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


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.


Polymer Fatigue Polyethylene Liquid Nitrogen Life Time 
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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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