Potential drop method for online crack length measurement during fracture testing: Development of a correction procedure
•A procedure is proposed to correct overestimation of crack length by DCPD.•Procedure uses blunting line equation and measured stretch zone width.•Application of this procedure to fracture test data on SS 316L(N) is demonstrated.•The J-R curve results compare favorably with those from standard metho...
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| Veröffentlicht in: | Engineering fracture mechanics 2017-07, Vol.180, p.148-160 |
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| container_title | Engineering fracture mechanics |
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| creator | Gajji, Aneesha Sasikala, G. |
| description | •A procedure is proposed to correct overestimation of crack length by DCPD.•Procedure uses blunting line equation and measured stretch zone width.•Application of this procedure to fracture test data on SS 316L(N) is demonstrated.•The J-R curve results compare favorably with those from standard methods.
Though the potential drop method is included in testing standards for creep and fatigue crack growth, it is not used in fracture toughness tests because it overestimates the crack length during the initial loading due to crack tip plastic deformation. In the present paper, a procedure is proposed for correcting for this by using the blunting line equation and stretch zone width, a physical parameter as the reference. Compact tension samples of three different thicknesses were employed. The results after correction are compared with those from the standard methods, viz., elastic unloading compliance and normalization methods. |
| doi_str_mv | 10.1016/j.engfracmech.2017.05.033 |
| format | Article |
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Though the potential drop method is included in testing standards for creep and fatigue crack growth, it is not used in fracture toughness tests because it overestimates the crack length during the initial loading due to crack tip plastic deformation. In the present paper, a procedure is proposed for correcting for this by using the blunting line equation and stretch zone width, a physical parameter as the reference. Compact tension samples of three different thicknesses were employed. The results after correction are compared with those from the standard methods, viz., elastic unloading compliance and normalization methods.</description><identifier>ISSN: 0013-7944</identifier><identifier>EISSN: 1873-7315</identifier><identifier>DOI: 10.1016/j.engfracmech.2017.05.033</identifier><language>eng</language><publisher>New York: Elsevier Ltd</publisher><subject>Compact tension ; Crack length measurement ; Crack propagation ; Cracks ; DCPD ; Fatigue failure ; Fatigue tests ; Fracture mechanics ; Fracture testing ; Fracture toughness ; Modulus of elasticity ; Physical properties ; Plastic deformation ; Plasticity ; Stretch zone</subject><ispartof>Engineering fracture mechanics, 2017-07, Vol.180, p.148-160</ispartof><rights>2017 Elsevier Ltd</rights><rights>Copyright Elsevier BV Jul 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c349t-c0e16ef7c83324937b46651e9a87e3179ae146a39e2c439a3c46796b550c30fc3</citedby><cites>FETCH-LOGICAL-c349t-c0e16ef7c83324937b46651e9a87e3179ae146a39e2c439a3c46796b550c30fc3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S001379441730214X$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Gajji, Aneesha</creatorcontrib><creatorcontrib>Sasikala, G.</creatorcontrib><title>Potential drop method for online crack length measurement during fracture testing: Development of a correction procedure</title><title>Engineering fracture mechanics</title><description>•A procedure is proposed to correct overestimation of crack length by DCPD.•Procedure uses blunting line equation and measured stretch zone width.•Application of this procedure to fracture test data on SS 316L(N) is demonstrated.•The J-R curve results compare favorably with those from standard methods.
Though the potential drop method is included in testing standards for creep and fatigue crack growth, it is not used in fracture toughness tests because it overestimates the crack length during the initial loading due to crack tip plastic deformation. In the present paper, a procedure is proposed for correcting for this by using the blunting line equation and stretch zone width, a physical parameter as the reference. Compact tension samples of three different thicknesses were employed. The results after correction are compared with those from the standard methods, viz., elastic unloading compliance and normalization methods.</description><subject>Compact tension</subject><subject>Crack length measurement</subject><subject>Crack propagation</subject><subject>Cracks</subject><subject>DCPD</subject><subject>Fatigue failure</subject><subject>Fatigue tests</subject><subject>Fracture mechanics</subject><subject>Fracture testing</subject><subject>Fracture toughness</subject><subject>Modulus of elasticity</subject><subject>Physical properties</subject><subject>Plastic deformation</subject><subject>Plasticity</subject><subject>Stretch zone</subject><issn>0013-7944</issn><issn>1873-7315</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqNUMtOwzAQtBBIlMI_GHFOsOvEjrmh8pSQ4ABny3U3rUMSB8et4O_ZUg4cOe1qPQ_PEHLOWc4Zl5dNDv2qjtZ14Nb5jHGVszJnQhyQCa-UyJTg5SGZMMZx10VxTE7GsWGMKVmxCfl8CQn65G1LlzEMtIO0Dktah0hD3_oeqEPxd9qiTVrjsx03ETqk0OUm-n5Fd-YJbzTBmPBwRW9gC20YfkChppa6ECO45ENPhxgcIBNOyVFt2xHOfueUvN3dvs4fsqfn-8f59VPmRKFT5hhwCbVylRCzQgu1KKQsOWhbKRBcaQu8kFZomLlCaCtcIZWWi7JkTrDaiSm52Oui88cGv2iasIk9WhqOcrIqZ6VElN6jXAzjGKE2Q_SdjV-GM7Mr2jTmT9FmV7RhpcGikTvfcwFjbD1EMzoPPcb0u9RmGfw_VL4BIFuOtA</recordid><startdate>20170701</startdate><enddate>20170701</enddate><creator>Gajji, Aneesha</creator><creator>Sasikala, G.</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>20170701</creationdate><title>Potential drop method for online crack length measurement during fracture testing: Development of a correction procedure</title><author>Gajji, Aneesha ; Sasikala, G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c349t-c0e16ef7c83324937b46651e9a87e3179ae146a39e2c439a3c46796b550c30fc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Compact tension</topic><topic>Crack length measurement</topic><topic>Crack propagation</topic><topic>Cracks</topic><topic>DCPD</topic><topic>Fatigue failure</topic><topic>Fatigue tests</topic><topic>Fracture mechanics</topic><topic>Fracture testing</topic><topic>Fracture toughness</topic><topic>Modulus of elasticity</topic><topic>Physical properties</topic><topic>Plastic deformation</topic><topic>Plasticity</topic><topic>Stretch zone</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gajji, Aneesha</creatorcontrib><creatorcontrib>Sasikala, G.</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>Gajji, Aneesha</au><au>Sasikala, G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Potential drop method for online crack length measurement during fracture testing: Development of a correction procedure</atitle><jtitle>Engineering fracture mechanics</jtitle><date>2017-07-01</date><risdate>2017</risdate><volume>180</volume><spage>148</spage><epage>160</epage><pages>148-160</pages><issn>0013-7944</issn><eissn>1873-7315</eissn><abstract>•A procedure is proposed to correct overestimation of crack length by DCPD.•Procedure uses blunting line equation and measured stretch zone width.•Application of this procedure to fracture test data on SS 316L(N) is demonstrated.•The J-R curve results compare favorably with those from standard methods.
Though the potential drop method is included in testing standards for creep and fatigue crack growth, it is not used in fracture toughness tests because it overestimates the crack length during the initial loading due to crack tip plastic deformation. In the present paper, a procedure is proposed for correcting for this by using the blunting line equation and stretch zone width, a physical parameter as the reference. Compact tension samples of three different thicknesses were employed. The results after correction are compared with those from the standard methods, viz., elastic unloading compliance and normalization methods.</abstract><cop>New York</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.engfracmech.2017.05.033</doi><tpages>13</tpages></addata></record> |
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| ispartof | Engineering fracture mechanics, 2017-07, Vol.180, p.148-160 |
| issn | 0013-7944 1873-7315 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Compact tension Crack length measurement Crack propagation Cracks DCPD Fatigue failure Fatigue tests Fracture mechanics Fracture testing Fracture toughness Modulus of elasticity Physical properties Plastic deformation Plasticity Stretch zone |
| title | Potential drop method for online crack length measurement during fracture testing: Development of a correction procedure |
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