Loading patent…
AssigneesArkema France, Technip France
InventorsGilles Hochstetter, Lionel Hugon, Frédéric Demanze, Stéphanie Pignoc-Chicheportiche
Estimating the term…
The invention relates to a method for evaluating the fatigue life of a polymer composition, including the following steps: i) providing a polymer composition; ii) manufacturing a plurality of axisymmetric test tubes cut from said composition; iii) subjecting said test tubes to a uniaxial traction fatigue test including a plurality of loading and unloading cycles for the test tube, the geometry of the test tube making it possible to subject the material to triaxial stresses, in the area of the test tube cut, simulating the stress conditions for the pressure sheath of a flexible pipe, particularly for off-shore use; and iv) predetermining the number of cycles until the rupture of said polymer composition. The invention is related to the use of said polymer composition selected through the predetermining method for manufacturing pipes or conduits to convey a pressurized and/or corrosive fluid.
A process for evaluating the fatigue life of a polymer composition comprising the following steps:
A method for simulating the triaxial stresses of a polymer material, in particular that goes into the composition of a pressure sheath for a flexible pipe intended for an offshore use, in which a notched axisymmetric test specimen is subjected to a tensile fatigue test comprising several loading and unloading cycles of the test specimen.
Dependencies are inferred from the claim text.