The aim of this paper is to establish a relationship between strain and acceleration, obtained at the center of the specimen, during resonant fatigue test of a full-scale X-65 seamless rigid pipe. The pipe was submitted to five different strain levels. Strain and acceleration on the outer surface of the specimen were measured and recorded using strain gages and accelerometers located at the center of the pipe, which is the point of maximum stress along the pipe structure during the resonant fatigue test. Thus, strain and acceleration values acquired from experimental tests were processed and compared with FEM modeling results. The results obtained by comparison between experimental and FEM modeling data were satisfactory, with a difference of approximately 0.05%. With these results, this work produced a reliable tool to obtain test parameters, considering different pipe geometries, in order to perform further resonant bending tests becoming the acceleration as an alternative to control test frequency instead of strain values.

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