{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,8]],"date-time":"2025-11-08T22:38:33Z","timestamp":1762641513749,"version":"3.41.2"},"reference-count":32,"publisher":"Emerald","issue":"4","license":[{"start":{"date-parts":[[2012,11,16]],"date-time":"2012-11-16T00:00:00Z","timestamp":1353024000000},"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":[[2012,11,16]]},"abstract":"<jats:sec><jats:title content-type=\"abstract-heading\">Purpose<\/jats:title><jats:p>Fatigue crack growth models based on elastic\u2010plastic stress\u2010strain histories at the crack tip region and strain\u2010life damage models have been proposed. The UniGrow model fits this particular class of fatigue crack propagation models. The residual stresses developed at the crack tip play a central role in these models, since they are applied to assess the actual crack driving force. This paper aims to assess the performance of the UniGrow model based on available experimental constant amplitude crack propagation data, derived for several metallic materials from representative Portuguese bridges. It also aims to discuss key issues in fatigue crack growth prediction, using the UniGrow model, in particular the residual stress computation and the suitability of fatigue damage rules.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Design\/methodology\/approach<\/jats:title><jats:p>The UniGrow model is assessed using data derived by the authors for materials from Portuguese riveted metallic bridges. Strain\u2010life data, from fatigue tests on smooth specimens, are used to propose a convenient fatigue damage model. Predicted crack growth rates are compared with experimental crack propagation data obtained by authors using fatigue tests on compact tension specimens. Since the UniGrow model is a residual stress\u2010based propagation model, elastoplastic finite element analysis is proposed for comparison with the analytical approach implemented in the original UniGrow model.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Findings<\/jats:title><jats:p>The use of the Smith\u2010Watson\u2010Topper damage parameter overestimates the stress <jats:italic>R<\/jats:italic>\u2010ratio effects on crack propagation rates, mainly if the material shows crack propagation rates with small to moderate sensitivity to stress <jats:italic>R<\/jats:italic>\u2010ratio, which is the case of the materials under investigation in this paper. Alternatively, the application of the Coffin\u2010Manson damage law leads to consistent fatigue crack growth predictions for the investigated range of positive stress <jats:italic>R<\/jats:italic>\u2010ratios. The stress <jats:italic>R<\/jats:italic>\u2010ratios effects may be solely attributed to the residual stresses. Their estimation, using an analytical approach, may lead to inconsistent results, which is demonstrated by an alternative elastoplastic finite element analysis.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Originality\/value<\/jats:title><jats:p>Contributions for more accurate predictions of fatigue crack propagation rates, for several stress ratios, using a strain\u2010based approach is proposed. This approach is valuable since it may be used to reduce the time consuming and costly fatigue crack propagation tests. Furthermore, the proposed approach shows potential for an unified crack initiation and propagation approach.<\/jats:p><\/jats:sec>","DOI":"10.1108\/17579861211281173","type":"journal-article","created":{"date-parts":[[2012,11,22]],"date-time":"2012-11-22T05:11:29Z","timestamp":1353561089000},"page":"344-376","source":"Crossref","is-referenced-by-count":35,"title":["An assessment of a strain\u2010life approach for fatigue crack growth"],"prefix":"10.1108","volume":"3","author":[{"given":"Mohammad","family":"Hadi Hafezi","sequence":"first","affiliation":[]},{"given":"N.","family":"Nik Abdullah","sequence":"additional","affiliation":[]},{"given":"Jos\u00e9 F.O.","family":"Correia","sequence":"additional","affiliation":[]},{"given":"Ab\u00edlio M.P.","family":"De Jesus","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"key":"key2022021720461717100_b1","unstructured":"ASTM (1998), \u201cASTM E606: standard practice for strain\u2010controlled fatigue testing\u201d, Annual Book of ASTM Standards, Vol. 03.01, American Society for Testing and Materials, West Conshohocken, PA."},{"key":"key2022021720461717100_b2","unstructured":"ASTM (2000), \u201cASTM E647: standard test method for measurement of fatigue crack growth rates\u201d, Annual Book of ASTM Standards, Vol. 03.01, American Society for Testing and Materials, West Conshohocken, PA."},{"key":"key2022021720461717100_b3","unstructured":"Beden, S.M., Abdullah, S. and Ariffin, A.K. 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