A J-integral approach using digital image correlation for evaluating stress intensity factors in fatigue cracks with closure effects
•Simple J-integral approach for evaluating SIFs using experimental DIC data.•Results highlight the non-linearities introduced by the crack closure phase.•SIF measurements on the presence of crack tip plasticity and blunting. Digital image correlation (DIC) techniques are used to obtain the stress in...
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| Veröffentlicht in: | Theoretical and applied fracture mechanics 2017-08, Vol.90, p.14-21 |
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| container_title | Theoretical and applied fracture mechanics |
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| creator | Gonzáles, Giancarlo L.G. González, Julián A.O. Castro, Jaime T.P. Freire, José L.F. |
| description | •Simple J-integral approach for evaluating SIFs using experimental DIC data.•Results highlight the non-linearities introduced by the crack closure phase.•SIF measurements on the presence of crack tip plasticity and blunting.
Digital image correlation (DIC) techniques are used to obtain the stress intensity factor (SIF) via experimental J-integral evaluations in an AISI 4340 steel disk-shaped compact-tension (DC(T)) specimen subjected to mode I loading conditions. The combined analytical and experimental methodology is based on the computation of the J-integral over an arbitrary but elastic contour path enclosing the crack tip. The DIC displacement field around the crack is used to directly determine the displacement gradients, the stress components, and the total strain energy for points along the selected path employing stress-strain linear elastic relations. The proposed analytical-experimental hybrid approach is then applied to investigate the influence of crack closure on SIF measurements under constant amplitude loading conditions, after and before the application of overloads. The effects of the closure-induced nonlinearities observed in the experimental results are analyzed and discussed. |
| doi_str_mv | 10.1016/j.tafmec.2017.02.008 |
| format | Article |
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Digital image correlation (DIC) techniques are used to obtain the stress intensity factor (SIF) via experimental J-integral evaluations in an AISI 4340 steel disk-shaped compact-tension (DC(T)) specimen subjected to mode I loading conditions. The combined analytical and experimental methodology is based on the computation of the J-integral over an arbitrary but elastic contour path enclosing the crack tip. The DIC displacement field around the crack is used to directly determine the displacement gradients, the stress components, and the total strain energy for points along the selected path employing stress-strain linear elastic relations. The proposed analytical-experimental hybrid approach is then applied to investigate the influence of crack closure on SIF measurements under constant amplitude loading conditions, after and before the application of overloads. The effects of the closure-induced nonlinearities observed in the experimental results are analyzed and discussed.</description><identifier>ISSN: 0167-8442</identifier><identifier>EISSN: 1872-7638</identifier><identifier>DOI: 10.1016/j.tafmec.2017.02.008</identifier><language>eng</language><publisher>Amsterdam: Elsevier Ltd</publisher><subject>Crack closure ; Crack propagation ; Digital image correlation ; Digital imaging ; Effects ; Fatigue cracks ; Fatigue failure ; Fracture mechanics ; High strength low alloy steels ; J integral ; Steel ; Strain ; Stress intensity factor ; Stress intensity factors ; Stress-strain curves</subject><ispartof>Theoretical and applied fracture mechanics, 2017-08, Vol.90, p.14-21</ispartof><rights>2017 Elsevier Ltd</rights><rights>Copyright Elsevier BV Aug 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c334t-9777cfce7f02c343b17093b9155a666625c0111455331e2fb96886ad4a3d69e73</citedby><cites>FETCH-LOGICAL-c334t-9777cfce7f02c343b17093b9155a666625c0111455331e2fb96886ad4a3d69e73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0167844216302464$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Gonzáles, Giancarlo L.G.</creatorcontrib><creatorcontrib>González, Julián A.O.</creatorcontrib><creatorcontrib>Castro, Jaime T.P.</creatorcontrib><creatorcontrib>Freire, José L.F.</creatorcontrib><title>A J-integral approach using digital image correlation for evaluating stress intensity factors in fatigue cracks with closure effects</title><title>Theoretical and applied fracture mechanics</title><description>•Simple J-integral approach for evaluating SIFs using experimental DIC data.•Results highlight the non-linearities introduced by the crack closure phase.•SIF measurements on the presence of crack tip plasticity and blunting.
Digital image correlation (DIC) techniques are used to obtain the stress intensity factor (SIF) via experimental J-integral evaluations in an AISI 4340 steel disk-shaped compact-tension (DC(T)) specimen subjected to mode I loading conditions. The combined analytical and experimental methodology is based on the computation of the J-integral over an arbitrary but elastic contour path enclosing the crack tip. The DIC displacement field around the crack is used to directly determine the displacement gradients, the stress components, and the total strain energy for points along the selected path employing stress-strain linear elastic relations. The proposed analytical-experimental hybrid approach is then applied to investigate the influence of crack closure on SIF measurements under constant amplitude loading conditions, after and before the application of overloads. The effects of the closure-induced nonlinearities observed in the experimental results are analyzed and discussed.</description><subject>Crack closure</subject><subject>Crack propagation</subject><subject>Digital image correlation</subject><subject>Digital imaging</subject><subject>Effects</subject><subject>Fatigue cracks</subject><subject>Fatigue failure</subject><subject>Fracture mechanics</subject><subject>High strength low alloy steels</subject><subject>J integral</subject><subject>Steel</subject><subject>Strain</subject><subject>Stress intensity factor</subject><subject>Stress intensity factors</subject><subject>Stress-strain curves</subject><issn>0167-8442</issn><issn>1872-7638</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLxDAUhYMoOI7-AxcB161J0zbtRhDxyYAbXYdMelNTazMmqTJ7f7h3GNdmkcflnBPOR8g5ZzlnvL4c8qTtB5i8YFzmrMgZaw7IgjeyyGQtmkOyQJnMmrIsjslJjANDIW_Fgvxc06fMTQn6oEeqN5vgtXmjc3RTTzvXu4Rj96F7oMaHAKNOzk_U-kDhS48zPlEYU4AY6S5nii5tqdUm-bCb4DW5fkZ70OY90m-X3qgZfZwDULAWTIqn5MjqMcLZ37kkr3e3LzcP2er5_vHmepUZIcqUtVJKYw1IywojSrHmkrVi3fKq0jWuojKMc15WlRAcCrtu66apdVdq0dUtSLEkF_tcbPk5Q0xq8HOY8EvFWzTVrMF9Scq9ygQfYwCrNgEJhK3iTO14q0Hteasdb8UKhbzRdrW3ATb4chBUNA4mA50LWFJ13v0f8AvQ8oyP</recordid><startdate>201708</startdate><enddate>201708</enddate><creator>Gonzáles, Giancarlo L.G.</creator><creator>González, Julián A.O.</creator><creator>Castro, Jaime T.P.</creator><creator>Freire, José L.F.</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>201708</creationdate><title>A J-integral approach using digital image correlation for evaluating stress intensity factors in fatigue cracks with closure effects</title><author>Gonzáles, Giancarlo L.G. ; González, Julián A.O. ; Castro, Jaime T.P. ; Freire, José L.F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-9777cfce7f02c343b17093b9155a666625c0111455331e2fb96886ad4a3d69e73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Crack closure</topic><topic>Crack propagation</topic><topic>Digital image correlation</topic><topic>Digital imaging</topic><topic>Effects</topic><topic>Fatigue cracks</topic><topic>Fatigue failure</topic><topic>Fracture mechanics</topic><topic>High strength low alloy steels</topic><topic>J integral</topic><topic>Steel</topic><topic>Strain</topic><topic>Stress intensity factor</topic><topic>Stress intensity factors</topic><topic>Stress-strain curves</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gonzáles, Giancarlo L.G.</creatorcontrib><creatorcontrib>González, Julián A.O.</creatorcontrib><creatorcontrib>Castro, Jaime T.P.</creatorcontrib><creatorcontrib>Freire, José L.F.</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>Theoretical and applied fracture mechanics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gonzáles, Giancarlo L.G.</au><au>González, Julián A.O.</au><au>Castro, Jaime T.P.</au><au>Freire, José L.F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A J-integral approach using digital image correlation for evaluating stress intensity factors in fatigue cracks with closure effects</atitle><jtitle>Theoretical and applied fracture mechanics</jtitle><date>2017-08</date><risdate>2017</risdate><volume>90</volume><spage>14</spage><epage>21</epage><pages>14-21</pages><issn>0167-8442</issn><eissn>1872-7638</eissn><abstract>•Simple J-integral approach for evaluating SIFs using experimental DIC data.•Results highlight the non-linearities introduced by the crack closure phase.•SIF measurements on the presence of crack tip plasticity and blunting.
Digital image correlation (DIC) techniques are used to obtain the stress intensity factor (SIF) via experimental J-integral evaluations in an AISI 4340 steel disk-shaped compact-tension (DC(T)) specimen subjected to mode I loading conditions. The combined analytical and experimental methodology is based on the computation of the J-integral over an arbitrary but elastic contour path enclosing the crack tip. The DIC displacement field around the crack is used to directly determine the displacement gradients, the stress components, and the total strain energy for points along the selected path employing stress-strain linear elastic relations. The proposed analytical-experimental hybrid approach is then applied to investigate the influence of crack closure on SIF measurements under constant amplitude loading conditions, after and before the application of overloads. The effects of the closure-induced nonlinearities observed in the experimental results are analyzed and discussed.</abstract><cop>Amsterdam</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.tafmec.2017.02.008</doi><tpages>8</tpages></addata></record> |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Crack closure Crack propagation Digital image correlation Digital imaging Effects Fatigue cracks Fatigue failure Fracture mechanics High strength low alloy steels J integral Steel Strain Stress intensity factor Stress intensity factors Stress-strain curves |
| title | A J-integral approach using digital image correlation for evaluating stress intensity factors in fatigue cracks with closure effects |
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