Evaluation of overload effects on fatigue crack growth and closure
Fatigue crack propagation tests with single tensile peak overloads have been performed in 6082-T6 aluminium alloy at several baseline Δ K levels and stress ratios of 0.05 and 0.25. The tests were carried out at constant Δ K conditions. Crack closure was monitored in all tests by the compliance techn...
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| Veröffentlicht in: | Engineering fracture mechanics 2003-07, Vol.70 (11), p.1379-1397 |
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| creator | Borrego, L.P. Ferreira, J.M. Pinho da Cruz, J.M. Costa, J.M. |
| description | Fatigue crack propagation tests with single tensile peak overloads have been performed in 6082-T6 aluminium alloy at several baseline Δ
K levels and stress ratios of 0.05 and 0.25. The tests were carried out at constant Δ
K conditions. Crack closure was monitored in all tests by the compliance technique using a pin microgauge. The observed transient post-overload behaviour is discussed in terms of overload ratio, baseline Δ
K level and stress ratio. The crack closure parameter
U was obtained and compared with the crack growth transients. Experimental support is given for the hypothesis that plasticity-induced closure is the main cause of overload retardation for plane stress conditions. Predictions based on crack closure measurements show good correlation with the observed crack growth rates for all the post-overload transients when discontinuous closure is properly taken into account. |
| doi_str_mv | 10.1016/S0013-7944(02)00119-4 |
| format | Article |
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K levels and stress ratios of 0.05 and 0.25. The tests were carried out at constant Δ
K conditions. Crack closure was monitored in all tests by the compliance technique using a pin microgauge. The observed transient post-overload behaviour is discussed in terms of overload ratio, baseline Δ
K level and stress ratio. The crack closure parameter
U was obtained and compared with the crack growth transients. Experimental support is given for the hypothesis that plasticity-induced closure is the main cause of overload retardation for plane stress conditions. Predictions based on crack closure measurements show good correlation with the observed crack growth rates for all the post-overload transients when discontinuous closure is properly taken into account.</description><identifier>ISSN: 0013-7944</identifier><identifier>EISSN: 1873-7315</identifier><identifier>DOI: 10.1016/S0013-7944(02)00119-4</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Aluminium alloys ; Crack closure ; Discontinuous closure ; Overloads ; Partial closure model</subject><ispartof>Engineering fracture mechanics, 2003-07, Vol.70 (11), p.1379-1397</ispartof><rights>2002 Elsevier Science Ltd</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c451t-9d1af62dd2279179e5331ed559258c8d01edae000747fc8546bbd9230b191e3f3</citedby><cites>FETCH-LOGICAL-c451t-9d1af62dd2279179e5331ed559258c8d01edae000747fc8546bbd9230b191e3f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0013794402001194$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Borrego, L.P.</creatorcontrib><creatorcontrib>Ferreira, J.M.</creatorcontrib><creatorcontrib>Pinho da Cruz, J.M.</creatorcontrib><creatorcontrib>Costa, J.M.</creatorcontrib><title>Evaluation of overload effects on fatigue crack growth and closure</title><title>Engineering fracture mechanics</title><description>Fatigue crack propagation tests with single tensile peak overloads have been performed in 6082-T6 aluminium alloy at several baseline Δ
K levels and stress ratios of 0.05 and 0.25. The tests were carried out at constant Δ
K conditions. Crack closure was monitored in all tests by the compliance technique using a pin microgauge. The observed transient post-overload behaviour is discussed in terms of overload ratio, baseline Δ
K level and stress ratio. The crack closure parameter
U was obtained and compared with the crack growth transients. Experimental support is given for the hypothesis that plasticity-induced closure is the main cause of overload retardation for plane stress conditions. Predictions based on crack closure measurements show good correlation with the observed crack growth rates for all the post-overload transients when discontinuous closure is properly taken into account.</description><subject>Aluminium alloys</subject><subject>Crack closure</subject><subject>Discontinuous closure</subject><subject>Overloads</subject><subject>Partial closure model</subject><issn>0013-7944</issn><issn>1873-7315</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LAzEQhoMoWKs_QchJ9LCaz93NSbTUDyh4UM8hTSZ1dbupyW7Ff2_aildPw7zzzsvMg9ApJZeU0PLqmRDKi0oJcU7YRW6oKsQeGtG6yjKnch-N_iyH6Cild0JIVdZkhG6na9MOpm9Ch4PHYQ2xDcZh8B5sn3CWfZ4uBsA2GvuBFzF89W_YdA7bNqQhwjE68KZNcPJbx-j1bvoyeShmT_ePk5tZYYWkfaEcNb5kzjFWKVopkJxTcFIqJmtbO5IbA5vDROVtLUU5nzvFOJlTRYF7PkZnu9xVDJ8DpF4vm2ShbU0HYUia1aRigqtslDujjSGlCF6vYrM08VtTojfE9JaY3uDQhOktMS3y3vVuD_IX6waiTraBzoJrYoahXWj-SfgBdu1yKg</recordid><startdate>20030701</startdate><enddate>20030701</enddate><creator>Borrego, L.P.</creator><creator>Ferreira, J.M.</creator><creator>Pinho da Cruz, J.M.</creator><creator>Costa, J.M.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>20030701</creationdate><title>Evaluation of overload effects on fatigue crack growth and closure</title><author>Borrego, L.P. ; Ferreira, J.M. ; Pinho da Cruz, J.M. ; Costa, J.M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c451t-9d1af62dd2279179e5331ed559258c8d01edae000747fc8546bbd9230b191e3f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Aluminium alloys</topic><topic>Crack closure</topic><topic>Discontinuous closure</topic><topic>Overloads</topic><topic>Partial closure model</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Borrego, L.P.</creatorcontrib><creatorcontrib>Ferreira, J.M.</creatorcontrib><creatorcontrib>Pinho da Cruz, J.M.</creatorcontrib><creatorcontrib>Costa, J.M.</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering 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>Borrego, L.P.</au><au>Ferreira, J.M.</au><au>Pinho da Cruz, J.M.</au><au>Costa, J.M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evaluation of overload effects on fatigue crack growth and closure</atitle><jtitle>Engineering fracture mechanics</jtitle><date>2003-07-01</date><risdate>2003</risdate><volume>70</volume><issue>11</issue><spage>1379</spage><epage>1397</epage><pages>1379-1397</pages><issn>0013-7944</issn><eissn>1873-7315</eissn><abstract>Fatigue crack propagation tests with single tensile peak overloads have been performed in 6082-T6 aluminium alloy at several baseline Δ
K levels and stress ratios of 0.05 and 0.25. The tests were carried out at constant Δ
K conditions. Crack closure was monitored in all tests by the compliance technique using a pin microgauge. The observed transient post-overload behaviour is discussed in terms of overload ratio, baseline Δ
K level and stress ratio. The crack closure parameter
U was obtained and compared with the crack growth transients. Experimental support is given for the hypothesis that plasticity-induced closure is the main cause of overload retardation for plane stress conditions. Predictions based on crack closure measurements show good correlation with the observed crack growth rates for all the post-overload transients when discontinuous closure is properly taken into account.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/S0013-7944(02)00119-4</doi><tpages>19</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Engineering fracture mechanics, 2003-07, Vol.70 (11), p.1379-1397 |
| issn | 0013-7944 1873-7315 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_28072439 |
| source | Elsevier ScienceDirect Journals Complete |
| subjects | Aluminium alloys Crack closure Discontinuous closure Overloads Partial closure model |
| title | Evaluation of overload effects on fatigue crack growth and closure |
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