A Novel Ultrasonic Fatigue Test and Application in Bending Fatigue of TC4 Titanium Alloy.

ABSTRACT: The very high cycle fatigue (VHCF) problems of thin-plate structures are usually caused by high-frequency vibrations. This paper proposes an accelerated fatigue test method based on ultrasonic loading technology in order to develop a feasible bending testing method and explore the bending fatigue characteristics of thin-plate structures in the VHCF regime. A new bending fatigue specimen with an intrinsic frequency of 20 kHz was designed based on cantilever bending through finite element simulation. It was verified by the axial load test with R = -1. The results showed that the method could effectively transfer the dangerous cross-section at the first-order cantilever bending restraint to the internal part of the specimen, thereby making the fracture location independent of the complex stre

SUBMITTER: Tang S 

PROVIDER: S-EPMC9821665 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature