DEVICE FOR CREEP TESTING OF A TUBULAR TEST OBJECT

The invention relates to a creep testing device, characterized in that it comprises - a sample (1) to be tested, tubular and longitudinal, and exhibiting two ends (11), and an internal wall (12), - a tube (2) internal to the sample (1), exhibiting a longitudinal axis (AA), two ends (23), an external wall (22), an interior volume (28), and an axial stiffness along the longitudinal axis (AA) which is less than a radial stiffness, and - two stoppers (3), each stopper (3) fastening an end (11) of the sample (1) and an end (23) of the tube (2), and closing an internal space (5) between the sample (1) and the tube (2) by a surface (Si) between the internal wall (12) of the sample (1) and the external wall (22) of the tube (2), the device making it possible to independently define axial and circumferential stresses to be applied to the sample (1), as a function - on the one hand of the ratio of a pressure (Pt) in the interior volume (28) of the tube (2) to a pressure (Pi) in the internal space (5), and - on the other hand of the ratio of the area of the surface (Si) between the internal wall (12) of the sample (1) and the external wall (22) of the tube (2), at the level of the stoppers (3), to the area of a surface St closing the interior volume 28.