Investigating creep rupture and damage behaviour in notched P92 steel specimen using a microscale modelling approach
ABSTRACT Idealized random grains separated by pseudo grain boundaries were generated by using Voronoi tessellation to simulate the polycrystalline microstructure. Combined with finite element analyses, this approach made it possible to addressing crack initiation and progressive failure due to crack...
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| Veröffentlicht in: | Fatigue & fracture of engineering materials & structures 2018-02, Vol.41 (2), p.456-472 |
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| container_title | Fatigue & fracture of engineering materials & structures |
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| creator | Zhao, L. Alang, N. Nikbin, K. |
| description | ABSTRACT
Idealized random grains separated by pseudo grain boundaries were generated by using Voronoi tessellation to simulate the polycrystalline microstructure. Combined with finite element analyses, this approach made it possible to addressing crack initiation and progressive failure due to crack growth in notched bar geometries of P92 steel at high temperature. The calculations provided good predictions for creep rupture lives of notched specimen with different notch radii and external stress. Simultaneously, irregular crack growth shape, intergranular crack mode, and wedge cracks at triple grain interaction were captured in the model. The crack initiation positions were found to be influenced by notch radius and applied stress causing high stress triaxiality at the subgrain level. Furthermore, the preferential crack growth directions were changed as the notch varied from sharp to blunt. |
| doi_str_mv | 10.1111/ffe.12713 |
| format | Article |
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Idealized random grains separated by pseudo grain boundaries were generated by using Voronoi tessellation to simulate the polycrystalline microstructure. Combined with finite element analyses, this approach made it possible to addressing crack initiation and progressive failure due to crack growth in notched bar geometries of P92 steel at high temperature. The calculations provided good predictions for creep rupture lives of notched specimen with different notch radii and external stress. Simultaneously, irregular crack growth shape, intergranular crack mode, and wedge cracks at triple grain interaction were captured in the model. The crack initiation positions were found to be influenced by notch radius and applied stress causing high stress triaxiality at the subgrain level. Furthermore, the preferential crack growth directions were changed as the notch varied from sharp to blunt.</description><identifier>ISSN: 8756-758X</identifier><identifier>EISSN: 1460-2695</identifier><identifier>DOI: 10.1111/ffe.12713</identifier><language>eng</language><publisher>Oxford: Wiley Subscription Services, Inc</publisher><subject>Axial stress ; Computer simulation ; Crack initiation ; Crack propagation ; creep fracture ; Finite element method ; Fracture mechanics ; Grain boundaries ; Heat resistant steels ; microscale modelling ; notched specimen ; Rupturing ; strain rate dependent ; Tessellation ; Voronoi tessellation</subject><ispartof>Fatigue & fracture of engineering materials & structures, 2018-02, Vol.41 (2), p.456-472</ispartof><rights>2017 Wiley Publishing Ltd.</rights><rights>2018 John Wiley & Sons Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2973-f74cfcc4d84d4c91021f4ef33d87fba4c38b63483f934d9a7c18b057100e77613</citedby><cites>FETCH-LOGICAL-c2973-f74cfcc4d84d4c91021f4ef33d87fba4c38b63483f934d9a7c18b057100e77613</cites><orcidid>0000-0002-1787-0876</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fffe.12713$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fffe.12713$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>315,782,786,1419,27933,27934,45583,45584</link.rule.ids></links><search><creatorcontrib>Zhao, L.</creatorcontrib><creatorcontrib>Alang, N.</creatorcontrib><creatorcontrib>Nikbin, K.</creatorcontrib><title>Investigating creep rupture and damage behaviour in notched P92 steel specimen using a microscale modelling approach</title><title>Fatigue & fracture of engineering materials & structures</title><description>ABSTRACT
Idealized random grains separated by pseudo grain boundaries were generated by using Voronoi tessellation to simulate the polycrystalline microstructure. Combined with finite element analyses, this approach made it possible to addressing crack initiation and progressive failure due to crack growth in notched bar geometries of P92 steel at high temperature. The calculations provided good predictions for creep rupture lives of notched specimen with different notch radii and external stress. Simultaneously, irregular crack growth shape, intergranular crack mode, and wedge cracks at triple grain interaction were captured in the model. The crack initiation positions were found to be influenced by notch radius and applied stress causing high stress triaxiality at the subgrain level. Furthermore, the preferential crack growth directions were changed as the notch varied from sharp to blunt.</description><subject>Axial stress</subject><subject>Computer simulation</subject><subject>Crack initiation</subject><subject>Crack propagation</subject><subject>creep fracture</subject><subject>Finite element method</subject><subject>Fracture mechanics</subject><subject>Grain boundaries</subject><subject>Heat resistant steels</subject><subject>microscale modelling</subject><subject>notched specimen</subject><subject>Rupturing</subject><subject>strain rate dependent</subject><subject>Tessellation</subject><subject>Voronoi tessellation</subject><issn>8756-758X</issn><issn>1460-2695</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp1kD9PwzAQxS0EEqUw8A0sMTGktWMndkZUtVCpEgwgsVmOfW5T5R92Auq3J2lYueWk0-_e3XsI3VOyoEMtnYMFjQVlF2hGeUqiOM2SSzSTIkkjkcjPa3QTwpEQmnLGZqjb1t8QumKvu6LeY-MBWuz7tus9YF1bbHWl94BzOOjvouk9LmpcN505gMVvWYxDB1Di0IIpKqhxH0YZjavC-CYYXQKuGgtleR63rW-0OdyiK6fLAHd_fY4-Nuv31Uu0e33erp52kYkzwSInuHHGcCu55SajJKaOg2PMSuFyzQ2Tecq4ZC5j3GZaGCpzkghKCAiRUjZHD5PucParH2yq4-CgHk4qmkkmZSbJSD1O1Phx8OBU64tK-5OiRI2hqiFUdQ51YJcT-1OUcPofVJvNetr4BateeaE</recordid><startdate>201802</startdate><enddate>201802</enddate><creator>Zhao, L.</creator><creator>Alang, N.</creator><creator>Nikbin, K.</creator><general>Wiley Subscription Services, Inc</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><orcidid>https://orcid.org/0000-0002-1787-0876</orcidid></search><sort><creationdate>201802</creationdate><title>Investigating creep rupture and damage behaviour in notched P92 steel specimen using a microscale modelling approach</title><author>Zhao, L. ; Alang, N. ; Nikbin, K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2973-f74cfcc4d84d4c91021f4ef33d87fba4c38b63483f934d9a7c18b057100e77613</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Axial stress</topic><topic>Computer simulation</topic><topic>Crack initiation</topic><topic>Crack propagation</topic><topic>creep fracture</topic><topic>Finite element method</topic><topic>Fracture mechanics</topic><topic>Grain boundaries</topic><topic>Heat resistant steels</topic><topic>microscale modelling</topic><topic>notched specimen</topic><topic>Rupturing</topic><topic>strain rate dependent</topic><topic>Tessellation</topic><topic>Voronoi tessellation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhao, L.</creatorcontrib><creatorcontrib>Alang, N.</creatorcontrib><creatorcontrib>Nikbin, K.</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>Fatigue & fracture of engineering materials & structures</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhao, L.</au><au>Alang, N.</au><au>Nikbin, K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Investigating creep rupture and damage behaviour in notched P92 steel specimen using a microscale modelling approach</atitle><jtitle>Fatigue & fracture of engineering materials & structures</jtitle><date>2018-02</date><risdate>2018</risdate><volume>41</volume><issue>2</issue><spage>456</spage><epage>472</epage><pages>456-472</pages><issn>8756-758X</issn><eissn>1460-2695</eissn><abstract>ABSTRACT
Idealized random grains separated by pseudo grain boundaries were generated by using Voronoi tessellation to simulate the polycrystalline microstructure. Combined with finite element analyses, this approach made it possible to addressing crack initiation and progressive failure due to crack growth in notched bar geometries of P92 steel at high temperature. The calculations provided good predictions for creep rupture lives of notched specimen with different notch radii and external stress. Simultaneously, irregular crack growth shape, intergranular crack mode, and wedge cracks at triple grain interaction were captured in the model. The crack initiation positions were found to be influenced by notch radius and applied stress causing high stress triaxiality at the subgrain level. Furthermore, the preferential crack growth directions were changed as the notch varied from sharp to blunt.</abstract><cop>Oxford</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1111/ffe.12713</doi><tpages>17</tpages><orcidid>https://orcid.org/0000-0002-1787-0876</orcidid></addata></record> |
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| subjects | Axial stress Computer simulation Crack initiation Crack propagation creep fracture Finite element method Fracture mechanics Grain boundaries Heat resistant steels microscale modelling notched specimen Rupturing strain rate dependent Tessellation Voronoi tessellation |
| title | Investigating creep rupture and damage behaviour in notched P92 steel specimen using a microscale modelling approach |
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