An anisotropic constitutive model of geomaterials based on true triaxial testing and its application
Series of testing on coarse grained soils were carried out with a true triaxial testing apparatus. The loads were applied from the major principal and minor principal directions, respectively, to simulate the construction and water impounding process of a rock fill dam. The stress and strain relatio...
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| Veröffentlicht in: | Journal of Central South University 2017-06, Vol.24 (6), p.1430-1442 |
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| creator | 张坤勇 Frederick Nai Charkley |
| description | Series of testing on coarse grained soils were carried out with a true triaxial testing apparatus. The loads were applied from the major principal and minor principal directions, respectively, to simulate the construction and water impounding process of a rock fill dam. The stress and strain relationships induced by the different loading methods were investigated. A remarkable stress-induced anisotropy under complex stress state was observed. Contrary to popular assumptions in traditional numerical analysis and constitutive models, it was found that different elastic modulus and Poisson ratio exist in different principal directions in rock fill dams. From the testing results, an anisotropic constitutive model based on Duncan-Chang nonlinear model is presented to overcome the limitations of axi-symmetric assumptions in conventional triaxial experiments and constitutive models. Both models were then applied in FEM analysis of an under-construction earth core high rock soil filled dam with the focus on hydraulic fracturing. The study reveals the major biases that exist when numerical analysis and constitutive models do not give serious consideration to the intermediate principal stress and anisotropy effects in soil rock built structures. |
| doi_str_mv | 10.1007/s11771-017-3547-0 |
| format | Article |
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The loads were applied from the major principal and minor principal directions, respectively, to simulate the construction and water impounding process of a rock fill dam. The stress and strain relationships induced by the different loading methods were investigated. A remarkable stress-induced anisotropy under complex stress state was observed. Contrary to popular assumptions in traditional numerical analysis and constitutive models, it was found that different elastic modulus and Poisson ratio exist in different principal directions in rock fill dams. From the testing results, an anisotropic constitutive model based on Duncan-Chang nonlinear model is presented to overcome the limitations of axi-symmetric assumptions in conventional triaxial experiments and constitutive models. Both models were then applied in FEM analysis of an under-construction earth core high rock soil filled dam with the focus on hydraulic fracturing. The study reveals the major biases that exist when numerical analysis and constitutive models do not give serious consideration to the intermediate principal stress and anisotropy effects in soil rock built structures.</description><identifier>ISSN: 2095-2899</identifier><identifier>EISSN: 2227-5223</identifier><identifier>DOI: 10.1007/s11771-017-3547-0</identifier><language>eng</language><publisher>Changsha: Central South University</publisher><subject>Anisotropy ; Coarse-grained soils ; complex ; Computer simulation ; constitutive ; Constitutive models ; Dam construction ; Earth core ; element ; Engineering ; FEM ; finite ; Finite element method ; Geomaterials ; Hydraulic fracturing ; induced ; Loads (forces) ; Mathematical models ; Metallic Materials ; method ; Modulus of elasticity ; Numerical analysis ; Poisson's ratio ; Rocks ; Soil structure ; state ; Strain ; stress ; Stresses ; test ; Test equipment ; triaxial ; Triaxial tests ; true</subject><ispartof>Journal of Central South University, 2017-06, Vol.24 (6), p.1430-1442</ispartof><rights>Central South University Press and Springer-Verlag GmbH Germany 2017</rights><rights>Copyright Springer Science & Business Media 2017</rights><rights>Copyright © Wanfang Data Co. 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All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c380t-f0fb3fb341b5fcecf12f21be78c6de58ce58a7520b81013e4e2c76e629f345e33</citedby><cites>FETCH-LOGICAL-c380t-f0fb3fb341b5fcecf12f21be78c6de58ce58a7520b81013e4e2c76e629f345e33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/85521A/85521A.jpg</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11771-017-3547-0$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11771-017-3547-0$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,777,781,27905,27906,41469,42538,51300</link.rule.ids></links><search><creatorcontrib>张坤勇;Frederick Nai Charkley</creatorcontrib><title>An anisotropic constitutive model of geomaterials based on true triaxial testing and its application</title><title>Journal of Central South University</title><addtitle>J. Cent. South Univ</addtitle><addtitle>Journal of Central South University of Technology</addtitle><description>Series of testing on coarse grained soils were carried out with a true triaxial testing apparatus. The loads were applied from the major principal and minor principal directions, respectively, to simulate the construction and water impounding process of a rock fill dam. The stress and strain relationships induced by the different loading methods were investigated. A remarkable stress-induced anisotropy under complex stress state was observed. Contrary to popular assumptions in traditional numerical analysis and constitutive models, it was found that different elastic modulus and Poisson ratio exist in different principal directions in rock fill dams. From the testing results, an anisotropic constitutive model based on Duncan-Chang nonlinear model is presented to overcome the limitations of axi-symmetric assumptions in conventional triaxial experiments and constitutive models. Both models were then applied in FEM analysis of an under-construction earth core high rock soil filled dam with the focus on hydraulic fracturing. The study reveals the major biases that exist when numerical analysis and constitutive models do not give serious consideration to the intermediate principal stress and anisotropy effects in soil rock built structures.</description><subject>Anisotropy</subject><subject>Coarse-grained soils</subject><subject>complex</subject><subject>Computer simulation</subject><subject>constitutive</subject><subject>Constitutive models</subject><subject>Dam construction</subject><subject>Earth core</subject><subject>element</subject><subject>Engineering</subject><subject>FEM</subject><subject>finite</subject><subject>Finite element method</subject><subject>Geomaterials</subject><subject>Hydraulic fracturing</subject><subject>induced</subject><subject>Loads (forces)</subject><subject>Mathematical models</subject><subject>Metallic Materials</subject><subject>method</subject><subject>Modulus of elasticity</subject><subject>Numerical analysis</subject><subject>Poisson's ratio</subject><subject>Rocks</subject><subject>Soil structure</subject><subject>state</subject><subject>Strain</subject><subject>stress</subject><subject>Stresses</subject><subject>test</subject><subject>Test equipment</subject><subject>triaxial</subject><subject>Triaxial tests</subject><subject>true</subject><issn>2095-2899</issn><issn>2227-5223</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9kUFr3DAQhUVJoWGTH9CboMfidCStLfsYQpsEAr20ZyHLI1dlV3IkbbvJr-8sDm1PAUkjxPveDE-MvRdwJQD0pyKE1qIBoRvVbnUDb9i5lFI3rZTqjO4wtI3sh-EduywljKCE7FQ3dOdsuo7cxlBSzWkJjrsUSw31UMMv5Ps04Y4nz2dMe1sxB7srfLQFJ54ir_mAdAR7pHdekcA4k9vEQy3cLssuOFtDihfsrScSL1_qhn3_8vnbzV3z8PX2_ub6oXGqh9p48KOitRVj6x06L6SXYkTdu27Ctne0rW4ljL0AoXCL0ukOOzl4tW1RqQ37uPr-ttHbOJuf6ZAjdTTPcX6ajsfRoKSUoAMKZsM-rOolp8cDTf9PLgahRae1GkglVpXLqZSM3iw57G1-MgLMKX2zpm_I15zSN0CMXJlC2jhj_s_5FehlHPcjxfmRuL-dNADQd0Gr1R-wIJSL</recordid><startdate>20170601</startdate><enddate>20170601</enddate><creator>张坤勇;Frederick Nai Charkley</creator><general>Central South University</general><general>Springer Nature B.V</general><general>Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Nanjing 210098, China</general><general>Geotechnical Research Institute, Hohai University, Nanjing 210098, China</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope></search><sort><creationdate>20170601</creationdate><title>An anisotropic constitutive model of geomaterials based on true triaxial testing and its application</title><author>张坤勇;Frederick Nai Charkley</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-f0fb3fb341b5fcecf12f21be78c6de58ce58a7520b81013e4e2c76e629f345e33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Anisotropy</topic><topic>Coarse-grained soils</topic><topic>complex</topic><topic>Computer simulation</topic><topic>constitutive</topic><topic>Constitutive models</topic><topic>Dam construction</topic><topic>Earth core</topic><topic>element</topic><topic>Engineering</topic><topic>FEM</topic><topic>finite</topic><topic>Finite element method</topic><topic>Geomaterials</topic><topic>Hydraulic fracturing</topic><topic>induced</topic><topic>Loads (forces)</topic><topic>Mathematical models</topic><topic>Metallic Materials</topic><topic>method</topic><topic>Modulus of elasticity</topic><topic>Numerical analysis</topic><topic>Poisson's ratio</topic><topic>Rocks</topic><topic>Soil structure</topic><topic>state</topic><topic>Strain</topic><topic>stress</topic><topic>Stresses</topic><topic>test</topic><topic>Test equipment</topic><topic>triaxial</topic><topic>Triaxial tests</topic><topic>true</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>张坤勇;Frederick Nai Charkley</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>CrossRef</collection><collection>Wanfang Data Journals - Hong Kong</collection><collection>WANFANG Data Centre</collection><collection>Wanfang Data Journals</collection><collection>万方数据期刊 - 香港版</collection><collection>China Online Journals (COJ)</collection><collection>China Online Journals (COJ)</collection><jtitle>Journal of Central South University</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>张坤勇;Frederick Nai Charkley</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>An anisotropic constitutive model of geomaterials based on true triaxial testing and its application</atitle><jtitle>Journal of Central South University</jtitle><stitle>J. Cent. South Univ</stitle><addtitle>Journal of Central South University of Technology</addtitle><date>2017-06-01</date><risdate>2017</risdate><volume>24</volume><issue>6</issue><spage>1430</spage><epage>1442</epage><pages>1430-1442</pages><issn>2095-2899</issn><eissn>2227-5223</eissn><abstract>Series of testing on coarse grained soils were carried out with a true triaxial testing apparatus. The loads were applied from the major principal and minor principal directions, respectively, to simulate the construction and water impounding process of a rock fill dam. The stress and strain relationships induced by the different loading methods were investigated. A remarkable stress-induced anisotropy under complex stress state was observed. Contrary to popular assumptions in traditional numerical analysis and constitutive models, it was found that different elastic modulus and Poisson ratio exist in different principal directions in rock fill dams. From the testing results, an anisotropic constitutive model based on Duncan-Chang nonlinear model is presented to overcome the limitations of axi-symmetric assumptions in conventional triaxial experiments and constitutive models. Both models were then applied in FEM analysis of an under-construction earth core high rock soil filled dam with the focus on hydraulic fracturing. The study reveals the major biases that exist when numerical analysis and constitutive models do not give serious consideration to the intermediate principal stress and anisotropy effects in soil rock built structures.</abstract><cop>Changsha</cop><pub>Central South University</pub><doi>10.1007/s11771-017-3547-0</doi><tpages>13</tpages></addata></record> |
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| source | Springer Nature - Complete Springer Journals; Alma/SFX Local Collection |
| subjects | Anisotropy Coarse-grained soils complex Computer simulation constitutive Constitutive models Dam construction Earth core element Engineering FEM finite Finite element method Geomaterials Hydraulic fracturing induced Loads (forces) Mathematical models Metallic Materials method Modulus of elasticity Numerical analysis Poisson's ratio Rocks Soil structure state Strain stress Stresses test Test equipment triaxial Triaxial tests true |
| title | An anisotropic constitutive model of geomaterials based on true triaxial testing and its application |
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