Fracture mechanics global approach concepts applied to creep slow crack growth in a medium density polyethylene (MDPE) |
| |
Authors: | H Ben Hadj Hamouda R Piques |
| |
Affiliation: | Centre des Matériaux, Mines Paris Paristech, CNRS UMR 7633, BP 87, 91003 Evry Cedex, France |
| |
Abstract: | Creep fracture by slow crack growth is studied in a medium density polyethylene at 60 °C and 80 °C. Whereas elastic-plastic fracture mechanics load parameters fail to provide a unique temperature-independent correlation, that of the fracture mechanics for creeping solids C∗ is proved to be relevant since this parameter correlates very well with the time to failure. Correlation established on both full notched creep tensile and double edge notched tensile tests was validated on cracked gas-pipe samples tested under hydrostatic pressure, extending the use of time to failure versus C∗ diagram to predict lifetime of engineering components. |
| |
Keywords: | Polymers Fracture mechanics C&lowast -integral Creep crack growth Failure assessment |
本文献已被 ScienceDirect 等数据库收录! |