Material damage tolerance detection device based on rotating bending fatigue as well as detection method

Abstract

The invention discloses a material damage tolerance detection device based on rotating bending fatigue as well as a detection method. The detection device comprises a rack, a supporting and rotating device, a driving and regulating device, a Z-axis moving device, a loading device and a crack information acquiring device, wherein the supporting and rotating device comprises a motor and a support axle movably mounted on a support and connected with a power output end of the motor, and a support wheel is fixedly mounted on the support axle; the crack information acquiring device comprises a cracking piece, a wireless signal transmitting module for providing excitation voltage for the cracking piece and acquiring potential signals fed back by the cracking piece as well as a wireless signal receiving module communicating with the wireless signal transmitting module; the driving and regulating device comprises a sliding structure movably mounted on the Z-axis moving device and a servo electric cylinder mounted on the Z-axis moving device, an electric spindle and a shaft box which are integrally connected are mounted on the sliding structure, a hydraulic chuck for clamping a sample shaft is mounted on an output shaft of the shaft box, and a sample wheel in rolling fit with the support wheel is mounted at an end part of the sample shaft.

Description

technical field [0001] The invention relates to the technical field of material detection, in particular to a material damage tolerance detection device and detection method based on rotational bending fatigue. Background technique [0002] Fatigue refers to the process in which materials and parts gradually produce local permanent cumulative damage in one or several places under the action of cyclic stress or cyclic strain, and cracks or sudden complete fracture occur after a certain number of cycles. Fatigue phenomena widely exist in all aspects of modern industry. With the development of science and technology, the problem of fatigue strength has become an important factor affecting the safety and reliability of engineering fields, which has attracted widespread attention of experts and scholars. As a typical component failure form, rotating bending fatigue is a complex fatigue coupled by multiple single modes (such as bending fatigue, tension-compression fatigue, torsion...

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Problems solved by technology

[0003] At present, the research on fatigue test and damage tolerance at home and abroad is mainly to study structural materials through independent test or testing equipment, and there is a lack of test and testing devices that combine rotating bending fatigue tests and damage tolerance research on materials.

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