Effects of work hardening models on low-cycle fatigue evaluations of coiled tubing with CT-100 steel
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In the present study, low-cycle fatigue life of a coiled tubing (CT) with a CT-100 steel was evaluated by using various work hardening models. Tensile and low-cycle fatigue tests were performed, and experimental results were used to calibrate material model constants. A nonlinear finite element model was constructed in the ABAQUS program by using a CT fatigue test machine. During the test cycles, bending and straightening conditions were repeated and histories of strains were collected. The multiaxial low-cycle fatigue life was calculated by using Manson–Coffin relation and Tresca criterion. The kinematic and combined hardening models can be used to evaluate the fatigue life of CT, and their results are conservative compared with the fatigue test results. Results of the present study can be used as the basic data in establishing CT fatigue analysis.
KeywordsCoiled tubing Life prediction Low-cycle fatigue Work hardening model
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- S. M. Tipton, Multiaxial plasticity and fatigue life prediction in coiled tubing, Fatigue Lifetime Predictive Techniques, ASTM STP 1292, 3 (1996) 283–304.Google Scholar
- X. Tian, H. Zhang, Q. Duan and Y. Ji, Establishment and application of fatigue life prediction models for coiled tubing, Proc. of the ASME 2015 PVP Conference, PVP2015–45130, Boston, Massachusetts, USA (2015).Google Scholar
- K. R. Newman, P. A. Brown and S. Dowell, Development of a stadard coiled–tubing fatigue test, Society of Petroleum Engineers, Proc. of 68th Annual Technical Conference and Exhibition, SPE 26539, Huston, Texas, USA (1993) 303–309Google Scholar
- J. A. Bannantine, J. J. Comer and J. L. Handrock, Fundamentals of metal fatigue analysis, Prentice–Hall, Inc., Upper Saddle River, New Jersey, USA (1990).Google Scholar