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Long‐term hydrostatic strength characteristics of thermoplastics pipe
Author(s) -
Reinhart Frank W.
Publication year - 1966
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760060403
Subject(s) - materials science , hydrostatic equilibrium , hydrostatic test , ultimate tensile strength , hydrostatic pressure , hydrostatic stress , stress (linguistics) , internal pressure , composite material , thermoplastic , structural engineering , mechanics , engineering , linguistics , philosophy , physics , quantum mechanics , finite element method
A method for developing long‐term hydrostatic design stresses, defined as the estimated tensile stress in the wall of the pipe in the circumferential orientation due to internal hydrostatic pressure that can be applied continuously with a high degree of certainty that failure of the pipe will not occur, for thermoplastic pipe materials is described. The background information used to develop this method, data to confirm its validity, and several of its more important peculiarities are presented and discussed. The method treats hydrostatic stress–failure time test results by the method of least squares with time as the dependent variable. The long‐trem performance of thermoplastic pipe materials is evaluated by stresses calculated for periods of 100,000 hours (11.43 years) and 50 years.