Prediction of Service Life for Assembly with Time-variant Deviation

4th International Conference on Manufacturing and Industrial Technologies

机械制造;工业技术

Zeng, Wenhui^1 ; Rao, Yunqing^1 ; Long, Chenxi^1 ; Wang, Peng^1

State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan

430074, China^1

关键词: Dimension tolerances;    Friction and wear;    Jacobians;    Mechanical performance;    Prediction model;    Time variant;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/212/1/012021/pdf
DOI  :  10.1088/1757-899X/212/1/012021

学科分类：工业工程学

来源: IOP

【 摘 要 】

During operation, the time-variant deviations, such as deformation, thermal expansion, friction and wear always occur and affect the mechanical performance and service life of assembly. In this paper, a methodology for the prediction of service life for assembly with time-variant deviations is proposed. Firstly, based on the modified Unified Jacobian-Torsor model and Monte Carlo simulation, according to the distribution the geometric and dimension tolerances are randomly generated to limit the variations of surface of part. Secondly, the deformations caused by load and thermal expansion are obtained by finite element analysis, and considering the friction and wear, the prediction model of service life is constructed subject to the constraints. At last, an application is given to illustrate the prediction model, and the influences of time-variant deviations on the assembly deviation and service life are analyzed.