Effect of Elevated Temperature on Bending Fatigue Behavior for Neat and Reinforced Polyamide 6,6

Authors

  • Orhan Sabah Abdullah Mechanical Engineering department/ University of Technology
  • Shaker S. Hassan Mechanical Engineering Dept., University of Technology, Baghdad-Iraq.
  • Ahmed N. Al-khazraji Mechanical Engineering Dept., University of Technology, Baghdad, Iraq.

DOI:

https://doi.org/10.29194/NJES.23030232

Keywords:

CNTs, High Cycle Fatigue, Polyamide 6,6, Short Carbon Fibers

Abstract

Recently, considering polymer composite in manufacturing of mechanical parts can be caused a fatigue failure due to the very long time of exposure to cyclic loading and may at environmental temperatures higher than their glass transition temperature; therefore, in this paper, a comprehensive investigation for bending fatigue behavior at room and elevated temperatures equal to 60 °C, 70°C, and 80 °C will be done. Rotating bending test machine was manufactured for this purpose supplied with a connected furnace to perform fatigue tests at elevated temperatures. The obtained results appeared that the increase in applied stress and temperature caused a clear reduction in fatigue life; also the addition of carbon nanotubes enhanced the fatigue life at different temperatures by 183%, 205%, 218%, and 240%, respectively while the addition of short carbon fibers improved fatigue life by 324%, 351%, 387%, and 415%, respectively. As well as, Polyamide 6,6/carbon fiber composite appeared fatigue limit at temperatures equal to 20°C and 60°C and stresses approximately equal to 55 MPa and 38 MPa respectively.

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Published

13-11-2020

How to Cite

Abdullah, O. S., Hassan, S. S., & Al-khazraji, A. N. (2020). Effect of Elevated Temperature on Bending Fatigue Behavior for Neat and Reinforced Polyamide 6,6. Al-Nahrain Journal for Engineering Sciences, 23(3), 232–237. https://doi.org/10.29194/NJES.23030232