An assessment of a strain-life approach for fatigue crack growth

被引:31
|
作者
Hafezi, Mohammad Hadi [1 ]
Abdullah, N. Nik [1 ]
Correia, Jose F. O. [2 ]
De Jesus, Abilio M. P. [3 ]
机构
[1] Univ Kebangsaan Malaysia, Dept Mech & Mat Engn, Bangi, Malaysia
[2] UCVE IDMEC, Polo FEUP, Oporto, Portugal
[3] Univ Tras Os Montes & Alto Douro, UCVE IDMEC, Vila Real, Portugal
关键词
Fatigue crack propagation; Strain-life approach; Residual stresses; Finite element analysis; Old bridge materials; Fatigue; Strain measurement;
D O I
10.1108/17579861211281173
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Purpose - Fatigue crack growth models based on elastic-plastic stress-strain histories at the crack tip region and strain-life 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. Design/methodology/approach - The UniGrow model is assessed using data derived by the authors for materials from Portuguese riveted metallic bridges. Strain-life 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-based propagation model, elastoplastic finite element analysis is proposed for comparison with the analytical approach implemented in the original UniGrow model. Findings - The use of the Smith-Watson-Topper damage parameter overestimates the stress R-ratio effects on crack propagation rates, mainly if the material shows crack propagation rates with small to moderate sensitivity to stress R-ratio, which is the case of the materials under investigation in this paper. Alternatively, the application of the Coffin-Manson damage law leads to consistent fatigue crack growth predictions for the investigated range of positive stress R-ratios. The stress R-ratios 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. Originality/value - Contributions for more accurate predictions of fatigue crack propagation rates, for several stress ratios, using a strain-based 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.
引用
收藏
页码:344 / 376
页数:33
相关论文
共 50 条
  • [1] Statistical evaluation of strain-life fatigue crack initiation predictions
    Meggiolaro, MA
    Castro, JTP
    [J]. INTERNATIONAL JOURNAL OF FATIGUE, 2004, 26 (05) : 463 - 476
  • [2] Estimation of crack opening stresses from strain-life fatigue data
    Khalil, M
    Lam, T
    Topper, TH
    [J]. FATIGUE 2000: FATIGUE & DURABILITY ASSESSMENT OF MATERIALS, COMP ONENTS AND STRUCTURES, 2000, : 449 - 456
  • [3] Fatigue assessment of high loaded bolted bar connection using strain-life approach
    Glodez, S.
    Knez, M.
    Kramberger, J.
    Abersek, B.
    [J]. FRACTURE AND DAMAGE MECHANICS V, PTS 1 AND 2, 2006, 324-325 : 711 - +
  • [4] FATIGUE LIFE ANALYSIS OF AN AUTOMOTIVE TENSIONER THROUGH STRAIN-LIFE APPROACH
    Talimi, Maryam
    Zu, Jean W.
    [J]. INTERNATIONAL DESIGN ENGINEERING TECHNICAL CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE, 2015, VOL 10, 2016,
  • [5] An online algorithm for temperature influenced fatigue-life estimation: strain-life approach
    Nagode, M
    Zingsheim, F
    [J]. INTERNATIONAL JOURNAL OF FATIGUE, 2004, 26 (02) : 155 - 161
  • [6] A simple strain-life approach for the fatigue life evaluation of welded joints with residual stresses
    Goo, BC
    Yang, SY
    Lee, DH
    [J]. FRACTURE AND STRENGTH OF SOLIDS VI, PTS 1 AND 2, 2006, 306-308 : 127 - 132
  • [7] Derivation of Effective Strain-Life Data, Crack Closure Parameters and Effective Crack Growth Data from Smooth Specimen Fatigue Tests
    El-Zeghayar, Maria
    Topper, Tim
    Bonnen, John J.
    [J]. SAE INTERNATIONAL JOURNAL OF MATERIALS AND MANUFACTURING, 2013, 6 (03) : 576 - 588
  • [8] Characterizing statistical strain-life fatigue parameters
    Williams, CR
    Lee, YL
    Rilly, JT
    [J]. INTERNATIONAL JOURNAL OF MATERIALS & PRODUCT TECHNOLOGY, 2004, 20 (1-3): : 220 - 230
  • [9] Mean stress effects in strain-life fatigue
    Dowling, N. E.
    [J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2009, 32 (12) : 1004 - 1019
  • [10] Characterizing statistical strain-life fatigue parameters
    Williams, Christopher R.
    Lee, Yung-Li
    Rilly, John T.
    [J]. International Journal of Materials and Product Technology, 2003, 20 (1-3) : 220 - 230