Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy
•We study the effect of occasional mode II loading on mode I fatigue crack growth.•A thin-walled 7075-T6511 aluminum alloy tube is used.•Retardation effect by crack closure is negligible.•Mode II growth is much faster than mode I growth in this alloy.•The accelerated mode II growth should be conside...
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| Veröffentlicht in: | Engineering fracture mechanics 2014-06, Vol.123, p.126-136 |
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| creator | Matsunaga, H. Makizaki, M. Socie, D.F. Yanase, K. Endo, M. |
| description | •We study the effect of occasional mode II loading on mode I fatigue crack growth.•A thin-walled 7075-T6511 aluminum alloy tube is used.•Retardation effect by crack closure is negligible.•Mode II growth is much faster than mode I growth in this alloy.•The accelerated mode II growth should be considered as a predominant factor.
The effect of an occasional mode II loading on the subsequent mode I fatigue crack growth was investigated in a thin-walled 7075-T6511 aluminum alloy tube. Careful observation of crack growth behavior revealed that an occasional mode II loading has two contrasting effects on the subsequent crack growth. First is a retardation effect that is associated with a crack closure development due to the mode II loading. However, this effect was insignificant with respect to the crack growth life as a whole. Second is an acceleration effect that is associated with an accelerated crack growth rate in mode II. It was found that, in a relatively high ΔK regime, mode II crack growth was from one to two orders of magnitude faster than mode I crack growth. This study shows that mode II crack growth should be considered as a predominant factor in evaluating the effect of an occasional mode II loading for a mode I crack in 7075 aluminum alloy. |
| doi_str_mv | 10.1016/j.engfracmech.2014.04.015 |
| format | Article |
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The effect of an occasional mode II loading on the subsequent mode I fatigue crack growth was investigated in a thin-walled 7075-T6511 aluminum alloy tube. Careful observation of crack growth behavior revealed that an occasional mode II loading has two contrasting effects on the subsequent crack growth. First is a retardation effect that is associated with a crack closure development due to the mode II loading. However, this effect was insignificant with respect to the crack growth life as a whole. Second is an acceleration effect that is associated with an accelerated crack growth rate in mode II. It was found that, in a relatively high ΔK regime, mode II crack growth was from one to two orders of magnitude faster than mode I crack growth. This study shows that mode II crack growth should be considered as a predominant factor in evaluating the effect of an occasional mode II loading for a mode I crack in 7075 aluminum alloy.</description><identifier>ISSN: 0013-7944</identifier><identifier>EISSN: 1873-7315</identifier><identifier>DOI: 10.1016/j.engfracmech.2014.04.015</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>7075 Aluminum alloy ; Acceleration ; Aluminum base alloys ; Crack closure ; Crack propagation ; Fatigue crack growth ; Fatigue failure ; Fracture mechanics ; Occasional shear loading ; Shear-mode growth ; Thin walled ; Tubes</subject><ispartof>Engineering fracture mechanics, 2014-06, Vol.123, p.126-136</ispartof><rights>2014 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c387t-f47cd16f78edcadfdaf1621e37cbda0a7a767abd7faba8901e75b67ee9301f333</citedby><cites>FETCH-LOGICAL-c387t-f47cd16f78edcadfdaf1621e37cbda0a7a767abd7faba8901e75b67ee9301f333</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.2014.04.015$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Matsunaga, H.</creatorcontrib><creatorcontrib>Makizaki, M.</creatorcontrib><creatorcontrib>Socie, D.F.</creatorcontrib><creatorcontrib>Yanase, K.</creatorcontrib><creatorcontrib>Endo, M.</creatorcontrib><title>Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy</title><title>Engineering fracture mechanics</title><description>•We study the effect of occasional mode II loading on mode I fatigue crack growth.•A thin-walled 7075-T6511 aluminum alloy tube is used.•Retardation effect by crack closure is negligible.•Mode II growth is much faster than mode I growth in this alloy.•The accelerated mode II growth should be considered as a predominant factor.
The effect of an occasional mode II loading on the subsequent mode I fatigue crack growth was investigated in a thin-walled 7075-T6511 aluminum alloy tube. Careful observation of crack growth behavior revealed that an occasional mode II loading has two contrasting effects on the subsequent crack growth. First is a retardation effect that is associated with a crack closure development due to the mode II loading. However, this effect was insignificant with respect to the crack growth life as a whole. Second is an acceleration effect that is associated with an accelerated crack growth rate in mode II. It was found that, in a relatively high ΔK regime, mode II crack growth was from one to two orders of magnitude faster than mode I crack growth. This study shows that mode II crack growth should be considered as a predominant factor in evaluating the effect of an occasional mode II loading for a mode I crack in 7075 aluminum alloy.</description><subject>7075 Aluminum alloy</subject><subject>Acceleration</subject><subject>Aluminum base alloys</subject><subject>Crack closure</subject><subject>Crack propagation</subject><subject>Fatigue crack growth</subject><subject>Fatigue failure</subject><subject>Fracture mechanics</subject><subject>Occasional shear loading</subject><subject>Shear-mode growth</subject><subject>Thin walled</subject><subject>Tubes</subject><issn>0013-7944</issn><issn>1873-7315</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqNUMGKFDEUDKLguPoP8eZlxvemp_O6j8ug7sDCXtajhDfJy2zG7s6adCv792YZD94UCl7xqCqoUuo9wgYBzcfzRqZTyOxGcQ-bLeBuAxXYvlAr7KhZU4PtS7UCwMr73e61elPKGQDIdLBS366dk0EyzzFNOgUdKjstol3N_K5POf2aH7Svjznp5ByXquNBj8mLPhz0kNjH6aTjpAmo1TwsY5yWsZIhPb1VrwIPRd79uVfq6-dP9_ub9e3dl8P--nbtmo7mddiR82gCdeId--A5oNmiNOSOnoGJyRAfPQU-ctcDCrVHQyJ9AxiaprlSHy65jzn9WKTMdoyl9hp4krQUi4Y6gC229G9pa2oR07dQpf1F6nIqJUuwjzmOnJ8sgn1e357tX-vb5_UtVGBbvfuLV2rtn1GyLS7K5MTHLG62PsX_SPkNIjGUTQ</recordid><startdate>20140601</startdate><enddate>20140601</enddate><creator>Matsunaga, H.</creator><creator>Makizaki, M.</creator><creator>Socie, D.F.</creator><creator>Yanase, K.</creator><creator>Endo, M.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</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>20140601</creationdate><title>Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy</title><author>Matsunaga, H. ; Makizaki, M. ; Socie, D.F. ; Yanase, K. ; Endo, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c387t-f47cd16f78edcadfdaf1621e37cbda0a7a767abd7faba8901e75b67ee9301f333</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>7075 Aluminum alloy</topic><topic>Acceleration</topic><topic>Aluminum base alloys</topic><topic>Crack closure</topic><topic>Crack propagation</topic><topic>Fatigue crack growth</topic><topic>Fatigue failure</topic><topic>Fracture mechanics</topic><topic>Occasional shear loading</topic><topic>Shear-mode growth</topic><topic>Thin walled</topic><topic>Tubes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Matsunaga, H.</creatorcontrib><creatorcontrib>Makizaki, M.</creatorcontrib><creatorcontrib>Socie, D.F.</creatorcontrib><creatorcontrib>Yanase, K.</creatorcontrib><creatorcontrib>Endo, M.</creatorcontrib><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</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>Matsunaga, H.</au><au>Makizaki, M.</au><au>Socie, D.F.</au><au>Yanase, K.</au><au>Endo, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy</atitle><jtitle>Engineering fracture mechanics</jtitle><date>2014-06-01</date><risdate>2014</risdate><volume>123</volume><spage>126</spage><epage>136</epage><pages>126-136</pages><issn>0013-7944</issn><eissn>1873-7315</eissn><abstract>•We study the effect of occasional mode II loading on mode I fatigue crack growth.•A thin-walled 7075-T6511 aluminum alloy tube is used.•Retardation effect by crack closure is negligible.•Mode II growth is much faster than mode I growth in this alloy.•The accelerated mode II growth should be considered as a predominant factor.
The effect of an occasional mode II loading on the subsequent mode I fatigue crack growth was investigated in a thin-walled 7075-T6511 aluminum alloy tube. Careful observation of crack growth behavior revealed that an occasional mode II loading has two contrasting effects on the subsequent crack growth. First is a retardation effect that is associated with a crack closure development due to the mode II loading. However, this effect was insignificant with respect to the crack growth life as a whole. Second is an acceleration effect that is associated with an accelerated crack growth rate in mode II. It was found that, in a relatively high ΔK regime, mode II crack growth was from one to two orders of magnitude faster than mode I crack growth. This study shows that mode II crack growth should be considered as a predominant factor in evaluating the effect of an occasional mode II loading for a mode I crack in 7075 aluminum alloy.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.engfracmech.2014.04.015</doi><tpages>11</tpages></addata></record> |
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| ispartof | Engineering fracture mechanics, 2014-06, Vol.123, p.126-136 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | 7075 Aluminum alloy Acceleration Aluminum base alloys Crack closure Crack propagation Fatigue crack growth Fatigue failure Fracture mechanics Occasional shear loading Shear-mode growth Thin walled Tubes |
| title | Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy |
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