Natural environment degradation prediction of rubber and MPSO-based aging acceleration factor identification through the dispersion coefficient minimisation method

Liu, Qiaobin; Shi, Wenxiao; Chen, Zhiyong

doi:10.1016/j.polymertesting.2019.04.031

Cited by 10 publications

(5 citation statements)

References 21 publications

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“…During the thermal oxygen aging process at the different test temperature of 90°C, 100°C, 110°C, 120°C, respectively, assuming that the RIP is uniformly aged, and the mechanism of the thermal oxygen aging at the test temperature is the same as well, where the activation energy of the reaction E a remains constant and can be obtained by the method given in the literature. 28 From equation (1), the reaction rate at the different temperatures is written as below,…”

Section: Parameter Identification and Experimental Verificationmentioning

confidence: 99%

Research on dynamic characteristic of compressor RIP under thermal oxygen aging and variable preload conditions

Chen

Gan

et al. 2023

Advances in Mechanical Engineering

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The dynamic characteristics of rubber isolation pad (abbreviated as RIP) after service under the high temperature thermal oxygen aging and the variable preloads have preload dependence and thermal oxygen aging dependence, which is a crucial problem for matching the vibration isolation system of air conditioner compressor to reveal the dynamic characteristic mechanism of the RIP with different preloads and thermal oxygen aging conditions. The Peck model is first introduced to characterize the thermal oxygen aging factor, the fractional derivative Kelvin-Voigt thermal oxygen aging-perturbation model (FDKVTPM) and the Coulomb frictional thermal oxygen aging-perturbation model (CFTPM) are established to describe the frequency dependence and the amplitude dependence, respectively. The thermal oxygen aging-dynamic characteristic model of the RIP is built by considering the influence of variable preloads, the model parameters under different preloads are further identified, the validity of the model was examined by the experimental data. The concepts of the stiffness transition point (STP) and the stiffness transition frequency (STF) are innovatively proposed to better describe softening effect of the RIP under variable preload and variable amplitude working conditions. The results show that the static stiffness of RIP increases by 20.7%, the dynamic stiffness increases by 9.3%, and the loss factor decreases by 35% after thermal oxygen aging under different preload conditions, which can lay a theoretical foundation for in-depth study of the stiffness matching and optimization of air conditioner compressor with the RIP.

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Section: Parameter Identification and Experimental Verificationmentioning

confidence: 99%

Research on dynamic characteristic of compressor RIP under thermal oxygen aging and variable preload conditions

Chen

Gan

et al. 2023

Advances in Mechanical Engineering

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“…The activation energy E a can be obtained [39] by the linear line of lnq and 1/T. Equations ( 2), ( 22) and ( 25) were also combined to obtain the acceleration coefficients C 1 , and then these parameters are shown in Table 5.…”

Section: Parameter Identification and Model Validationmentioning

confidence: 99%

Influence Mechanism of Rubber Thermal Oxygen Aging on Dynamic Stiffness and Loss Factor of Rubber Isolation Pad

Chen

et al. 2022

International Journal of Polymer Science

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The influence mechanism of thermal oxygen aging on the dynamic characteristic of the rubber isolation pad (RIP) is usually ignored in studies. However, the ambient temperature of the RIP could reach up to 70°C in general, and even 108°C under some extreme conditions, which will lead to accelerated thermal oxygen aging and a decline in the mechanical performance for the RIP. In the meantime, the thermal oxygen aging will result in excessive vibration and even a damaged external air conditioner. Therefore, the research on the influence mechanism of rubber thermal oxygen aging on the dynamic performances of the RIP is crucial to the mechanical characteristic matching of the RIP. Considering the effect of the thermal oxygen aging on the dynamic characteristic, a novel model of thermal oxygen aging-dynamic characteristic of the RIP is established by adopting the Peck model, the hyperelastic model, the fractional derivative model, and the smooth Coulomb friction model (SCFM) in this paper. A test rig of the static and dynamic characteristics of the RIP is built, and an identification method of model parameters is developed based on the MTS831 elastomer test system as well which of the thermal oxygen aging-dynamic characteristic model is verified by the experimental data. The result is shown that the maximum growth rate of the static stiffness and the dynamic stiffness is 20.7% and 4.5%, respectively, and the maximum decrease rate of the loss factor is 10.6% as the thermal oxygen aging hardness of the RIP increases by 5HA. The amplitude-dependent, frequency-dependent, and thermal oxygen aging-dependent performances of the RIP are effectively characterized by the thermal oxygen aging-dynamic characteristic model. Moreover, a theoretical foundation is provided for the evolution law of the dynamic characteristic of the RIP after the service with the thermal oxygen aging condition in this research.

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“…As expected, these factors were decreased the mechanical properties and the total life of the rubber. Latest investigations on rubber durability were published by [66]- [68] conducted on the key parameter to the accelerated aging fatigue. The work of Ruellan et al [66] focused on the high thermo-sensitive phenomena roles in reinforcing fatigue life and temperature affects to improve the durability of rubbers.…”

Section: Factors Influence Durabilitymentioning

confidence: 99%

“…The accelerated aging test method can predict the lifespan of materials under normal use conditions in a short period and has received extensive attention. Recently studied by Liu et al [68] incorporated the modeling method for parameter identification in the analysis of rubber-accelerated aging test. The data acquired then provides a scientific basis for the prediction of rubber durability.…”

Section: Factors Influence Durabilitymentioning

confidence: 99%

An Overview of Durability Evaluations of Elastomer-Based Magnetorheological Materials

et al. 2020

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Most parts of the failures in structural elements in use were consequences of mechanical durability. Therefore, durability had been one of the critical factors to be considered in designing durable mechanical elements. In magnetorheological elastomer (MRE) materials, the durability process involves different damage mechanisms that result in the degradation of the materials. Increasingly used of outstanding performance of MRE was susceptible to failure under durability performance for various applications. In response to these problems, with limited sources of published articles on MRE durability, an overview of the durability of elastomer based MRE is presented. The study focuses on collecting and analyzing the works including experimental and modeling approaches that have been conducted on MRE durability up to date. Two bibliographic searched databases, Scopus and Web of Science were consulted to collect the final set of articles with the aims to identify current and future trends of MRE durability. Prominence works conducted on MRE durability were also encapsulated in this paper to provide a visual perspective and subsequently motivate researchers to heighten the need for MRE durability investigation.

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Natural environment degradation prediction of rubber and MPSO-based aging acceleration factor identification through the dispersion coefficient minimisation method

Cited by 10 publications

References 21 publications

Research on dynamic characteristic of compressor RIP under thermal oxygen aging and variable preload conditions

Research on dynamic characteristic of compressor RIP under thermal oxygen aging and variable preload conditions

Influence Mechanism of Rubber Thermal Oxygen Aging on Dynamic Stiffness and Loss Factor of Rubber Isolation Pad

An Overview of Durability Evaluations of Elastomer-Based Magnetorheological Materials

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