This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Crack Initiation and Propagation Predictions for ManTen and RQC-100 Steel Keyhole Notched Specimens Tested by the Fatigue Design & Evaluation Committee of SAE
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Crack initiation and propagation test data gathered during tests on Keyhole notched samples is used to evaluate a fatigue life prediction technique. Materials tested include a lower strength ManTen steel and a higher strength Boron steel, RQC-100, both tested with constant and variable amplitude histories. Initiation fatigue life is predicted using the usual method of plasticity correction at the notch followed by a Palmgren-Miner summation of damage with mean stress correction. The emphasis of the study is on simulating the crack propagation results. For that phase discretetize da/dN vs ΔK lines and thresholds for negative R ratios, are used specifically to help predict the propagation for one of the VA histories that had a significant negative mean. The open source crack propagation simulation program applies a material memory model to determine the crack advance on a reversal by reversal basis. The resulting total life and crack advance plots are compared with the experimental observations.
CitationConle, F., "Crack Initiation and Propagation Predictions for ManTen and RQC-100 Steel Keyhole Notched Specimens Tested by the Fatigue Design & Evaluation Committee of SAE," SAE Technical Paper 2020-01-0191, 2020, https://doi.org/10.4271/2020-01-0191.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
- Tucker, L. and Bussa, S. , “The SAE Cumulative Fatigue Damage Test Program,” SAE Technical Paper 750038 , 1975, https://doi.org/10.4271/750038.
- Conle, F.A. , “Crack Initiation and Propagation Fatigue Life Prediction for an A36 Steel Welded Plate Specimen,” SAE Technical Paper 2019-01-0538 , 2019, https://doi.org/10.4271/2019-01-0538.
- BS7910-2005 , “Guide to Methods for Assessing the Acceptability of Flaws in Metallic Structures,” British Std.
- Hasegawa, K., Yamaguchi, Y., Mares, V., and Li, Y. , “Fatigue Crack Growth Rates for Ferritic Steels Under Negative R Ratio,” Paper PVP2016-63872, in Proc. of ASME2016 Press. Vess. Piping Conf., Vancouver, July 17-21, 2016.
- EN 1993-1-9:2003 , “Eurocode 3: Design of Steel Structures. Part 1.9: Fatigue.”
- “Transmission, Suspension and Bracket Histories and Plots of Crack Propagation from Fatigue Design & Eval. Comm. Keyhole Specimen Project,” http://fde.uwaterloo.ca/Fde/Loads/Keyhole/keyhole.html.
- ASTM Standard E647 , “Standard Test Method for Measurement of Fatigue Crack Growth Rates, CT Specimen.”
- ASME , Boiler and Pressure Vessel Code, Section XI Appendix A and C, American Soc. Mech Engrs, 2017.
- Neal, S., Zachary, L.W., and Burger, C.P. , “Three-Dimensional Stress Analysis of the SAE Keyhole Fatigue Specimen,” SAE Technical Paper 780104 , 1978, https://doi.org/10.4271/780104.
- Neuber, H. , “Theory of Stress Concentration for Shear Strained Prismatic Bodies with Arbitrary Non-Linear Stress-Strain Law,” J. Appl. Mech, Trans. ASME 28(4):544-560, Dec. 1961.
- Smith, K.N., Watson, P., and Topper, T.H. , “A Stress Strain Function for the Fatigue of Metals,” J. Materials 5(5):767-778, 1970.
- Morrow, J. , Section 3.2 of SAE “Fatigue Design Handbook,” 1968.
- Conle, F.A. , “A Collection of Cyclic Mean Stress Relaxation Data,” Pres. at F.D.E. of SAE, Spring 2019 Meeting Cobo Hall, Detroit, MI, Apr 9, 2019, http://fde.uwaterloo.ca/Fde/Articles/fde2019RelaxPres4Web.pdf.
- “Crack Propagation, Crack Initiation, and Rain-Flow Cycle Count OpenSource Programs,” https://github.com/pdprop/pdprop/tree/Master/CleanPdprop or https://github.com/pdprop/pdprop/blob/Master/pdprop.tar.gz.