A pathdependent fatigue crack propagation model under nonproportional modes I and III loading conditions
It has been well established that fatigue damage process is loadpath dependent under nonproportional multiaxial loading conditions. Most of studies to date have been focusing on interpretation of SN based test data by constructing a pathdependent fatigue damage model. Our paper presents a twoparameter mixedmode fatigue crack growth model which takes into account of crack growth dependency on both load path traversed and a maximum effective stress intensity attained in a stress intensity factor plane (e.g.,KIKIII plane). Furthermore, by taking advantage of a pathdependent maximum range (PDMR) cycle definition (Dong et al., 2010; Wei and Dong, 2010), the two parameters are formulated by introducing a moment of load path (MLP) based equivalent stress intensity factor range (ΔKNP) and a maximum effective stress intensity parameter KMax incorporating an interaction term KI·KIII. To examine the effectiveness of the proposed model, two sets of crack growth rate test data are considered. The first set is obtained as a part of this study using 304 stainless steel disk specimens subjected to three combined nonproportional modes I and III loading conditions (i.e., with a phase angle of 0°, 90°, and 180°). The second set was obtained by Feng et al. (2007) using 1070 steel diskmore »
 Authors:

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 Univ. of Michigan, Ann Arbor, MI (United States)
 Univ. of Nevada, Reno, NV (United States)
 Tenneco, Grass Lake, MI (United States)
 Publication Date:
 Grant/Contract Number:
 AC0500OR22725
 Type:
 Accepted Manuscript
 Journal Name:
 Engineering Fracture Mechanics
 Additional Journal Information:
 Journal Volume: 182; Journal Issue: C; Journal ID: ISSN 00137944
 Publisher:
 Elsevier
 Research Org:
 Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
 Sponsoring Org:
 USDOE
 Country of Publication:
 United States
 Language:
 English
 Subject:
 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Mixed mode crack growth; Multiaxial fatigue; Nonproportional loading; Moment of load path; Effective stress intensity factor; K plane; Pathdependent fatigue damage; Pathdependent cycle counting
 OSTI Identifier:
 1376654
Mei, J., Dong, P., Kalnaus, S., Jiang, Y., and Wei, Z.. A pathdependent fatigue crack propagation model under nonproportional modes I and III loading conditions. United States: N. p.,
Web. doi:10.1016/j.engfracmech.2017.07.026.
Mei, J., Dong, P., Kalnaus, S., Jiang, Y., & Wei, Z.. A pathdependent fatigue crack propagation model under nonproportional modes I and III loading conditions. United States. doi:10.1016/j.engfracmech.2017.07.026.
Mei, J., Dong, P., Kalnaus, S., Jiang, Y., and Wei, Z.. 2017.
"A pathdependent fatigue crack propagation model under nonproportional modes I and III loading conditions". United States.
doi:10.1016/j.engfracmech.2017.07.026. https://www.osti.gov/servlets/purl/1376654.
@article{osti_1376654,
title = {A pathdependent fatigue crack propagation model under nonproportional modes I and III loading conditions},
author = {Mei, J. and Dong, P. and Kalnaus, S. and Jiang, Y. and Wei, Z.},
abstractNote = {It has been well established that fatigue damage process is loadpath dependent under nonproportional multiaxial loading conditions. Most of studies to date have been focusing on interpretation of SN based test data by constructing a pathdependent fatigue damage model. Our paper presents a twoparameter mixedmode fatigue crack growth model which takes into account of crack growth dependency on both load path traversed and a maximum effective stress intensity attained in a stress intensity factor plane (e.g.,KIKIII plane). Furthermore, by taking advantage of a pathdependent maximum range (PDMR) cycle definition (Dong et al., 2010; Wei and Dong, 2010), the two parameters are formulated by introducing a moment of load path (MLP) based equivalent stress intensity factor range (ΔKNP) and a maximum effective stress intensity parameter KMax incorporating an interaction term KI·KIII. To examine the effectiveness of the proposed model, two sets of crack growth rate test data are considered. The first set is obtained as a part of this study using 304 stainless steel disk specimens subjected to three combined nonproportional modes I and III loading conditions (i.e., with a phase angle of 0°, 90°, and 180°). The second set was obtained by Feng et al. (2007) using 1070 steel disk specimens subjected to similar types of nonproportional mixedmode conditions. Once the proposed twoparameter nonproportional mixedmode crack growth model is used, it is shown that a good correlation can be achieved for both sets of the crack growth rate test data.},
doi = {10.1016/j.engfracmech.2017.07.026},
journal = {Engineering Fracture Mechanics},
number = C,
volume = 182,
place = {United States},
year = {2017},
month = {7}
}