Modelling of hyperelastic polymers for automotive lamps under random vibration loading with proportional damping for robust fatigue analysis 机翻标题: 暂无翻译,请尝试点击翻译按钮。

会议集名/来源
22nd European Conference on Fracture: Loading and Environmental Effects on Structural Integrity: ECF 22, Belgrade, Serbia, 26-31 August 2018, Part 2 of 3
出版年
2019
页码
1460-1469
会议地点
Belgrade
作者单位
Department of Mechanical Engineering and Mathematical Sciences, Oxford Brookes UniversityDepartment of Mechanical Engineering and Mathematical Sciences, Oxford Brookes UniversityDepartment of Mechanical Engineering and Mathematical Sciences, Oxford Brookes UniversityDepartment of Mechanical Engineering and Mathematical Sciences, Oxford Brookes UniversityWipac Ltd
作者
C. P. Okeke;A. N. Thite;J. F. Durodola;N. A. Fellows;M. T. Greenrod
摘要
The objective of this paper was to model random vibration response of components of an automotive lamp made of Polycarbonate/Acrylonitrile Butadiene Styrene (PC-ABS), Polymethyl methacrylate (PMMA) and Polypropylene 40% Talc filled (PPT40) materials using a nonlinear hyperelastic model. Traditionally, the Rayleigh damping matrix used in the dynamic response analysis is constructed considering linear elastic behaviour based on either initial stiffness or secant stiffness. The performance of linear stiffness matrices is compared in this work with that based on the nonlinear hyperelastic, Mooney-Rivlin model, specifically addressing Rayleigh damping matrix construction. The random vibration responses of 10 samples of each material are measured. The mean square error of acceleration response was used to assess the effectiveness. Considering three materials of study, the hyperelastic model resulted in the reduction of the least square error at best by 11.8 times and at worst by 2.6 times. The Mooney-Rivlin material model based Raleigh damping matrix was more accurate in modelling the dynamic behaviour of components of nonlinear materials and it also represented the manufacturing variabilities more reliably.
机翻摘要
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关键词
Hyperelastic;Mooney_Rivlin;Material models;Nonlinear stress-strain;Simulation;Modelling;Proportional damping;Rayleigh;Transient analysis;Random vibration;Manufacturing variations
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