn
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余乔娟(1993–),现任助理研究员,主要从事岩石力学研究等方面的工作。E-mail:yuqiaojuan@nbu.edu.cn
YU Qiaojuan (1993–), assistant research fellow, is engaged in research on rock mechanics and other related fields. E-mail: yuqiaojuan@nbu.edu.cn
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Schematic illustration of acoustic emission signal principle, figureFileSmall=zdCgd7A2fQXlOUAcvaJJTA==, figureFileBig=fpAUdg8upg/wgFRTCH3L2g==, tableContent=null), ArticleFig(id=1274368937207816572, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=SFLfOL3O35Ia9kZ8N5m1Rw==, figureFileBig=4xlTMWO6OK4rUikJTNh1BQ==, tableContent=null), ArticleFig(id=1274368937518195070, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.4, caption=
Optical micrograph of granite, figureFileSmall=SFLfOL3O35Ia9kZ8N5m1Rw==, figureFileBig=4xlTMWO6OK4rUikJTNh1BQ==, tableContent=null), ArticleFig(id=1274368937581109631, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=N1mrTPZ2kz70nUWnR6YJcw==, figureFileBig=qVz9gw7zKkw46KZFbSnZlw==, tableContent=null), ArticleFig(id=1274368937874710912, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.5, caption=
Mineralogical composition and X-ray diffraction results of granite, figureFileSmall=N1mrTPZ2kz70nUWnR6YJcw==, figureFileBig=qVz9gw7zKkw46KZFbSnZlw==, tableContent=null), ArticleFig(id=1274368937937625473, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=9ajVKDhKz58+WlAMoZZR2g==, figureFileBig=+m9Hv+7chCqz2VYgHSVQEg==, tableContent=null), ArticleFig(id=1274368938004734338, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.6, caption=
Schematic diagram of the evolution of mechanical behaviors during the whole fracture process of granite, figureFileSmall=9ajVKDhKz58+WlAMoZZR2g==, figureFileBig=+m9Hv+7chCqz2VYgHSVQEg==, tableContent=null), ArticleFig(id=1274368938369638787, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=CvC81imhgOzt1eX29KbWKA==, figureFileBig=YO8HICcpdQgMprfNc/KanA==, tableContent=null), ArticleFig(id=1274368938705183108, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.7, caption=
Time evolution of stress,AE ringing (event) count rate,and cumulative energy during loading for granite specimens of different sizes, figureFileSmall=CvC81imhgOzt1eX29KbWKA==, figureFileBig=YO8HICcpdQgMprfNc/KanA==, tableContent=null), ArticleFig(id=1274368938789069189, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=8eoRviv88sos2JsfDpUN1g==, figureFileBig=LAmSx7OtSzRFttyxyw8fkQ==, tableContent=null), ArticleFig(id=1274368939112030599, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.8, caption=
Failure modes of granite specimens with different sizes under uniaxial compression, figureFileSmall=8eoRviv88sos2JsfDpUN1g==, figureFileBig=LAmSx7OtSzRFttyxyw8fkQ==, tableContent=null), ArticleFig(id=1274368939200110984, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=sU8RJJzAvXXU97iDI/prcA==, figureFileBig=Yfqx+ZZ9BBTTCCJDX87sCg==, tableContent=null), ArticleFig(id=1274368939548238217, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.9, caption=
3D spatial localization of acoustic emission events during loading for granite specimens of different sizes, figureFileSmall=sU8RJJzAvXXU97iDI/prcA==, figureFileBig=Yfqx+ZZ9BBTTCCJDX87sCg==, tableContent=null), ArticleFig(id=1274368939602764170, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=S1nQqQKiTF2pM3ncu26nlg==, figureFileBig=X68BWvdEtcKM4wwonXBtvg==, tableContent=null), ArticleFig(id=1274368939661484427, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.10, caption=
Schematic diagram of AF-RA scatter distribution and cracking opening modes, figureFileSmall=S1nQqQKiTF2pM3ncu26nlg==, figureFileBig=X68BWvdEtcKM4wwonXBtvg==, tableContent=null), ArticleFig(id=1274368939741176204, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=thlisTx1tAVgkFtQdLrtog==, figureFileBig=HOcNkhuB4dwtIjUjb5HQTw==, tableContent=null), ArticleFig(id=1274368939812479373, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.11, caption=
AF-RA scatter plots and tensile/shear crack classification for granite specimens of different sizes, figureFileSmall=thlisTx1tAVgkFtQdLrtog==, figureFileBig=HOcNkhuB4dwtIjUjb5HQTw==, tableContent=null), ArticleFig(id=1274368939959280014, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=xZ6p6909DdFovc9KnWHI7w==, figureFileBig=8L1A21sPwTS/HHZ7Owsh2w==, tableContent=null), ArticleFig(id=1274368940030583183, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.12, caption=
Schematic diagram of the establishment process for the granite mineral matrix-microcrack model, figureFileSmall=xZ6p6909DdFovc9KnWHI7w==, figureFileBig=8L1A21sPwTS/HHZ7Owsh2w==, tableContent=null), ArticleFig(id=1274368940097692048, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=GwdZ8SzeP2gziaqmWGkgng==, figureFileBig=bfTU6F1fw+o7fswvJLFDZg==, tableContent=null), ArticleFig(id=1274368940160606609, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.13, caption=
Granite mineral matrix particle distribution and composition modeling in PFC2D, figureFileSmall=GwdZ8SzeP2gziaqmWGkgng==, figureFileBig=bfTU6F1fw+o7fswvJLFDZg==, tableContent=null), ArticleFig(id=1274368940370321810, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=1BlYAj2QK46alDkTw4gCcA==, figureFileBig=i6Mm6hiEYstGUpmyYDjX2Q==, tableContent=null), ArticleFig(id=1274368940445819283, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.14, caption=
Reconstruction schematic diagram of primary crack networks in granite specimens with different sizes, figureFileSmall=1BlYAj2QK46alDkTw4gCcA==, figureFileBig=i6Mm6hiEYstGUpmyYDjX2Q==, tableContent=null), ArticleFig(id=1274368940508733844, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=lkLNiwE7ffRXtZxrHH9U4g==, figureFileBig=vROhvOuEEP8qZ3k5Y0o7mQ==, tableContent=null), ArticleFig(id=1274368940571648405, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.15, caption=
Representation of cracks by bond failure in the PFC2D model, figureFileSmall=lkLNiwE7ffRXtZxrHH9U4g==, figureFileBig=vROhvOuEEP8qZ3k5Y0o7mQ==, tableContent=null), ArticleFig(id=1274368940626174358, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=XRoRqnw5GMMavjl+3sUssw==, figureFileBig=f+QuO4CoyM0jREj088Av+g==, tableContent=null), ArticleFig(id=1274368940798140823, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.16, caption=
AE-clustered defect priors(Penny-Shaped[34]) and geometric definitions, figureFileSmall=XRoRqnw5GMMavjl+3sUssw==, figureFileBig=f+QuO4CoyM0jREj088Av+g==, tableContent=null), ArticleFig(id=1274368940861055384, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=Q144FjevsFmSv/DnWIFP/g==, figureFileBig=2B4dW4O2b1O17IX/eG5IhQ==, tableContent=null), ArticleFig(id=1274368940928164249, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.17, caption=
Effects of crack length and number on the mechanical behavior of granite specimens of varying sizes, figureFileSmall=Q144FjevsFmSv/DnWIFP/g==, figureFileBig=2B4dW4O2b1O17IX/eG5IhQ==, tableContent=null), ArticleFig(id=1274368940991078810, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=kuiUdCPr6xShAq3z86H4ww==, figureFileBig=LEUwV3YWajPJq/0qg/cmKw==, tableContent=null), ArticleFig(id=1274368941074964891, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.18, caption=
Predicted stress-strain curves of matrix numerical model, figureFileSmall=kuiUdCPr6xShAq3z86H4ww==, figureFileBig=LEUwV3YWajPJq/0qg/cmKw==, tableContent=null), ArticleFig(id=1274368941230154140, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=k7lCqCBWsuui0vQj7xRAfQ==, figureFileBig=5NPomUtM/OPndQWhUSJfRg==, tableContent=null), ArticleFig(id=1274368941293068701, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.19, caption=
Predicted stress-strain curves and failure modes of the rock model, figureFileSmall=k7lCqCBWsuui0vQj7xRAfQ==, figureFileBig=5NPomUtM/OPndQWhUSJfRg==, tableContent=null), ArticleFig(id=1274368941368566174, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=x+SNnYcdwhb72hiOcxLK5w==, figureFileBig=t06j/lAEKKuIcMe8y6jbqA==, tableContent=null), ArticleFig(id=1274368941448257951, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.20, caption=
Comparison of uniaxial compressive strength between rock model and mineral matrix model, figureFileSmall=x+SNnYcdwhb72hiOcxLK5w==, figureFileBig=t06j/lAEKKuIcMe8y6jbqA==, tableContent=null), ArticleFig(id=1274368941649584544, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=PdStQ4DwOOR5mwBRNnWM6A==, figureFileBig=voBQHxWQpNnrKU4WGspMcw==, tableContent=null), ArticleFig(id=1274368941725082017, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Fig.21, caption=
Comparisons between numerical model predictions and experimental results of granite specimens, figureFileSmall=PdStQ4DwOOR5mwBRNnWM6A==, figureFileBig=voBQHxWQpNnrKU4WGspMcw==, tableContent=null), ArticleFig(id=1274368941817356706, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Mineral types | Volume fraction/% | Density/(kg·m-3) | Grain‑size range/mm |
|---|
| K-feldspar | 12 | 2 560 | 1~6 |
| Albite | 59 | 2 560 | 1~6 |
| Biotite | 5 | 2 700 | 0.5~3 |
| Quartz | 23 | 2 650 | 0.1~1 |
), ArticleFig(id=1274368941897048483, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Table 1, caption=
Physical parameters and composition of granite mineral matrix
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mineral types | Volume fraction/% | Density/(kg·m-3) | Grain‑size range/mm |
|---|
| K-feldspar | 12 | 2 560 | 1~6 |
| Albite | 59 | 2 560 | 1~6 |
| Biotite | 5 | 2 700 | 0.5~3 |
| Quartz | 23 | 2 650 | 0.1~1 |
), ArticleFig(id=1274368942056432036, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Mineral | Particle-particle contact modulus | Bond elastic modulus | Bond stiffness ratio | Particle friction coefficient | Bond gap | Mean bond normal strength | Mean bond shear strength |
|---|
| K-feldspar | 65 | 40 | 0.70 | 0.6 | 0.001 | 185 | 100 |
| Albite | 60 | 30 | 0.70 | 0.6 | 0.001 | 190 | 105 |
| Biotite | 50 | 20 | 0.70 | 0.6 | 0.001 | 170 | 90 |
| Quartz | 70 | 35 | 0.70 | 0.6 | 0.001 | 185 | 100 |
| Other particles | 55 | 40 | 0.75 | 0.6 | 0.001 | 195 | 105 |
), ArticleFig(id=1274368942131929509, tenantId=1146029695717560320, journalId=1272208980697911299, articleId=1274300257559176176, language=CN, label=Table 2, caption=
Value of matrix model parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mineral | Particle-particle contact modulus | Bond elastic modulus | Bond stiffness ratio | Particle friction coefficient | Bond gap | Mean bond normal strength | Mean bond shear strength |
|---|
| K-feldspar | 65 | 40 | 0.70 | 0.6 | 0.001 | 185 | 100 |
| Albite | 60 | 30 | 0.70 | 0.6 | 0.001 | 190 | 105 |
| Biotite | 50 | 20 | 0.70 | 0.6 | 0.001 | 170 | 90 |
| Quartz | 70 | 35 | 0.70 | 0.6 | 0.001 | 185 | 100 |
| Other particles | 55 | 40 | 0.75 | 0.6 | 0.001 | 195 | 105 |
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