Numerical modelling of heat shock‐assisted rock fracture
Summary This paper presents a numerical investigation on the effects of thermal shock as a pretreatment of rock prior to comminution. More specifically, the effect of heat shock‐induced cracks on the uniaxial compressive strength of rock is numerically studied. The chosen constitutive model of rock...
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| Veröffentlicht in: | International journal for numerical and analytical methods in geomechanics 2020-01, Vol.44 (1), p.40-68 |
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| container_title | International journal for numerical and analytical methods in geomechanics |
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| creator | Pressacco, Martina Saksala, Timo |
| description | Summary
This paper presents a numerical investigation on the effects of thermal shock as a pretreatment of rock prior to comminution. More specifically, the effect of heat shock‐induced cracks on the uniaxial compressive strength of rock is numerically studied. The chosen constitutive model of rock employs a (strong) embedded discontinuity finite element formulation to describe cracks. The thermomechanical problem that governs the heat shock pretreatment of rocks is considered as an uncoupled problem because of a highly dominating role of the external heat influx. Two solution methods of the global problem are presented: an explicit‐explicit dynamic scheme and an implicit‐implicit quasi‐static scheme. The model performance is tested in simulations on heterogeneous numerical rock samples subjected first to a heat shock pretreatment and then to a mechanical compression test. According to the results, the compressive strength of intact granite rock having the axial splitting failure mode can be substantially reduced by heat shock pretreatment. |
| doi_str_mv | 10.1002/nag.3004 |
| format | Article |
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This paper presents a numerical investigation on the effects of thermal shock as a pretreatment of rock prior to comminution. More specifically, the effect of heat shock‐induced cracks on the uniaxial compressive strength of rock is numerically studied. The chosen constitutive model of rock employs a (strong) embedded discontinuity finite element formulation to describe cracks. The thermomechanical problem that governs the heat shock pretreatment of rocks is considered as an uncoupled problem because of a highly dominating role of the external heat influx. Two solution methods of the global problem are presented: an explicit‐explicit dynamic scheme and an implicit‐implicit quasi‐static scheme. The model performance is tested in simulations on heterogeneous numerical rock samples subjected first to a heat shock pretreatment and then to a mechanical compression test. According to the results, the compressive strength of intact granite rock having the axial splitting failure mode can be substantially reduced by heat shock pretreatment.</description><identifier>ISSN: 0363-9061</identifier><identifier>EISSN: 1096-9853</identifier><identifier>DOI: 10.1002/nag.3004</identifier><language>eng</language><publisher>Bognor Regis: Wiley Subscription Services, Inc</publisher><subject>Comminution ; Compression ; Compression tests ; Compressive strength ; Computer simulation ; Constitutive models ; Cracks ; embedded discontinuity ; Failure modes ; finite element method ; Fracture mechanics ; Heat shock ; Mathematical models ; Model testing ; Pretreatment ; rock fracture ; Rocks ; Sediment samples ; simulation ; Thermal shock ; thermal shock pretreatment</subject><ispartof>International journal for numerical and analytical methods in geomechanics, 2020-01, Vol.44 (1), p.40-68</ispartof><rights>2019 John Wiley & Sons, Ltd.</rights><rights>2020 John Wiley & Sons, Ltd.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2934-fae599b4fdf7da5a8b143ca3e5c61a7a3b09bd90bebe9f3d0729b8d203c247b73</citedby><cites>FETCH-LOGICAL-c2934-fae599b4fdf7da5a8b143ca3e5c61a7a3b09bd90bebe9f3d0729b8d203c247b73</cites><orcidid>0000-0002-2307-9239 ; 0000-0002-6159-3458</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fnag.3004$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fnag.3004$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27903,27904,45553,45554</link.rule.ids></links><search><creatorcontrib>Pressacco, Martina</creatorcontrib><creatorcontrib>Saksala, Timo</creatorcontrib><title>Numerical modelling of heat shock‐assisted rock fracture</title><title>International journal for numerical and analytical methods in geomechanics</title><description>Summary
This paper presents a numerical investigation on the effects of thermal shock as a pretreatment of rock prior to comminution. More specifically, the effect of heat shock‐induced cracks on the uniaxial compressive strength of rock is numerically studied. The chosen constitutive model of rock employs a (strong) embedded discontinuity finite element formulation to describe cracks. The thermomechanical problem that governs the heat shock pretreatment of rocks is considered as an uncoupled problem because of a highly dominating role of the external heat influx. Two solution methods of the global problem are presented: an explicit‐explicit dynamic scheme and an implicit‐implicit quasi‐static scheme. The model performance is tested in simulations on heterogeneous numerical rock samples subjected first to a heat shock pretreatment and then to a mechanical compression test. According to the results, the compressive strength of intact granite rock having the axial splitting failure mode can be substantially reduced by heat shock pretreatment.</description><subject>Comminution</subject><subject>Compression</subject><subject>Compression tests</subject><subject>Compressive strength</subject><subject>Computer simulation</subject><subject>Constitutive models</subject><subject>Cracks</subject><subject>embedded discontinuity</subject><subject>Failure modes</subject><subject>finite element method</subject><subject>Fracture mechanics</subject><subject>Heat shock</subject><subject>Mathematical models</subject><subject>Model testing</subject><subject>Pretreatment</subject><subject>rock fracture</subject><subject>Rocks</subject><subject>Sediment samples</subject><subject>simulation</subject><subject>Thermal shock</subject><subject>thermal shock pretreatment</subject><issn>0363-9061</issn><issn>1096-9853</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp10M1Kw0AQB_BFFKxV8BECXrykzu7ma72VYqtQ6kXPy37MtqlpUncTpDcfwWf0SUyNV0_DMD_-A39CrilMKAC7q9V6wgGSEzKiILJYFCk_JSPgGY8FZPScXISwBYC0v47I_arboS-NqqJdY7GqynodNS7aoGqjsGnM2_fnlwqhDC3ayPd75Lwybefxkpw5VQW8-ptj8jp_eJk9xsvnxdNsuowNEzyJncJUCJ0463KrUlVomnCjOKYmoypXXIPQVoBGjcJxCzkTurAMuGFJrnM-JjdD7t437x2GVm6bztf9S8k4K1iSAWe9uh2U8U0IHp3c-3Kn_EFSkMdmZN-MPDbT03igH2WFh3-dXE0Xv_4H8PdlRA</recordid><startdate>202001</startdate><enddate>202001</enddate><creator>Pressacco, Martina</creator><creator>Saksala, Timo</creator><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SC</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H96</scope><scope>JQ2</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><orcidid>https://orcid.org/0000-0002-2307-9239</orcidid><orcidid>https://orcid.org/0000-0002-6159-3458</orcidid></search><sort><creationdate>202001</creationdate><title>Numerical modelling of heat shock‐assisted rock fracture</title><author>Pressacco, Martina ; Saksala, Timo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2934-fae599b4fdf7da5a8b143ca3e5c61a7a3b09bd90bebe9f3d0729b8d203c247b73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Comminution</topic><topic>Compression</topic><topic>Compression tests</topic><topic>Compressive strength</topic><topic>Computer simulation</topic><topic>Constitutive models</topic><topic>Cracks</topic><topic>embedded discontinuity</topic><topic>Failure modes</topic><topic>finite element method</topic><topic>Fracture mechanics</topic><topic>Heat shock</topic><topic>Mathematical models</topic><topic>Model testing</topic><topic>Pretreatment</topic><topic>rock fracture</topic><topic>Rocks</topic><topic>Sediment samples</topic><topic>simulation</topic><topic>Thermal shock</topic><topic>thermal shock pretreatment</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pressacco, Martina</creatorcontrib><creatorcontrib>Saksala, Timo</creatorcontrib><collection>CrossRef</collection><collection>Computer and Information Systems Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>ProQuest Computer Science Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><jtitle>International journal for numerical and analytical methods in geomechanics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pressacco, Martina</au><au>Saksala, Timo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Numerical modelling of heat shock‐assisted rock fracture</atitle><jtitle>International journal for numerical and analytical methods in geomechanics</jtitle><date>2020-01</date><risdate>2020</risdate><volume>44</volume><issue>1</issue><spage>40</spage><epage>68</epage><pages>40-68</pages><issn>0363-9061</issn><eissn>1096-9853</eissn><abstract>Summary
This paper presents a numerical investigation on the effects of thermal shock as a pretreatment of rock prior to comminution. More specifically, the effect of heat shock‐induced cracks on the uniaxial compressive strength of rock is numerically studied. The chosen constitutive model of rock employs a (strong) embedded discontinuity finite element formulation to describe cracks. The thermomechanical problem that governs the heat shock pretreatment of rocks is considered as an uncoupled problem because of a highly dominating role of the external heat influx. Two solution methods of the global problem are presented: an explicit‐explicit dynamic scheme and an implicit‐implicit quasi‐static scheme. The model performance is tested in simulations on heterogeneous numerical rock samples subjected first to a heat shock pretreatment and then to a mechanical compression test. According to the results, the compressive strength of intact granite rock having the axial splitting failure mode can be substantially reduced by heat shock pretreatment.</abstract><cop>Bognor Regis</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/nag.3004</doi><tpages>29</tpages><orcidid>https://orcid.org/0000-0002-2307-9239</orcidid><orcidid>https://orcid.org/0000-0002-6159-3458</orcidid></addata></record> |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Comminution Compression Compression tests Compressive strength Computer simulation Constitutive models Cracks embedded discontinuity Failure modes finite element method Fracture mechanics Heat shock Mathematical models Model testing Pretreatment rock fracture Rocks Sediment samples simulation Thermal shock thermal shock pretreatment |
| title | Numerical modelling of heat shock‐assisted rock fracture |
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