Partial crack closure under block loading
Source abstract
Abstract
Fatigue crack propagation tests under high–low and low–high block loading sequences have been performed in aluminium alloy specimens. The tests were carried out at constant DK conditions. Two stress ratios were analysed: R = 0.05 and R = 0.4. Crack closure was monitored in all tests by the compliance technique using a pin microgauge. The observed transient post load step behaviour is discussed in terms of the load change magnitude, DK baseline levels and stress ratio. The crack closure level was obtained and compared with the crack growth transients. A good agreement between experimental and predicted crack growth rates is obtained when the partial crack closure effect is properly taken into account. Therefore, plasticity-induced crack closure plays an important role on the load interaction effects observed in aluminium alloys. 2008 Elsevier Ltd. All rights reserved.
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Research context
OpenAlex topics: Fatigue and fracture mechanics · Advanced Welding Techniques Analysis · Metal Forming Simulation Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
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1. Mechanisms associated with transient fatigue crack growth under variable amplitude loading: an experimental and numerical study10.1016/0013-7944(89)90195-1 ↗
2. Some aspects of fatigue crack growth retardation behaviour following tensile overloads in a structural steel10.1111/j.1460-2695.1996.tb00958.x ↗
3. The significance of fatigue crack closure
4. On the cyclic behavior of cast and extruded aluminium alloys, Part A: fatigue crack propagation10.1016/0013-7944(83)90113-3 ↗
5. Fatigue crack growth and crack closure in an AlMgSi alloy10.1046/j.1460-2695.2001.00383.x ↗
6. Observations on evaluating fatigue crack closure from compliance traces10.1016/0142-1123(89)90184-9 ↗
7. Crack closure: correlation and confusion
8. Contribution of the cyclic loading portion below the opening load to fatigue crack growth10.1016/0921-5093(95)10079-2 ↗
9. Influence of the overload on the fatigue crack growth in steels10.1111/j.1460-2695.1983.tb01135.x ↗
10. Modelling and measurement of crack closure and crack growth following overloads and underloads10.1016/0013-7944(89)90101-X ↗
11. Influence of stress state on crack growth retardation
12. Effect of specimen geometry on fatigue crack growth in plane strain – II overload response10.1111/j.1460-2695.1990.tb00601.x ↗
13. On the mechanisms and behaviour of overload retardation in AISI 304 stainless steel10.1016/0142-1123(93)90175-P ↗
14. Service load fatigue damage – a historical perspective10.1016/S0142-1123(99)00054-7 ↗
15. An evaluation of ΔKeff estimation procedures on 6061-T6 and 2024-T3 aluminium alloys10.1016/S0142-1123(99)00055-9 ↗
16. A review of crack closure, fatigue crack threshold and related phenomena10.1016/0921-5093(94)90351-4 ↗
17. Analysis of fatigue crack growth and closure near threshold conditions for large-crack behavior
18. Twenty years of reflection on questions involving fatigue crack growth, part II: some observations of crack closure
19. Evaluation of overload effects on fatigue crack growth and closure10.1016/S0013-7944(02)00119-4 ↗
20. Correlation of long- and physically short-cracks growth in aluminium alloys10.1016/S0013-7944(01)00029-7 ↗
21. The effect of load step-down on fatigue crack arrest and retardation10.1016/0142-1123(80)90032-8 ↗
22. Variable amplitude loading in En8 (080M40) steel: a detailed experimental study of crack growth10.1111/j.1460-2695.1996.tb00960.x ↗
23. Analysis of low cycle fatigue in AlMgSi aluminium alloys10.1016/j.engfailanal.2003.09.003 ↗
24. ASTM E 647. Standard test method for measurements of fatigue crack growth rates. In: Annual book of ASTM standards, vol. 03.01. West Conshohocken (PA): ASTM; 2000. p. 591–630.
25. Microstructure dependent fatigue crack growth in aged hardened aluminium alloys10.1016/j.ijfatigue.2004.04.004 ↗
26. A comparison of measurement methods and numerical procedures for the experimental characterization of fatigue crack closure
27. Fatigue crack propagation behaviour under variable amplitude loading
28. The effect of mean stress on delay in fatigue crack growth load stepdown10.1016/0142-1123(84)90020-3 ↗
29. Metallurgical characterization of the fracture of aluminum alloys