Journal of Materials Science

, Volume 21, Issue 7, pp 2423–2429 | Cite as

The relationship of the initiation stage to the rate of slow crack growth in linear polyethylene

  • Xici Lu
  • Norman Brown


The rate of notch opening was observed in single-edge notched tension specimens of linear high-density polyethylene under plane strain conditions as a function of applied stress and notch depth. The initial rate of notch opening was 22K4.3μm min−1 (where units ofK are MN m−3/2). The initial rate of notch opening was constant until the opening at its root was 25 to 30μm for all stresses and notch depths. The accelerating part of the notch opening against time curve and the time to failure could be predicted from the initial rate of notch opening. It is concluded that the same mechanism governs the initiation stage and the subsequent crack growth rate.


Initial Rate Applied Stress Plane Strain Strain Condition Crack Growth Rate 
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Copyright information

© Chapman and Hall Ltd. 1986

Authors and Affiliations

  • Xici Lu
    • 1
  • Norman Brown
    • 1
  1. 1.Department of Materials Science and Engineering and Laboratory for Research on Structure of MatterUniversity of PennsylvaniaPhiladelphiaUSA

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