Fatigue life prediction and optimum topology design of EPDM weather strip

Cho, Jin-Rae; Han, Kyungseok; Kim, J. S.; Lee, S. B.; Lim, O-Kaung

doi:10.1016/j.finel.2012.06.001

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…The inverse method is generally used for curve fitting the strain-stress curve for tensile specimens [21][22][23][24]. By defining the property values used in FEA through the inverse method, the thickness, geometry, and analysis conditions of the finite element model can be varied to enhance product performance [25]. However, the performance of rubber parts cannot be sufficiently expressed by elasticity alone.…”

Section: Introductionmentioning

confidence: 99%

Numerical Estimation of Bonding Force of EPDM Grommet Parts with Hollow Shaft Geometry

2020

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A grommet is a representative component that fixes the position of a cable. It is made from hyper-elastic materials (rubber), such as ethylene propylene diene monomer (EPDM). The grommet and cable are conventionally fixed through bonding; however, this method has numerous disadvantages that can be improved through relevant research. To apply a fixing method using the elastic force of EPDM rubber, this paper presents an empirical equation for approximating the bonding force of EPDM grommet parts with a hollow shaft geometry. First, tensile tests and the inverse method were used to approximate the basic mechanical properties. The physical properties were derived through basic tests; furthermore, bonding force tests and the inverse method were used on a grommet with a hollow shaft structure. In addition, the Box–Behnken design of experiments was used to predict the amount of change in the bonding force according to the geometry variables. Finally, this study was validated by comparing the approximation results derived through the design of experiments with the analysis and bonding force test results.

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Section: Introductionmentioning

confidence: 99%

Numerical Estimation of Bonding Force of EPDM Grommet Parts with Hollow Shaft Geometry

2020

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“…Uniaxial tension and creep tests were conducted to obtain the material data. The lab test for the permanent deformation was accelerated at high temperature during shorter time of 300 h. Cho et al 6 predicted the fatigue life of automobile weather-strip manufactured with ethylene-propylene-diene monomer (EPDM) rubber by making use of the nonlinear FEA and an ε–N curve of EPDM rubber. In order to enhance the fatigue life of the initial weather-strip design, the density-based topology optimization was employed to optimally tailor the weather-strip cross section by restricting the deformation of weather-strip within a linear elastic range.…”

Section: Introductionmentioning

confidence: 99%

Analysis and structure optimization on buckling destabilization and wrinkling of an automobile weather-strip seal in assemblage

Zhu

Zhang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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Buckling destabilization and wrinkling of an ethylene-propylene-diene monomer automobile weather-strip seal in assemblage and its structural optimization were studied in this paper. First, an innovative approach that traces buckling bifurcation paths was developed based on an arc-length method, and algorithmic parameters of the method were defined. A finite element analysis model of the automobile weather-strip seal in assemblage was then developed and analyzed using the arc-length method. The maximum buckling load, the deformation of the seal, and the thickness decrease of the lower tube wall in the critical region where it was prone to wrinkle were obtained by this finite element analysis method. Finally, an optimization seal structure was proposed and analyzed, and the deformations and the thickness decrease of the original and optimal structures in the critical regions were compared. The analysis conclusion implies that the optimal structure is more stable. The proposed analysis and optimization method can shorten the product design cycle, improve the structural stability, and decrease the design and trial-product cost considerably.

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“…The prediction of fatigue life of rubber aging has also been studied by domestic and foreign scholars. Cho et al [23] used a combination of nonlinear finite element and ε − N methods to predict the fatigue life of EPDM, Lay et al [24] studied the aging life of EPDM seals in complex environments by accelerated aging tests and Arrhenius method, and Koemmling et al [25] used time and temperature conversion and Arrhenius method to predict the life of O-ring seals.…”

mentioning

confidence: 99%

Rubber aging life prediction based on interpolation and improved time-temperature superposition principle

Chen

Shi

2022

Mater. Res. Express

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With focus on quickly and accurately predicting and evaluating the aging performance degradation of rubber at room temperature, the pseudo-failure life at each different acceleration temperature is proposed to be calculated by interpolation method based on indoor high temperature accelerated aging data, and on the basis of the obtained pseudo-failure life.By introducing the time–temperature equivalence principle, a shift factor obeying to an Arrhenius law is derived, and master curves are built as well for the compression set as for the ultimate mechanical properties.The concept of the sum of squares of dispersion coeﬀicient errors is proposed to evaluate the prediction accuracy.Meanwhile a quantitative calculation method that considers the effect of temperature on the performance degradation curve and the shift factor is innovatively proposes.The results show that the proposed optimization method based on the traditional time-temperature superposition principle can quickly process the aging life at room temperature, and the prediction results are distributed within the 3-fold dispersion line, which can well meet the engineering requirements. The reduction of the DSC value from 1.4164 to 1.0828 further demonstrates the effectiveness of the proposed method above. This method can provide some reference for other related polymer materials accelerated aging data processing and life prediction.

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Fatigue life prediction and optimum topology design of EPDM weather strip

Cited by 6 publications

References 19 publications

Numerical Estimation of Bonding Force of EPDM Grommet Parts with Hollow Shaft Geometry

Numerical Estimation of Bonding Force of EPDM Grommet Parts with Hollow Shaft Geometry

Analysis and structure optimization on buckling destabilization and wrinkling of an automobile weather-strip seal in assemblage

Rubber aging life prediction based on interpolation and improved time-temperature superposition principle

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