Fracture toughness evolution of a carbon/carbon composite after low-cycle fatigue

Despite of improvement of wheel material for railway vehicle, the damages of railway wheel have been occurred in service running. Because of wheel damage with spalling, shelling and thermal crack, the maintenance cost for the railway wheel has increased. The railway wheel had standardized but the chemical composition, the mechanical property and the hardness with respect to railway wheel is merely established. In order to reduce wheel damage, it is necessary to reinforce the standard of railway wheel. In present study, the fracture mechanics characteristics of railway wheel such as low cycle fatigue, fracture toughness, impact energy depended on low temperature and so on have tested. The result shows that the standard of railway wheel has to supplement fracture toughness and impact energy depended on low temperature etc.

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Fracture toughness and low cycle fatigue of 6061/Al2O3p composites Hung, N.P., Zhou, W., Peh, E.T. and Chan, C.S. Compos. Eng. (1995) 5 (5), 509–517

International Journal of Fatigue ◽

10.1016/s0142-1123(97)83270-7 ◽

1997 ◽

Vol 19 (3) ◽

pp. 263

Keyword(s):

Fracture Toughness ◽

Low Cycle Fatigue ◽

Cycle Fatigue

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Tensile, low cycle fatigue and fracture toughness behaviour of type 316L steel irradiated to 0.3 dpa

Journal of Nuclear Materials ◽

10.1016/0022-3115(94)90116-3 ◽

1994 ◽

Vol 212-215 ◽

pp. 525-529 ◽

Cited By ~ 7

Author(s):

Bertil Josefsson ◽

Ulf Bergenlid

Keyword(s):

Fracture Toughness ◽

Low Cycle Fatigue ◽

Cycle Fatigue ◽

Fatigue And Fracture ◽

Type 316L ◽

316L Steel

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Fracture Toughness of HSLA Coiled Tubing Used in Oil Wells Operations

Journal of Pressure Vessel Technology ◽

10.1115/1.4004569 ◽

2011 ◽

Vol 134 (1) ◽

Cited By ~ 5

Author(s):

J. Wainstein ◽

J. Perez Ipiña

Keyword(s):

Fracture Toughness ◽

Low Cycle Fatigue ◽

Oil Industry ◽

Arc Length ◽

Cycle Fatigue ◽

Steel Tubes ◽

Small Thickness ◽

Coiled Tubing ◽

Thin Walled ◽

Tubing Material

Coiled Tubings are thin walled steel tubes of 25–89 mm diameter and thousands meters long, used in the oil industry for production and maintenance services. They suffer plastic deformation during unwinding of the reel, passing through a goosneck arch guide and an injector unit. Strain levels are of 2–3%, making the tubing fail by low cycle fatigue in around 100 wrap–unwrap cycles. As coiled tubing material generally behaves in a ductile manner at surface and down well temperatures, the R curve has to be known to make instability analyses. J-R curves were determined to characterize the fracture toughness of nonused coiled tubing, using nonstandard specimens due to difficulties with their small thickness and diameters. Different crack lengths and crack locations were tested to analyze the 2C0/W ratio and the influence of the longitudinal weld. The R curves obtained show crack arc length dependence and are influenced by the position of the longitudinal weld.

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