A Study on Finite Element Analysis and Aging Test for Automotive Grommet

Lee, Seong-Beom; Yeom, Sanghoon; Han, Chang-Yong; Woo, Chang Su

doi:10.7473/ec.2012.47.3.201

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…2(a). The finite element analysis is executed to obtain the relationship between the displacement and strain [6]. It was assumed that the ends of the specimen were constrained by bonding to the fitting and the rubber part was deformed in the longitudinal direction.…”

Section: Fatigue Test Specimenmentioning

confidence: 99%

Effects of maximum strain and aging time on the fatigue lifetime of vulcanized natural rubber

Woo¹,

Park²

2015

Materials Characterisation VII

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Fatigue life prediction and evaluation are the key technologies to assure the safety and reliability of automotive rubber components. In this study, a fatigue lifetime prediction equation was derived to exactly estimate the fatigue lifetimes of anti-vibration rubber components in a short period at the initial stage of design. A fatigue lifetime prediction methodology of vulcanized natural rubber was proposed by incorporating the finite element analysis and fatigue damage parameter determined from the fatigue test. Nonlinear finite element analyses of the 3-dimensional dumbbell specimen and rubber component were performed using an Ogden hyper-elastic material model determined from the tensile, shear and biaxial tension tests of the natural rubber, and resulted in relationships between displacement and the Green-Lagrange strain for both the dumbbell specimen and rubber component. Fatigue tests were performed using a 3-dimensional dumbbell specimen at different levels of maximum displacement and heat aging temperature. It was shown that the maximum tension displacement was a proper damage parameter, taking the mean displacement effect into account. A procedure to predict the fatigue lifetime of vulcanized natural rubber material based on the maximum strain method was proposed. With the proposed fatigue lifetime equation, the fatigue lifetime could be exactly estimated within the error range of 200%, irrespective of rubber material and aging time.

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Section: Fatigue Test Specimenmentioning

confidence: 99%

Effects of maximum strain and aging time on the fatigue lifetime of vulcanized natural rubber

Woo¹,

Park²

2015

Materials Characterisation VII

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“…Ethylene propylene diene methylene (EPDM) rubber exhibits excellent ozone resistance but poor oil resistance, and it cannot be used in applications wherein it comes into contact with oil [4,5]. A grommet is one of many products made using EPDM rubber, and it is one of the main parts of automobiles that fixes and protects the wire harness from the outside to the inside of the vehicle [6]. A grommet is manufactured via injection molding of EPDM rubber, and the mounting force is changed according to the mechanical properties of EPDM [7,8].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Accelerator Mixing Ratio for EPDM Rubber Grommet to Improve Mountability Using Mixture Design

Kim

Kim²,

Jeon

2019

Applied Sciences

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A grommet, made of ethylene propylene diene methylene (EPDM) rubber, is an integral part used for fixing and protecting the wire inserted from the outside to the inside of vehicles. Rubber compounds exhibit various mechanical properties and vulcanization characteristics depending on the accelerator mixing ratio. These mechanical properties affect the insertion and detachment forces when the grommet is manufactured and fixed to the vehicle body. In this study, we experimentally analyzed the changes in the properties of EPDM rubber depending on the vulcanization accelerator to improve the mounting performance of the grommet, and subsequently derived the optimum accelerator mixing ratio. We implemented a mixture design strategy to derive the optimum mixing ratio for obtaining the desired mechanical properties and vulcanization characteristics. The insertion and separation forces of the existing grommet were compared with those of the grommet fabricated using the derived mixing ratio and we found that the mounting performance was improved compared to the existing grommet.

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Study on Basic Principles of Operation Noise of Wiper System on Vehicle

Kong¹,

Lee²,

Park³

2019

SAE Int. J. Adv. & Curr. Prac. in Mobility

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<div class="section abstract"><div class="htmlview paragraph">The wiper system consists of a motor, linkage, arm, and blade, which provides a clear front view to the driver by removing rain, snow, and foreign matter from the windshield glass. It is a system component that requires a robust design to meet system rigidity, scrubbing performance, and operating noise to any external conditions to provide the driver with a front view. In recent years, however, customer complaints about wiper noise have increased as automobile engine and noise levels have decreased. Based on the analysis of wiper noise, this paper presents quantitative judgment criteria for various wiper noises. In addition, we predict the change of wiper noise to environmental factors through the sound field analysis and propose the solution.</div></div>

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A Study on Finite Element Analysis and Aging Test for Automotive Grommet

Cited by 4 publications

References 7 publications

Effects of maximum strain and aging time on the fatigue lifetime of vulcanized natural rubber

Effects of maximum strain and aging time on the fatigue lifetime of vulcanized natural rubber

Optimization of Accelerator Mixing Ratio for EPDM Rubber Grommet to Improve Mountability Using Mixture Design

Study on Basic Principles of Operation Noise of Wiper System on Vehicle

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