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http://dx.doi.org/10.7467/KSAE.2016.24.5.596

Reliability Based Design of the Automotive Components considering Degradation Properties of Polymeric Materials  

Doh, Jaehyeok (School of Mechanical Engineering, Yonsei University)
Lee, Jongsoo (School of Mechanical Engineering, Yonsei University)
Ahn, Hyo-Sang (Polymer Material Team, Hyundai Motor Group)
Kim, Sang-Woo (Polymer Material Team, Hyundai Motor Group)
Kim, Seock-Hwan (Polymer Material Team, Hyundai Motor Group)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.24, no.5, 2016 , pp. 596-604 More about this Journal
Abstract
In this study, we used a stochastic approach for guaranteeing the reliability and robustness of the performance with regard to the design of polymer components, while taking into consideration the degradation properties and operating conditions in automobiles. Creep and tensile tests were performed for obtaining degradation properties. The Prony series, which described the viscoelastic models, were calculated to use the creep data by the Maxwell fluid model. We obtained the stress data from the frequency response analysis of the polymer components while considering the degradation properties. Limit state functions are generated by using these data. Reliability assessments are conducted under the variation of the degradation properties and area of frequency at peak response. For this study, the input parameters are assumed to be a normal distribution, and the reliability under the yield stress criteria is evaluated by using the Monte Carlo Simulation. As a result, the reliabilities, according to the three types of polymer materials in automotive components, are compared to each other and suggested the applicable possibility of polymeric materials in automobiles.
Keywords
Polymer; Viscoelastic model; Frequecy response analysis; Monte carlol simulation; Reliability assessment;
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