Cracking behaviors and strength of rock-like samples with steps of different geometries under shear stress
Steps are distinctive features for estimating the movement of the upper and lower block of faults. However, studies about the influence of steps as a special type of discontinuity on cracking behaviors and strength of rock masses are limited. In this research, rock-like samples with steps and preexi...
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| Veröffentlicht in: | Journal of mountain science 2021-05, Vol.18 (5), p.1352-1370 |
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| creator | Le, Hui-lin Wei, Ji-hong Sun, Shao-rui Zhang, Chu-chu |
| description | Steps are distinctive features for estimating the movement of the upper and lower block of faults. However, studies about the influence of steps as a special type of discontinuity on cracking behaviors and strength of rock masses are limited. In this research, rock-like samples with steps and preexisting flaws were fabricated. Step height
h
and the inclination angle of gentle slope of the step
α
were set to different values. Direct shear tests were conducted on these samples under different normal stresses. The experimental results reveal that the inclination angle of the gentle slope of the step
a
, step height
h
, and normal stress have an influence on the strength, crack initiation, and crack propagation of the samples. The experimental results show that crack behaviors and shear strength were affected by step inclination angles
α
and step height
h.
As the normal stress increases, the improvement of the strength of samples with a large step height is larger than that of samples with a small step height, the improvement of the strength of samples with
α
of 10° is larger than that of samples with
α
of 0° and −10°. The discrete element method was used to simulate the shear test. Numerical results show five different types of displacement vectors, which can be used to determine whether the cracks are tensile cracks or shear cracks. The above conclusions can provide help for estimating mechanical properties and failure modes of rock masses with steps of different geometries. |
| doi_str_mv | 10.1007/s11629-020-6443-2 |
| format | Article |
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h
and the inclination angle of gentle slope of the step
α
were set to different values. Direct shear tests were conducted on these samples under different normal stresses. The experimental results reveal that the inclination angle of the gentle slope of the step
a
, step height
h
, and normal stress have an influence on the strength, crack initiation, and crack propagation of the samples. The experimental results show that crack behaviors and shear strength were affected by step inclination angles
α
and step height
h.
As the normal stress increases, the improvement of the strength of samples with a large step height is larger than that of samples with a small step height, the improvement of the strength of samples with
α
of 10° is larger than that of samples with
α
of 0° and −10°. The discrete element method was used to simulate the shear test. Numerical results show five different types of displacement vectors, which can be used to determine whether the cracks are tensile cracks or shear cracks. The above conclusions can provide help for estimating mechanical properties and failure modes of rock masses with steps of different geometries.</description><identifier>ISSN: 1672-6316</identifier><identifier>EISSN: 1993-0321</identifier><identifier>EISSN: 1008-2786</identifier><identifier>DOI: 10.1007/s11629-020-6443-2</identifier><language>eng</language><publisher>Heidelberg: Science Press</publisher><subject>Crack initiation ; Crack propagation ; Cracks ; Discrete element method ; Earth and Environmental Science ; Earth Sciences ; Ecology ; Environment ; Estimation ; Failure modes ; Geography ; Height ; Inclination angle ; Mechanical properties ; Original Article ; Rock masses ; Rocks ; Shear strength ; Shear stress ; Shear tests ; Stress propagation ; Vectors</subject><ispartof>Journal of mountain science, 2021-05, Vol.18 (5), p.1352-1370</ispartof><rights>Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2021</rights><rights>Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2021.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c316t-a68ae562b2eadae3689c1688fc19c964fdae2880ffddddf9b548c5f0b0f547e53</citedby><cites>FETCH-LOGICAL-c316t-a68ae562b2eadae3689c1688fc19c964fdae2880ffddddf9b548c5f0b0f547e53</cites><orcidid>0000-0002-2039-2086 ; 0000-0003-0328-5120 ; 0000-0002-9993-4481 ; 0000-0003-2080-2126</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11629-020-6443-2$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11629-020-6443-2$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Le, Hui-lin</creatorcontrib><creatorcontrib>Wei, Ji-hong</creatorcontrib><creatorcontrib>Sun, Shao-rui</creatorcontrib><creatorcontrib>Zhang, Chu-chu</creatorcontrib><title>Cracking behaviors and strength of rock-like samples with steps of different geometries under shear stress</title><title>Journal of mountain science</title><addtitle>J. Mt. Sci</addtitle><description>Steps are distinctive features for estimating the movement of the upper and lower block of faults. However, studies about the influence of steps as a special type of discontinuity on cracking behaviors and strength of rock masses are limited. In this research, rock-like samples with steps and preexisting flaws were fabricated. Step height
h
and the inclination angle of gentle slope of the step
α
were set to different values. Direct shear tests were conducted on these samples under different normal stresses. The experimental results reveal that the inclination angle of the gentle slope of the step
a
, step height
h
, and normal stress have an influence on the strength, crack initiation, and crack propagation of the samples. The experimental results show that crack behaviors and shear strength were affected by step inclination angles
α
and step height
h.
As the normal stress increases, the improvement of the strength of samples with a large step height is larger than that of samples with a small step height, the improvement of the strength of samples with
α
of 10° is larger than that of samples with
α
of 0° and −10°. The discrete element method was used to simulate the shear test. Numerical results show five different types of displacement vectors, which can be used to determine whether the cracks are tensile cracks or shear cracks. The above conclusions can provide help for estimating mechanical properties and failure modes of rock masses with steps of different geometries.</description><subject>Crack initiation</subject><subject>Crack propagation</subject><subject>Cracks</subject><subject>Discrete element method</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Ecology</subject><subject>Environment</subject><subject>Estimation</subject><subject>Failure modes</subject><subject>Geography</subject><subject>Height</subject><subject>Inclination angle</subject><subject>Mechanical properties</subject><subject>Original Article</subject><subject>Rock masses</subject><subject>Rocks</subject><subject>Shear strength</subject><subject>Shear stress</subject><subject>Shear tests</subject><subject>Stress propagation</subject><subject>Vectors</subject><issn>1672-6316</issn><issn>1993-0321</issn><issn>1008-2786</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp1kEtPxCAUhYnRxHH0B7gjcY0CbSkszcRXYuJG14TSS6fzaCu3o_HfS62JK9lA7vnOueQQcin4teC8vEEhlDSMS85UnmdMHpGFMCZjPJPiOL1VKZnKhDolZ4gbzlVptFiQzSo6v227hlawdh9tH5G6rqY4RuiacU37QGPvt2zXboGi2w87QPrZJgVHGHDS6zYESPhIG-j3MMY2IYeuhkhxDS7-hCGek5PgdggXv_eSvN3fva4e2fPLw9Pq9pn59L2ROaUdFEpWElztIFPaeKG0Dl4Yb1Qe0lBqzUOo0wmmKnLti8ArHoq8hCJbkqs5d4j9-wFwtJv-ELu00spCKp0XuZwoMVM-9ogRgh1iu3fxywpup0rtXKlNldqpUiuTR84eTGzXQPxL_t_0DW_be74</recordid><startdate>20210501</startdate><enddate>20210501</enddate><creator>Le, Hui-lin</creator><creator>Wei, Ji-hong</creator><creator>Sun, Shao-rui</creator><creator>Zhang, Chu-chu</creator><general>Science Press</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0002-2039-2086</orcidid><orcidid>https://orcid.org/0000-0003-0328-5120</orcidid><orcidid>https://orcid.org/0000-0002-9993-4481</orcidid><orcidid>https://orcid.org/0000-0003-2080-2126</orcidid></search><sort><creationdate>20210501</creationdate><title>Cracking behaviors and strength of rock-like samples with steps of different geometries under shear stress</title><author>Le, Hui-lin ; Wei, Ji-hong ; Sun, Shao-rui ; Zhang, Chu-chu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c316t-a68ae562b2eadae3689c1688fc19c964fdae2880ffddddf9b548c5f0b0f547e53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Crack initiation</topic><topic>Crack propagation</topic><topic>Cracks</topic><topic>Discrete element method</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Ecology</topic><topic>Environment</topic><topic>Estimation</topic><topic>Failure modes</topic><topic>Geography</topic><topic>Height</topic><topic>Inclination angle</topic><topic>Mechanical properties</topic><topic>Original Article</topic><topic>Rock masses</topic><topic>Rocks</topic><topic>Shear strength</topic><topic>Shear stress</topic><topic>Shear tests</topic><topic>Stress propagation</topic><topic>Vectors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Le, Hui-lin</creatorcontrib><creatorcontrib>Wei, Ji-hong</creatorcontrib><creatorcontrib>Sun, Shao-rui</creatorcontrib><creatorcontrib>Zhang, Chu-chu</creatorcontrib><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Environment Abstracts</collection><jtitle>Journal of mountain science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Le, Hui-lin</au><au>Wei, Ji-hong</au><au>Sun, Shao-rui</au><au>Zhang, Chu-chu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Cracking behaviors and strength of rock-like samples with steps of different geometries under shear stress</atitle><jtitle>Journal of mountain science</jtitle><stitle>J. Mt. Sci</stitle><date>2021-05-01</date><risdate>2021</risdate><volume>18</volume><issue>5</issue><spage>1352</spage><epage>1370</epage><pages>1352-1370</pages><issn>1672-6316</issn><eissn>1993-0321</eissn><eissn>1008-2786</eissn><abstract>Steps are distinctive features for estimating the movement of the upper and lower block of faults. However, studies about the influence of steps as a special type of discontinuity on cracking behaviors and strength of rock masses are limited. In this research, rock-like samples with steps and preexisting flaws were fabricated. Step height
h
and the inclination angle of gentle slope of the step
α
were set to different values. Direct shear tests were conducted on these samples under different normal stresses. The experimental results reveal that the inclination angle of the gentle slope of the step
a
, step height
h
, and normal stress have an influence on the strength, crack initiation, and crack propagation of the samples. The experimental results show that crack behaviors and shear strength were affected by step inclination angles
α
and step height
h.
As the normal stress increases, the improvement of the strength of samples with a large step height is larger than that of samples with a small step height, the improvement of the strength of samples with
α
of 10° is larger than that of samples with
α
of 0° and −10°. The discrete element method was used to simulate the shear test. Numerical results show five different types of displacement vectors, which can be used to determine whether the cracks are tensile cracks or shear cracks. The above conclusions can provide help for estimating mechanical properties and failure modes of rock masses with steps of different geometries.</abstract><cop>Heidelberg</cop><pub>Science Press</pub><doi>10.1007/s11629-020-6443-2</doi><tpages>19</tpages><orcidid>https://orcid.org/0000-0002-2039-2086</orcidid><orcidid>https://orcid.org/0000-0003-0328-5120</orcidid><orcidid>https://orcid.org/0000-0002-9993-4481</orcidid><orcidid>https://orcid.org/0000-0003-2080-2126</orcidid></addata></record> |
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| source | SpringerNature Journals; Alma/SFX Local Collection |
| subjects | Crack initiation Crack propagation Cracks Discrete element method Earth and Environmental Science Earth Sciences Ecology Environment Estimation Failure modes Geography Height Inclination angle Mechanical properties Original Article Rock masses Rocks Shear strength Shear stress Shear tests Stress propagation Vectors |
| title | Cracking behaviors and strength of rock-like samples with steps of different geometries under shear stress |
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