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Journal of Materials Science

, Volume 26, Issue 4, pp 881–888 | Cite as

Notchology-the effect of the notching method on the slow crack growth failure in a tough polyethylene

  • X. Lu
  • R. Qian
  • N. Brown
Papers

Abstract

The effect of various notching methods on the life time of slow crack failure at 80 °C for a tough gas pipe grade of polyethylene was investigated. The standard notching procedure involved pressing an ordinary razor blade into the single-edge notched tensile specimen at a rate of 50 μm min−1 at room temperature. The other notching methods involved using a sharper razor blade, cooling in liquid nitrogen, pre-cracking by fatigue, slicing with a scalpel, or using a rotary cutter. The standard procedure gave a life time of 28000 min under a stress of 2.4 MPa; the sharper blade, cooling in liquid nitrogen, and pre-cracking by fatigue gave an equivalent life time. Slicing with a scalpel or a rotary cutter provided a much longer life time.

Keywords

Polymer Fatigue Polyethylene Liquid Nitrogen Life Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd 1990

Authors and Affiliations

  • X. Lu
    • 1
    • 2
  • R. Qian
    • 1
    • 2
  • N. Brown
    • 1
  1. 1.Department of Materials Science and EngineeringUniversity of PennsylvaniaPhiladelphiaUSA
  2. 2.University of Science and Technology of ChinaAnhuiPeople’s Republic of China

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