Effect of overload on crack closure in thick and thin specimens via digital image correlation
Source abstract
Abstract
The displacement field of compact tension (CT) specimens have been mapped by digital image correlation (DIC) local to growing fatigue cracks to study overload effects for plane stress and plane strain. We have extracted crack opening displacement (Delta COD) and stress intensity (K) determined by a Muskhelishvili fit to the crack tip displacement field to infer the closure load. In both cases a classical knee was observed upon unloading consistent with closure which disappeared during the accelerated growth following OL, before increasing during retardation. In both cases following OL the crack growth rate is perturbed for a distance similar to the plastic zone. (C) 2013 Elsevier Ltd. All rights reserved.
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Research context
OpenAlex topics: Fatigue and fracture mechanics · Non-Destructive Testing Techniques · Ultrasonics and Acoustic Wave Propagation
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References (27)
Show source-provided references
1. Fatigue crack closure under cyclic tension10.1016/0013-7944(70)90028-7 ↗
2. James MN. Some unresolved issues with fatigue crack closure – measurement, mechanisms and interpretation problems. In: Karihaloo BL, (editor). Advances in fracture research, proceedings of the ninth international conference on fracture. Sydney, Australia: Pergamon Press; 1996.
3. Analysis of overload effects and related phenomenon10.1016/S0142-1123(99)00094-8 ↗
4. A comparison of two and three-dimensional analyses of fatigue crack closure10.1016/j.ijfatigue.2006.03.014 ↗
5. Fleck NA. Compliance methods for measurement of crack length. In: Marsh KJ, Smith RA, Ritchie RO, editors. Fatigue crack measurement: techniques and applications. EMAS Publishing; 1991.
6. Donald JK, Ruschau J. Direct current potential difference fatigue crack measurement techniques. In: Marsh KJ, Smith RA, Ritchie RO, editors. Fatigue crack measurement: techniques and applications. EMAS Publishing; 1991.
7. Mechanisms of fatigue crack propagation in metals, ceramics and composites: role of crack tip shielding10.1016/0025-5416(88)90547-2 ↗
8. Strain measurement by digital image correlation: guest editorial10.1111/j.1475-1305.2008.00556.x ↗
9. Some experimental observations on crack closure and crack-tip plasticity10.1111/j.1460-2695.2009.01345.x ↗
10. Optical methods for measurement of fatigue crack closure: moiré interferometry and digital image correlation
11. Investigation of incremental fatigue crack growth mechanisms using in situ SEM testing10.1016/j.ijfatigue.2011.03.004 ↗
12. De Matos PFP, Nowell D. Experimental and numerical investigation of thickness effects in plasticity-induced fatigue crack closure. Int J Fatigue; 2008 [doi:10.1016/j.ijfatigue.2008.12.003].10.1016/j.ijfatigue.2008.12.003 ↗
13. Plastic zone size estimation under cyclic loadings using in situ optical microscopy fatigue testing10.1111/j.1460-2695.2011.01567.x ↗
14. Real-time acquisition of fatigue crack images for monitoring crack-tip stress intensity variations within fatigue cycles10.1243/03093247JSA440 ↗
15. Zhang W, Liu Y. In situ SEM testing for crack closure investigation and virtual crack annealing model development. Int J Fatigue doi:10.1016/j.ijfatigue.2012.04.003.10.1016/j.ijfatigue.2012.04.003 ↗
16. Application of digital image correlation to the investigation of crack closure following overload
17. The effects of overloads in fatigue crack growth10.1016/0142-1123(91)90479-I ↗
18. Overload effects on fatigue crack-tip fields under plane stress conditions: surface and bulk analysis10.1111/j.1460-2695.2012.01670.x ↗
19. Suresh · 1998
20. Rice JR. The mechanics of crack tip deformation and extension by fatigue. In: Symposium on fatigue crack growth, ASTM STP 415. Philadelphia: American Society for Testing and Materials; 1967.10.1520/STP47234S ↗
21. ASTM E647. Standard test method for measurement of fatigue crack growth rates. West Conshohocken, PA, USA: ASTM International; 2000.
22. Rice JR. Mathematical analysis in the mechanics of fracture. In: Liebowitz H., editor. Fracture: an advanced treatise vol. II. Mathematical fundamentals; 1968. p. 191–311.
23. La Vision GmbH, PIV Software Manual: Da Vis. (La Vision GmbH, Gottingen, Germany). www.lavision.de; 1999.
24. Muskhelishvili NI. Some basic problems in the mathematical theory of elasticity. 4th ed., Leyden, the Netherlands: Noordhoff International; 1977.10.1007/978-94-017-3034-1 ↗
25. The stress intensity of mixed mode cracks determined by digital image correlation10.1243/03093247JSA419 ↗
26. Crack-tip stress-intensity factors for plane extension and plate bending problems10.1115/1.3640546 ↗
27. Fundamentals of the phenomenological theory of nonlinear fracture mechanics10.1115/1.3167187 ↗