Advances in Materials Science and Applications          
Advances in Materials Science and Applications(AMSA)
ISSN:2306-9325(Print)
ISSN:2306-9317(Online)
Website: www.academicpub.org/amsa/
A Method for Detecting an Unexpected Application of a Hazardous Load During Operation
Full Paper(PDF, 870KB)
Abstract:
A method for detecting the application of an unexpected dangerous load was investigated. An acceleration behavior of crack growth due to the application of overload and or underload during fatigue crack growth test with constant stress amplitude was observed. In some cases, the acceleration of crack growth brings catastrophic failure in machine structure. Therefore, it is useful for machine maintenance to know whether an unexpected load was applied or not by doing a daily inspection. In the present study by using center-crack specimen, a simple method of detecting the application of overload or underload was investigated. Such an unexpected load can be detected by the waveform of the function of stress and strain in the vicinity of the crack.
Keywords:Fatigue; Acceleration of Crack Growth; Dangerous Load; Detecting Method
Author: S.M. Moshiar Rahman1, Md. Shafiul Ferdous2, Konosuke Tada1, Chobin Makabe3
1.Graduate School of Science and Engineering, University of the Ryukyus, Okinawa 903-0213, Japan
2.Mechanical Engineering Department, Bangladesh Army University of Science and Technology, Saidpur-5310, Bangladesh
3.Department of Engineering, University of the Ryukyus, Okinawa 903-0213, Japan
References:
  1. W. Elber, “The Significance of Fatigue Crack Closure,” ASTM STP 486. ASTM International, West Conshohocken, pp. 230-242, PA, 1971.
  2. A. J. McEvily, “Current aspects of fatigue,” Metal Science, vol. 11(1077), pp. 274-284, 1977.
  3. A. J. McEvily and Z. Yang, “The nature of the two opening levels following an overload in fatigue crack growth,” Metallurgical Transactions, vol. 21A, pp. 2717-2727, 1990.
  4. H. Bao and A.J. McEvily, “The effect of overload on the rate of crack propagation under plane strain conditions,” Metallurgical and Materials Transactions, vol. 26A, pp. 1725-1733, 1995.
  5. D. H. Chen and H. Nisitani, “Analytical and experimental study of crack closure behavior based on an S shaped unloaded curve,” ASTM STP 982, Mechanics of Fatigue crack Closure, pp. 475-488, 1988.
  6. C. M. Ward-Close, A.F. Blom, and O. R. Richie, “Mechanism associated with transient fatigue crack growth under variable-amplitude loading: an experimental and numerical study,” Engineering Fracture Mechanics, vol. 32, pp. 613-618, 1989.
  7. C. Makabe, A. Purnowidodo, and A. J. McEvily, “Effects of surface deformation and crack closure on fatigue crack propagation after overloading and underloading,” International Journal of Fatigue, vol. 26, pp. 1341-1348, 2004.
  8. C. Makabe, A. Purnowidodo, T. Miyazaki, and A. J. McEvily, “Deceleration and acceleration of crack propagation after an overload under negative baseline stress ratio,” Journal of Testing and Evaluation, vol. 33, pp. 181-187, 2005.
  9. C. Makabe and H. Kaneshiro, “A method of detecting the fatigue crack initiation and growth in a holed specimen based on crack tip opening and closing,” Engineering Fracture Mechanics, vol. 41, pp. 395-403, 1992.
  10. C. Makabe, H. Kaneshiro, S. Nishida, and C. Urashima, “Detection of 1 mm fatigue crack initiation using strain waveform,” Journal of Engineering Materials and Technology, ASME, vol. 116, pp. 483-487, 1994.
  11. C. Makabe, A. Purnowidodo, T. Sueyoshi, and T. Utsunomiya, “Detecting overload from strain information during fatigue crack propagation under negative stress ratio,” Testing and Evaluation, vol. 32, pp. 56-61, 2004.
  12. M. Kikukawa, M. Jono, K. Takaka, and M. Takatani, “Measurement of fatigue crack propagation and crack closure at low stress intensity level by unloading elastic compliance method,” Journal of the Society of Materials Science Japan, vol. 25, pp. 899-903, 1976.
  13. S. Nishida, Failure Analysis in Engineering Applications, Butterworth Heinemann Ltd., pp. 1-5, 1992.
  14. A. J. McEvily, Metal Failures Mechanisms, Analysis, Prevention, Wiley Interscience Publication, pp. 1-20, 2002.
  15. C. Makabe, K. Naka, and Y. Katsushima, “Example of arresting crack growth in welded parts,” Industrial Engineering & Management, vol. 4, pp. 1-4, 2015.