{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,2]],"date-time":"2025-08-02T17:55:19Z","timestamp":1754157319279,"version":"3.41.2"},"reference-count":13,"publisher":"Emerald","issue":"3","license":[{"start":{"date-parts":[[2010,8,1]],"date-time":"2010-08-01T00:00:00Z","timestamp":1280620800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.emerald.com\/insight\/site-policies"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2010,8,1]]},"abstract":"Purpose<\/jats:title>The purpose of this paper is to complement available macroscopic fatigue crack growth measurements in flat stiffened panels with scanning electron microscopy (SEM) measurements of striation spacing.<\/jats:p><\/jats:sec>Design\/methodology\/approach<\/jats:title>The paper's approach is fatigue testing of two\u2010stiffener flat panels manufactured using three different processes, with a central initial crack perpendicular to the stiffeners and load, in order to identify striation spacing during crack growth up to final fracture, using SEM.<\/jats:p><\/jats:sec>Findings<\/jats:title>An increase of striation spacing as cracks grow was quantified. Although when cracks approach the stiffeners the stress intensity factor decreases, there is no clear decrease of striation spacing in that region. Striation spacing is roughly similar to macroscopic crack\u2010propagation rate da\/dN measured in the panels testing. This observation is no longer valid once the stiffeners are reached; this stage is characterized by fast acceleration of the cracking process until final complete rupture is verified, and macroscopic crack growth measurements are made difficult because of the \u201cT\u201d geometry in that region.<\/jats:p><\/jats:sec>Originality\/value<\/jats:title>A complete picture of the striation spacing during the fatigue crack growth up to final fracture of a two\u2010stiffener flat panel is provided for three different manufacturing processes: high\u2010speed machining, laser beam welding and friction stir welding.<\/jats:p><\/jats:sec>","DOI":"10.1108\/17579861011092373","type":"journal-article","created":{"date-parts":[[2010,11,6]],"date-time":"2010-11-06T08:05:36Z","timestamp":1289030736000},"page":"233-258","source":"Crossref","is-referenced-by-count":6,"title":["Fractographic analysis of fatigue crack growth in lightweight integral stiffened panels"],"prefix":"10.1108","volume":"1","author":[{"given":"Pedro M.G.P.","family":"Moreira","sequence":"first","affiliation":[]},{"given":"Paulo M.S.T.","family":"de Castro","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"key":"key2020022115543122000_b1","unstructured":"Brot, A. and Peleg\u2010Wolfin, Y. (2008), \u201cThe damage\u2010tolerance behaviour of integrally stiffened metallic structures\u201d, paper presented at the 48th Israel Annual Conference on Aerospace Sciences, Tel\u2010Aviv."},{"key":"key2020022115543122000_b2","unstructured":"DaToN (2006), \u201cInnovative fatigue and damage tolerance methods for the application of new structural concepts\u201d, Aeronautics Research 2003\u20102006 projetcs. Project synopses, Vol. 1."},{"key":"key2020022115543122000_b3","unstructured":"de Matos, P.F.P., Moreira, P.M.G.P., Nedbal, I. and de Castro, P.M.S.T. (2005), \u201cReconstitution of fatigue crack growth in Al\u2010alloy 2024\u2010T3 open\u2010hole specimens using microfractographic techniques\u201d, Engineering Fracture Mechanics, Vol. 72 No. 14, pp. 2232\u201046."},{"key":"key2020022115543122000_b4","unstructured":"Dexter, R. and Pilarski, P. (2002), \u201cCrack propagation in welded stiffened panels\u201d, Journal of Constructional Steel Research, Vol. 58 Nos 5\u20108, pp. 1081\u2010102."},{"key":"key2020022115543122000_b5","unstructured":"Dexter, R., Pilarski, P. and Mahmoud, H. (2003), \u201cAnalysis of crack propagation in welded stiffened panels\u201d, International Journal of Fatigue, Vol. 25 Nos 9\u201011, pp. 1169\u201074."},{"key":"key2020022115543122000_b6","unstructured":"Edwards, L., Fitzpatrick, M., Irving, P., Sinclair, I., Zhang, X. and Yapp, D. (2006), \u201cAn integrated approach to the determination and consequences of residual stress on the fatigue performance of welded aircraft structures\u201d, Journal of ASTM International, Vol. 3 No. 2, pp. 1\u201017."},{"key":"key2020022115543122000_b7","unstructured":"Llopart, L., Kurz, B., Wellhausen, C., Anglada, M., Drechsler, K. and Wolf, K. (2006), \u201cInvestigation of fatigue crack growth and crack turning on integral stiffened structures under mode I loading\u201d, Engineering Fracture Mechanics, Vol. 73 No. 15, pp. 2139\u201052."},{"key":"key2020022115543122000_b8","unstructured":"Moreira, P.M.G.P., Richter\u2010Trummer, V., Tavares, S.M.O. and de Castro, P.M.S.T. (2010), \u201cCharacterization of fatigue crack growth rate of AA6056 T651 and T6: application to predict fatigue behaviour of stiffened panels\u201d, Materials Science Forum, Vol. 636\u2010637, pp. 1511\u201017."},{"key":"key2020022115543122000_b9","unstructured":"Murphy, A., McCune, W., Quinn, D. and Price, M. (2007), \u201cThe characterisation of friction stir welding process effects on stiffened panel buckling performance\u201d, Thin\u2010Walled Structures, Vol. 45 No. 3, pp. 339\u201051."},{"key":"key2020022115543122000_b10","doi-asserted-by":"crossref","unstructured":"Paik, J., van der Veen, S., Duran, A. and Collette, M. (2005), \u201cUltimate compressive strength design methods of aluminum welded stiffened panel structures for aerospace, marine and land\u2010based applications: a benchmark study\u201d, Thin\u2010Walled Structures, Vol. 43 No. 10, pp. 1550\u201066.","DOI":"10.1016\/j.tws.2005.06.003"},{"key":"key2020022115543122000_b11","unstructured":"Pettit, R., Wang, J. and Toh, C. (2000), \u201cValidated feasibility study of integrally stiffened metallic fuselage panels for reducing manufacturing costs\u201d, NASA\/CR\u20102000\u2010209342."},{"key":"key2020022115543122000_b12","doi-asserted-by":"crossref","unstructured":"Siegl, J., Nedbal, I. and Kunz, J. (2009), \u201cFatigue crack growth history in damage tolerance design of aircraft structures\u201d, International Journal of Fatigue, Vol. 31 No. 6, pp. 1062\u20107.","DOI":"10.1016\/j.ijfatigue.2008.05.006"},{"key":"key2020022115543122000_b13","unstructured":"Uz, M.V., Kocak, M., Lemaitre, F., Ehrstrom, J.C., Kempa, S. and Bron, F. (2009), \u201cImprovement of damage tolerance of laser beam welded stiffened panels for airframes via local engineering\u201d, International Journal of Fatigue, Vol. 31 No. 5, pp. 916\u201026."}],"container-title":["International Journal of Structural Integrity"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/www.emeraldinsight.com\/doi\/full-xml\/10.1108\/17579861011092373","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.emerald.com\/insight\/content\/doi\/10.1108\/17579861011092373\/full\/xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.emerald.com\/insight\/content\/doi\/10.1108\/17579861011092373\/full\/html","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,7,24]],"date-time":"2025-07-24T23:46:48Z","timestamp":1753400808000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.emerald.com\/ijsi\/article\/1\/3\/233-258\/157595"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,8,1]]},"references-count":13,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2010,8,1]]}},"alternative-id":["10.1108\/17579861011092373"],"URL":"https:\/\/doi.org\/10.1108\/17579861011092373","relation":{},"ISSN":["1757-9864"],"issn-type":[{"type":"print","value":"1757-9864"}],"subject":[],"published":{"date-parts":[[2010,8,1]]}}}