Article(id=1241046469273252233, tenantId=1146029695717560320, journalId=1240670690148397066, issueId=1241046461174043350, articleNumber=null, orderNo=null, doi=10.3963/j.issn.1001-487X.2025.01.005, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1713110400000, receivedDateStr=2024-04-15, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773818135803, onlineDateStr=2026-03-18, pubDate=1747670400000, pubDateStr=2025-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773818135803, onlineIssueDateStr=2026-03-18, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773818135803, creator=13701087609, updateTime=1773818135803, updator=13701087609, issue=Issue{id=1241046461174043350, tenantId=1146029695717560320, journalId=1240670690148397066, year='2025', volume='42', issue='1', pageStart='1', pageEnd='198', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=0, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773818133871, creator=13701087609, updateTime=1773820872662, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241057948554817923, tenantId=1146029695717560320, journalId=1240670690148397066, issueId=1241046461174043350, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241057948554817924, tenantId=1146029695717560320, journalId=1240670690148397066, issueId=1241046461174043350, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=37, endPage=43, ext={EN=ArticleExt(id=1241046470145667487, articleId=1241046469273252233, tenantId=1146029695717560320, journalId=1240670690148397066, language=EN, title=Experimental Study on Fracture Toughness and Crack Propagation Characteristics of Slate under Dynamic Loading, columnId=1240702071733801442, journalTitle=Blasting, columnName=THEORETICAL AND TECHNOLOGICAL EXPLORATION, runingTitle=null, highlight=null, articleAbstract=
To investigate the fracture toughness of natural slate under dynamic loading, dynamic impact tests were conducted on notched semi-circular bending slate specimens by a 50 mm diameter split Hopkinson pressure bar testing system and the crack growth process was recorded by the high-speed cameras. Furthermore, the dynamic fracture toughness and crack propagation rate of slate under different impact pressure and prefabricated crack lengths were studied. The results show that the dynamic fracture toughness of the specimen is positively correlated with the impact pressure and loading rate, and the dynamic fracture toughness first increases and then decreases with the rise of the prefabricated crack length. According to the fitting results, the dynamic fracture toughness of the specimen reaches the maximum value when the prefab crack length is 7.45 mm. The maximum values of dynamic fracture toughness at 0.2, 0.3 and 0.4 MPa were 2.99, 3.57 and 4.14 GPa·m1/2, respectively. The failure process of the specimen can be divided into five stages: dynamic damage, crack propagation, crack formation, crack propagation, and specimen fracture. The propagation speed of the main crack of the specimen greatly fluctuates, while the prefabricated crack length has little effect on the propagation velocity of the specimen. The study revealed the differences in dynamic fracture behavior of slate specimens under different working conditions.
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WANG Hai-bo(1983-), male, Ph. D, professor, doctoral supervisor, mainly engaged in research on blasting theory and technology, as well as impact dynamics, (E-mail)
wanghb_aust@163.com.
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为探究动载作用下天然板岩的断裂韧度,论文采用板岩制作直切槽半圆盘弯曲试样(NSCB),利用直径50 mm分离式霍普金森压杆(SHPB)试验系统进行了动态冲击试验,同时使用高速摄像机记录了其裂纹扩展过程,研究了不同冲击气压和预制裂纹长度下板岩的动态断裂韧度及裂纹扩展速度。结果表明:试件的动态断裂韧度与冲击气压和加载率呈现正相关,而随着预制裂纹长度的增加动态断裂韧度先增加后减小,根据拟合结果,当预制裂纹长度为7.45 mm时试件的动态断裂韧度达到最大值,0.2、0.3和0.4 MPa三种冲击气压下对应的动态断裂韧度最大值分别为2.99、3.57和4.14 GPa·m1/2;试件的破坏过程可以分为动态损伤、裂纹孕育、裂纹形成、裂纹扩展和试件断裂五个阶段;试件主裂纹的扩展速度波动较大,而预制裂纹长度对试件裂纹扩展速度的影响较小。研究揭示了不同工况下板岩试件动态断裂行为的差异,对该类岩性地下工程支护、爆破参数设计具有一定的参考意义。
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张建国(1968-),男,学士、教授级高级工程师,主要从事隧道施工管理工作,(E-mail)2760683453@qq.com。
ZHANG Jian-guo (1968-), male, bachelor, professor of engineering, mainly engaged in tunnel construction management work, (E-mail) 2760683453@qq.com.
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1.China Communications Second Highway Engineering Bureau Limited Company, Xi'an 710000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241057547961029600, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, authorId=1241057547629679572, language=CN, stringName=张建国, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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张建国(1968-),男,学士、教授级高级工程师,主要从事隧道施工管理工作,(E-mail)2760683453@qq.com。
ZHANG Jian-guo (1968-), male, bachelor, professor of engineering, mainly engaged in tunnel construction management work, (E-mail) 2760683453@qq.com.
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张建国(1968-),男,学士、教授级高级工程师,主要从事隧道施工管理工作,(E-mail)2760683453@qq.com。
ZHANG Jian-guo (1968-), male, bachelor, professor of engineering, mainly engaged in tunnel construction management work, (E-mail) 2760683453@qq.com.
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2.School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241057551584907402, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, authorId=1241057551358414971, language=CN, stringName=邢永杨, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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典型NSCB试件的加载率确定方法, figureFileSmall=BUPH7rpzwdNCoyoKrwua0A==, figureFileBig=g5UCa7c4VByJVpRoJfAlOg==, tableContent=null), ArticleFig(id=1241057559788966299, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=EN, label=Fig. 5, caption=
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动态断裂韧度随冲击气压与预制裂纹长度的变化关系, figureFileSmall=g/zivc24cCh+aTthwv43DA==, figureFileBig=9ZF0x+PXPVQDwyqatRp98g==, tableContent=null), ArticleFig(id=1241057560011264419, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=EN, label=Fig. 6, caption=
The variation of dynamic fracture toughness with loading rate, figureFileSmall=gguzWJa1IkTifDU3WFoRzg==, figureFileBig=I42UrbTyUneV8qvp42HI8Q==, tableContent=null), ArticleFig(id=1241057560116122020, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=CN, label=图6, caption=
动态断裂韧度随加载率的变化, figureFileSmall=gguzWJa1IkTifDU3WFoRzg==, figureFileBig=I42UrbTyUneV8qvp42HI8Q==, tableContent=null), ArticleFig(id=1241057560220979627, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=EN, label=Fig. 7, caption=
Analysis of specimen failure process, figureFileSmall=OwSis7vLpGd7dwWXOkkxBQ==, figureFileBig=7OsA+olBvmKJdrG13Y+Sug==, tableContent=null), ArticleFig(id=1241057560304865713, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=CN, label=图7, caption=
试件破坏过程分析, figureFileSmall=OwSis7vLpGd7dwWXOkkxBQ==, figureFileBig=7OsA+olBvmKJdrG13Y+Sug==, tableContent=null), ArticleFig(id=1241057560422306233, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=EN, label=Fig. 8, caption=
Final failure mode of the specimens, figureFileSmall=WW6WZHxhIZP3ENSA3IvXZQ==, figureFileBig=TwWDjKy596qkhbgzW+zpIw==, tableContent=null), ArticleFig(id=1241057560506192317, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=CN, label=图8, caption=
不同试件最终破坏形态, figureFileSmall=WW6WZHxhIZP3ENSA3IvXZQ==, figureFileBig=TwWDjKy596qkhbgzW+zpIw==, tableContent=null), ArticleFig(id=1241057560686547394, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=EN, label=Fig. 9, caption=
The crack propagation speed of specimens with different prefabricated crack lengths under different impact pressures, figureFileSmall=O7zwTXSF19szawqgKaww/A==, figureFileBig=5TgBuheJLz+Ck3+OM5MJ3A==, tableContent=null), ArticleFig(id=1241057560753656262, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=CN, label=图9, caption=
不同冲击气压下不同预制裂纹长度试件的裂纹扩展速度, figureFileSmall=O7zwTXSF19szawqgKaww/A==, figureFileBig=5TgBuheJLz+Ck3+OM5MJ3A==, tableContent=null), ArticleFig(id=1241057560824959435, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=EN, label=Table 1, caption=
Calculation results of fracture toughness and loading rate of specimens
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试件编号 | 冲击气压/MPa | 预制裂纹长度/mm | 加载率/(GPa·m1/2·s-1) | 动态断裂韧度/(MPa·m1/2) |
|---|
| N-1 | 0.2 | 5 | 16.03 | 0.74 |
| N-2 | 0.2 | 7 | 52.01 | 3.01 |
| N-3 | 0.2 | 9 | 35.01 | 2.35 |
| N-4 | 0.3 | 5 | 34.97 | 1.45 |
| N-5 | 0.3 | 7 | 81.95 | 3.50 |
| N-6 | 0.3 | 9 | 38.94 | 2.38 |
| N-7 | 0.4 | 5 | 42.43 | 2.10 |
| N-8 | 0.4 | 7 | 100.42 | 3.94 |
| N-9 | 0.4 | 9 | 63.18 | 3.55 |
), ArticleFig(id=1241057560892068302, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241046469273252233, language=CN, label=表1, caption=
试件断裂韧度及加载率计算结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试件编号 | 冲击气压/MPa | 预制裂纹长度/mm | 加载率/(GPa·m1/2·s-1) | 动态断裂韧度/(MPa·m1/2) |
|---|
| N-1 | 0.2 | 5 | 16.03 | 0.74 |
| N-2 | 0.2 | 7 | 52.01 | 3.01 |
| N-3 | 0.2 | 9 | 35.01 | 2.35 |
| N-4 | 0.3 | 5 | 34.97 | 1.45 |
| N-5 | 0.3 | 7 | 81.95 | 3.50 |
| N-6 | 0.3 | 9 | 38.94 | 2.38 |
| N-7 | 0.4 | 5 | 42.43 | 2.10 |
| N-8 | 0.4 | 7 | 100.42 | 3.94 |
| N-9 | 0.4 | 9 | 63.18 | 3.55 |
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