Development of the fatigue life model for plastic gears of automotive actuators under vibration. (February 2023)

• Record Type: Journal Article
• Authors: Lee, Juyub; Yun, Sangmin
• Is Part Of: Engineering failure analysis. Volume 144(2023)
• Publication Date: 2023-02
• Subjects: Vibration analysis -- Plastic gear -- Basquin equation -- Accelerated life test -- Failure mechanism; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2022.106992
• Languages: English
• ISSNs: 1350-6307

Abstract

Highlights: An accelerated life test method of actuator gears for vehicle based on vibration. Investigation of the vulnerable point using a finite element model under forced vibration. Obtaining the vibration characteristic by performing a resonance frequency analysis. Configuration of vibration test equipment capable of monitoring the time of gear failure. Reliability study of plastic gears approached from the perspective of reliability engineering. Abstract: In this research, a series of analysis and validation were conducted for estimating the fatigue life of plastic gears. A jig for depicting assembly state in vehicle actuators was made based on failure mechanism analysis. A vibration test for detecting the resonance frequency was performed using a frequency range specified in the ISO standard and it is confirmed that a resonance point occurs within a range generated by an engine operation. Finite element analysis was conducted to obtain the maximum stress in the vibration test applied with a sinusoidal sweep signal and the cycles to failure were calculated through the accelerated testing. The fatigue life model for plastic gears was established by deriving an S-N curve on the relation between stress and cycles to failure. The purpose of this study is to propose a design guideline for improving the reliability of vehicle actuators through the establishment of a fatigue life model for the elemental components.