Method for detecting temporally varying thermomechanical stresses and/or stress gradients over the wall thickness of metal bodies

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United States of America Patent

PATENT NO 9903840
APP PUB NO 20160003780A1
SERIAL NO

14771162

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Abstract

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The present invention relates to a method for detecting temporally varying thermomechanical stresses and/or stress gradients over the wall thickness of metal bodies, in particular pipelines. In the method, the temperature on the outer surface of the body is measured in order to determine a temperature progression and stress progression therefrom. In addition, electromagnetic ultrasonic transducers are used at at least one measuring point on the outer surface in order to determine the progression of the stresses and/or stress gradients over time over the wall thickness of the body in conjunction with the result of the temperature measurement. The method allows the fatigue monitoring of pipelines even in the event of rapid stress changes.

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Patent Owner(s)

Patent OwnerAddress
FRAMATOME GMBH91052 ERLANGEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Altpeter, Iris Saarbrücken, DE 2 6
Bergholz, Steffen Erlangen, DE 1 6
Dobmann, Gerd Dudweiler, DE 4 19
Hübschen, Gerhard Saarlouis, DE 2 6
Herrmann, Hans-Georg Saarbrücken, DE 15 160
Kurz, Jochen Saarbrücken, DE 3 7
Rudolph, Jürgen Erlangen, DE 1 6
Tschuncky, Ralf Saarbrücken, DE 1 6

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