A New Small Scale Pipe Test For Rapid Crack Propagation

Creative Commons License

Yayla P., Leevers P.

Proc. of the 11th Plastic Fuel Gas Pipe Symposium, California, Amerika Birleşik Devletleri, 01 Ekim 1989 - 05 Ekim 2016, ss.344-353

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: California
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.344-353
  • Marmara Üniversitesi Adresli: Hayır

Özet

Mastering the rapid crack propagation (RCP) problem in plastic pipelines will require both sound material data and an understanding of the many interacting constraints on buried and pressurised pipe. Here we describe a new small scale pipe test designed to sustain steady RCP by artificially suppressing transient finite-length and radial decompression effects, so that the effect of varying other parameters can be studied more easily. This technique sustains RCP above a critical pressure lower than that for full-scale tests or predicted from the Irwin-Corten formula. The critical pressure for a typical pipe material drops sharply between room. temperature and 0°C, and then more gently down to  -15°C. Crack velocity varies systematically with pressure and temperature.