This study addresses the effect of temperature on fatigue crack growth (FCG) behavior of CPVC. FCG tests were conducted on CPVC SEN tensile specimens in the temperature range −10 to 70°C. These specimens were prepared from 4-in. injection-molded pipe fittings. Crack growth behavior was studied using LEFM concepts. The stress intensity factor was modified to include the crack closure and plastic zone effects. The effective stress intensity factor range gave satisfactory correlation of crack growth rate () at all temperatures of interest. The crack growth resistance was found to decrease with temperature increase. The effect of temperature on was investigated by considering the variation of mechanical properties with temperature. Master curves were developed by normalizing by fracture strain and yield stress. All the curves at different temperatures were collapsed on a single curve. Crazing was found to be the dominant fatigue mechanism, especially at high temperature, while shear yielding was the dominant mechanism at low temperatures.
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February 2003
Technical Papers
Effect of Temperature on Fatigue Crack Growth in CPVC
Muhammad Irfan-ul-Haq, Graduate Student,
Muhammad Irfan-ul-Haq, Graduate Student
Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
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Nesar Merah, Associate Professor
e-mail: nesar@kfupm.edu.sa
Nesar Merah, Associate Professor
Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
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Muhammad Irfan-ul-Haq, Graduate Student
Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
Nesar Merah, Associate Professor
Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
e-mail: nesar@kfupm.edu.sa
Contributed by the Pressure Vessels and Piping Division and presented at the Pressure Vessels and Piping Conference, July 22–26, 2001, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the PVP Division, January 25, 2002; revised manuscript received September 9, 2002. Associate Editor: S. Y. Zamrik.
J. Pressure Vessel Technol. Feb 2003, 125(1): 71-77 (7 pages)
Published Online: January 31, 2003
Article history
Received:
January 25, 2002
Revised:
September 9, 2002
Online:
January 31, 2003
Citation
Irfan-ul-Haq, M., and Merah, N. (January 31, 2003). "Effect of Temperature on Fatigue Crack Growth in CPVC ." ASME. J. Pressure Vessel Technol. February 2003; 125(1): 71–77. https://doi.org/10.1115/1.1523070
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