A phase-transformation based method coupled with entropy to predict fatigue crack initiation of metallic materials
•A new phase transformation model is proposed to predict fatigue crack initiation.•Evolution of damage under fatigue loading is considered with the entropy theory.•Effects of grain size on the crack initiation is investigated. Fatigue crack initiation can be regarded as a generalized phase transform...
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| Veröffentlicht in: | Engineering fracture mechanics 2021-06, Vol.250, p.107757, Article 107757 |
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| container_title | Engineering fracture mechanics |
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| creator | Lei, Mingqi Wang, Jundong Yao, Yao |
| description | •A new phase transformation model is proposed to predict fatigue crack initiation.•Evolution of damage under fatigue loading is considered with the entropy theory.•Effects of grain size on the crack initiation is investigated.
Fatigue crack initiation can be regarded as a generalized phase transformation from the view of breaking energy barrier. A new phase transformation model is proposed to predict fatigue crack initiation based on the second law of thermodynamics. Evolution of dynamic energy during crack initiation and the damage under fatigue loading is considered combining with the entropy theory. The system becomes unstable when the Helmholtz free energy reaches the extremum value, which is adopted to represent fatigue crack initiation. The effects of grain size on the crack initiation and the asymptote of S-shaped S-N curve are discussed. The theoretical predictions are compared with the experimental data and show reasonable accuracy for different metallic materials. |
| doi_str_mv | 10.1016/j.engfracmech.2021.107757 |
| format | Article |
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Fatigue crack initiation can be regarded as a generalized phase transformation from the view of breaking energy barrier. A new phase transformation model is proposed to predict fatigue crack initiation based on the second law of thermodynamics. Evolution of dynamic energy during crack initiation and the damage under fatigue loading is considered combining with the entropy theory. The system becomes unstable when the Helmholtz free energy reaches the extremum value, which is adopted to represent fatigue crack initiation. The effects of grain size on the crack initiation and the asymptote of S-shaped S-N curve are discussed. The theoretical predictions are compared with the experimental data and show reasonable accuracy for different metallic materials.</description><identifier>ISSN: 0013-7944</identifier><identifier>EISSN: 1873-7315</identifier><identifier>DOI: 10.1016/j.engfracmech.2021.107757</identifier><language>eng</language><publisher>New York: Elsevier Ltd</publisher><subject>Asymptotes ; Crack initiation ; Crack propagation ; Energy ; Entropy ; Extremum values ; Fatigue ; Fatigue failure ; Fatigue life ; Fracture mechanics ; Free energy ; Grain size ; Phase transformation ; Phase transitions ; S N diagrams ; Thermodynamics</subject><ispartof>Engineering fracture mechanics, 2021-06, Vol.250, p.107757, Article 107757</ispartof><rights>2021 Elsevier Ltd</rights><rights>Copyright Elsevier BV Jun 1, 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c349t-820519268ee94efe1c22e513c01a8755fd7a79f8dc8bef5634bdd5cf252248343</citedby><cites>FETCH-LOGICAL-c349t-820519268ee94efe1c22e513c01a8755fd7a79f8dc8bef5634bdd5cf252248343</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.engfracmech.2021.107757$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,778,782,3539,27907,27908,45978</link.rule.ids></links><search><creatorcontrib>Lei, Mingqi</creatorcontrib><creatorcontrib>Wang, Jundong</creatorcontrib><creatorcontrib>Yao, Yao</creatorcontrib><title>A phase-transformation based method coupled with entropy to predict fatigue crack initiation of metallic materials</title><title>Engineering fracture mechanics</title><description>•A new phase transformation model is proposed to predict fatigue crack initiation.•Evolution of damage under fatigue loading is considered with the entropy theory.•Effects of grain size on the crack initiation is investigated.
Fatigue crack initiation can be regarded as a generalized phase transformation from the view of breaking energy barrier. A new phase transformation model is proposed to predict fatigue crack initiation based on the second law of thermodynamics. Evolution of dynamic energy during crack initiation and the damage under fatigue loading is considered combining with the entropy theory. The system becomes unstable when the Helmholtz free energy reaches the extremum value, which is adopted to represent fatigue crack initiation. The effects of grain size on the crack initiation and the asymptote of S-shaped S-N curve are discussed. The theoretical predictions are compared with the experimental data and show reasonable accuracy for different metallic materials.</description><subject>Asymptotes</subject><subject>Crack initiation</subject><subject>Crack propagation</subject><subject>Energy</subject><subject>Entropy</subject><subject>Extremum values</subject><subject>Fatigue</subject><subject>Fatigue failure</subject><subject>Fatigue life</subject><subject>Fracture mechanics</subject><subject>Free energy</subject><subject>Grain size</subject><subject>Phase transformation</subject><subject>Phase transitions</subject><subject>S N diagrams</subject><subject>Thermodynamics</subject><issn>0013-7944</issn><issn>1873-7315</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqNkE1PxCAQhonRxHX1P2A8dwVaSnvcbPxKNvGiZ8LSYUttSwVWs_9eNvXg0dPAZN5n4EHolpIVJbS871Yw7o1XegDdrhhhNPWF4OIMLWgl8kzklJ-jBSE0neuiuERXIXSEEFFWZIH8Gk-tCpBFr8ZgnB9UtG7Eu9Rr8ACxdQ3W7jD16fptY4thjN5NRxwdnjw0VkdsUmZ_AKzTOz6wHW20M8WZE0L1vdU4gcFb1YdrdGFSgZvfukTvjw9vm-ds-_r0sllvM50XdcwqRjitWVkB1AUYoJox4DTXhKpKcG4aoURtqkZXOzC8zItd03BtGGesqPIiX6K7mTt593mAEGXnDn5MKyXjnPC8pIylqXqe0t6F4MHIydtB-aOkRJ4Uy07-USxPiuWsOGU3cxbSN74seBm0hVEnKx50lI2z_6D8AJmFjJ0</recordid><startdate>20210601</startdate><enddate>20210601</enddate><creator>Lei, Mingqi</creator><creator>Wang, Jundong</creator><creator>Yao, Yao</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7TB</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>20210601</creationdate><title>A phase-transformation based method coupled with entropy to predict fatigue crack initiation of metallic materials</title><author>Lei, Mingqi ; Wang, Jundong ; Yao, Yao</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c349t-820519268ee94efe1c22e513c01a8755fd7a79f8dc8bef5634bdd5cf252248343</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Asymptotes</topic><topic>Crack initiation</topic><topic>Crack propagation</topic><topic>Energy</topic><topic>Entropy</topic><topic>Extremum values</topic><topic>Fatigue</topic><topic>Fatigue failure</topic><topic>Fatigue life</topic><topic>Fracture mechanics</topic><topic>Free energy</topic><topic>Grain size</topic><topic>Phase transformation</topic><topic>Phase transitions</topic><topic>S N diagrams</topic><topic>Thermodynamics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lei, Mingqi</creatorcontrib><creatorcontrib>Wang, Jundong</creatorcontrib><creatorcontrib>Yao, Yao</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Engineering fracture mechanics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lei, Mingqi</au><au>Wang, Jundong</au><au>Yao, Yao</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A phase-transformation based method coupled with entropy to predict fatigue crack initiation of metallic materials</atitle><jtitle>Engineering fracture mechanics</jtitle><date>2021-06-01</date><risdate>2021</risdate><volume>250</volume><spage>107757</spage><pages>107757-</pages><artnum>107757</artnum><issn>0013-7944</issn><eissn>1873-7315</eissn><abstract>•A new phase transformation model is proposed to predict fatigue crack initiation.•Evolution of damage under fatigue loading is considered with the entropy theory.•Effects of grain size on the crack initiation is investigated.
Fatigue crack initiation can be regarded as a generalized phase transformation from the view of breaking energy barrier. A new phase transformation model is proposed to predict fatigue crack initiation based on the second law of thermodynamics. Evolution of dynamic energy during crack initiation and the damage under fatigue loading is considered combining with the entropy theory. The system becomes unstable when the Helmholtz free energy reaches the extremum value, which is adopted to represent fatigue crack initiation. The effects of grain size on the crack initiation and the asymptote of S-shaped S-N curve are discussed. The theoretical predictions are compared with the experimental data and show reasonable accuracy for different metallic materials.</abstract><cop>New York</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.engfracmech.2021.107757</doi></addata></record> |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete - AutoHoldings |
| subjects | Asymptotes Crack initiation Crack propagation Energy Entropy Extremum values Fatigue Fatigue failure Fatigue life Fracture mechanics Free energy Grain size Phase transformation Phase transitions S N diagrams Thermodynamics |
| title | A phase-transformation based method coupled with entropy to predict fatigue crack initiation of metallic materials |
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