A model for service life of polyethylene pipe exhibiting ductile–brittle transition in failure mode
✍ Scribed by George C. Derringer
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 437 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
This article proposes a model for predicting failure time of stressed polyethylene pipe materials that exhibit a failure mode transition from brittle to ductile as stress is increased. The model is based on data obtained using the constant tensile load (CTL) test and takes into account stress-versus-failure-time behavior in both brittle and ductile regimes, as well as in the transition regime. The model permits quantification of the ductile-brittle transition behavior not only from the standpoint of the location of the transition but also its breadth. It is illustrated that knowledge of these two separate parameters opens new avenues for understanding the molecular basis of the transition process. This research was conducted under the sponsorship of