A defect tolerant approach to fatigue modeling for constant amplitude loading was developed by Bruzzi and McHugh (2002) and applied to two metal matrix composites: (1) a forged 2124 Al reinforced with 17 percent SiC particles and (2) a cast 359 Al reinforced with 20 percent SiC particles MMC in Bruzzi and McHugh (2003). In reality, however, engineering components are invariably subjected to varying cyclic stress amplitudes. In order to investigate the suitability of extending the fatigue modelling approach developed to variable amplitude loading, the effects of single and periodic peak tensile overloads are investigated in this work for the case of the Al 2124 MMC. The effects of overloads in causing significant changes to the level of closure in the wake of the crack tip, following the overload, in addition to changes in the nominally applied stress amplitude are firstly discussed in an overview. The quantification of the effects of overloads by use of experimental “resistance to crack growth curves” and the extension of the fatigue modeling approach to account for these effects are then described and investigated. Finally the predicted results of the impact of overloads on the short crack growth behavior of the Al 2124 MMC are presented and discussed. The extension of the fatigue modeling approach to account for the effects of overloads provides an additional means of validating the modelling approach developed by Bruzzi and McHugh (2002, 2003).
Issue Section:
Technical Papers
1.
Bruzzi
, M.S.
, and McHugh
, P.E.
, 2002
, “Methodology for Modelling the Small Crack Fatigue Behavior of Aluminum Alloys
,” Int. J. Fatigue
, 24
(10
), pp. 1071
–1078
.2.
Bruzzi
, M.S.
, and McHugh
, P.E.
, 2003
, “Application of Closure Based Fatigue Modelling Methodology to Al-SiC MMCs
,” Int. J. Fatigue
, 25
(7
), pp. 577
–584
.3.
Elber, W., 1971, “The significance of fatigue crack closure. Damage Tolerance in Aircraft Structures,” Special Technical Publication 486, American Society for Testing and Materials, Philadelphia, PA, pp. 230–242.
4.
Bernard
, P.J.
, Lindley
, T.C.
, and Richards
, C.E.
, 1977, “The Effect of Single Overloads on Fatigue Crack Propagation in Steels,” Met. Sci., Aug./Sept., pp. 390–398.5.
Robin
, C.
, Louah
, M.
, and Pluvinage
, G.
, 1983
, “Influence of an Overload on the Fatigue Crack Growth in Steels
,” Fatigue Fract. Eng. Mater. Struct.
, 6
(1
), pp. 1
–13
.6.
Corlby
, D.M.
, and Packman
, P.F.
, 1973
, “On the Influence of Single and Multiple Peak Overload Son Fatigue Crack Propagation in 7075-T6511 Aluminum
,” Eng. Fract. Mech.
, 5
, pp. 479
–497
.7.
Lankford, J., and Davidson, D.L., 1981, “The Effect of Overloads Upon Fatigue Crack Tip Opening Displacement and Crack Tip Opening/Closing Loads in Aluminum Alloys,” Advances in Fracture Research, Proceedings, Fifth International Conference on Fracture, France, D. Francois et al., eds., Pergamon Press, U.K., 2, pp. 899–906.
8.
Schijve, J., 1960, “Fatigue Crack Propagation in Light Alloy Sheet Material and Structures,” Report MP195, National Luchtvaart Laboratorium, Amsterdam, The Netherlands.
9.
von Euw, E.F.J., Hertzberg, R.W., and Roberts, R., 1972, “Delay Effects in Fatigue Crack Propagation,” Stress Analysis and Growth of Cracks, Proceedings of the 1971 National Symposium on Fracture Mechanics, Part 1, ASTM STP 513, American Society for Testing and Materials, Philadelphia, PA, pp. 230–259.
10.
Lankford
, J.
, and Davidson
, D.L.
, 1976, “Fatigue Crack Tip Plasticity Associated With Overloads and Subsequent Cycling,” ASME J. Eng. Mater. Technol., Transactions. ASME, New York, pp. 17–23.11.
Fleck
, N.A.
, Smith
, I.F.C.
, and Smith
, R.A.
, 1983
, “Closure Behavior of Surface Cracks
,” Fatigue Fract. Eng. Mater. Struct.
, 6
(3
), pp. 225
–239
.12.
Suresh
, S.
, 1983
, “Micromechanisms of Fatigue Crack Growth Retardation Following Overloads
,” Eng. Fract. Mech.
, 18
(3
), pp. 577
–593
.13.
Schijve
, J.
, 1981
, “The Effect of an Irregular Crack Front on Fatigue Crack Growth
,” Eng. Fract. Mech.
, 14
, pp. 467
–475
.14.
Fleck
, N.A.
, 1985
, “Fatigue Crack Growth Due to Periodic Underloads and Periodic Overloads
,” Acta Metall.
, 33
, pp. 1339
–1354
.15.
Fleck, N.A., 1988, “Influence of Stress State on Crack Growth Retardation,” Basic Questions in Fatigue: Volume 1, ASTM STP924, J.T. Fong and R.J. Fields, eds., American Society for Testing and Materials, Philadelphia, PA, pp. 157–183.
16.
Wheeler
, O.E.
, 1972
, “Spectrum Loading and Crack Growth
,” ASME J. Basic Eng.
, American Society of Mechanical Engineers, 4
, pp. 181
–186
.17.
Willenborg, J., Engle, R.M., and Wood, H.A., 1971, “A Crack Growth Retardation Model Using an Effective Stress Concept,” Technical Memorandum 71-1-FBR, Air Force Flight Dynamics Laboratory, Wright Patterson Air Force Base.
18.
Tanaka, K., Matsuoaka, S., Schmidt, V., and Kuna, M., 1981, “Influence of Specimen Geometry on Delayed Retardation Phenomena of Fatigue Crack Growth in HT80 Steel and A5083 Aluminum Alloy,” Advances in Fracture Research, Proceedings, Fifth International Conference on Fracture, France, D. Francois, et al., eds., Pergamon Press, UK., 4, pp. 1789–1798.
19.
Paris, P.C., and Herman, L., 1982, “Twenty Years of Reflection on Questions Involving Fatigue Crack Growth,” Proceedings of the First International Symposium on Fatigue Thresholds, 1, J. Backlund, et al., eds., EMAS Publications, Warley, UK, pp. 3–32.
20.
Bucci, R.J., Thakker, A.B., Sanders, T.H., Sawtell, R.R., and Staley, J.T., 1980 “Ranking 7xxx Aluminum Alloy Fatigue Crack Growth Resistance Under Constant Amplitude and Spectrum Loading,” Effect of Load Spectrum Variables on Fatigue Crack Initiation and Propagation, ASTM STP714, American Society for Testing and Materials, Philadelphia, PA, pp. 41–78.
21.
Forn, A., Martı´n, E., and Nogue´, R., 2000, Proceedings of the Eighth National Congress on Heat Treatment Surface, pp. 159–166.
22.
Bruzzi
, M.S.
, McHugh
, P.E.
, Rourke
, F.O.
, and Linder
, T.
, 2001
, “Micromechanical Modelling of the Static and Cyclic Loading of an Al 2124-SiC MMC
,” Int. J. Plast.
, 17
(4
), pp. 565
–599
.23.
Martı´n
, E.
, Forn
, A.
, and Nogue´
, R.
, 2003, “Strain Hardening Behavior and Temperature Effect on Al-2124/SiCp,” Theor. Comput. Fluid Dyn., in Press.24.
Bruzzi, M.S., 2000, “Development of Models to Predict the Mechanical Response of Aluminum and Aluminum Matrix Composites in Static and Fatigue Loading,” Ph.D. Thesis, National University of Ireland, Galway.
25.
Tabernig, B., and Pippan, R., 2000, Brite-Euram MISPOM Project Working Paper ESI/WP/1/5 dated 25 January 2000.
26.
Heitmann, H.H., Vehoff, H., and Neumann, P., 1984, “Advance in Fracture Research’84,” Proceedings of ICF 6, S.R. Valluri, Pergamon Press, Oxford, UK, pp. 3599–3606.
27.
Newman, J.C., 1976, “A Finite Element Analysis of Fatigue Crack Closure,” Mechanics of Fatigue Crack Growth, ASTM STP590, American Society for Testing and Materials, Philadelphia, PA, pp. 281–301.
28.
McClung, R.C., Chell, G.G., Russel, D.A., and Orient, G.E., “A Practical Methodology for Elastic-Plastic Fatigue Crack Growth,” Fatigue and Fracture Mechanics, 27, ASTM STP 1296, R.S. Piascik, J.C., Newman, and N.E. Dowling, eds., American Society for Testing and Materials, pp. 317–337.
29.
Kubo
, S.
, Yafuso
, T.
, Nohara
, M.
, Ishimaru
, T.
, and Ohji
, K.
, 1989
, “Investigation of Path-Integral Expression of the J-Integral Range Using Numerical Simulations of Fatigue Crack Growth
,” ISME International Journal
, Series I, 32
, pp. 237
–244
.30.
Romaniv, O., Siminkovich, V.N., and Tkach, A.N., 1981, Fatigue Thresholds, J. Backlund, A.F. Blom, and C.J. Beevers, eds., EMAS, Warley, UK, pp. 588–594.
31.
Tanaka, K., and Akinawa, Y., 1988, Engineering Fracture Mechanics, 30, pp. 863–876.
32.
Pippan, R., Berger, M., and Stuwe, H.P., 1987, Metallurgical Transactions, 18a, pp. 429–435.
33.
Pineau, A., 1986, in Proceedings: Small Fatigue Cracks, R.O. Ritchie and J. Lankford, eds., AIME, pp. 191–212.
34.
MISPOM Final Report, EU BRITE/EURAM Project No. BRPR-CT97-0396.
35.
Tabernig, B., and Pippan, R., 1999, Brite-Euram MISPOM Project Working Paper ESI/WP/2/9 dated 25 November 1999.
Copyright © 2004
by ASME
You do not currently have access to this content.
