Fatigue of crystallizable rubber: Generation of a Haigh diagram over a wide range of positive load ratios

Champy, C.; Saux, V. Le; Marco, Yann; Glanowski, Thomas; Charrier, Pierre; Hervouet, W.

doi:10.1016/j.ijfatigue.2021.106313

Cited by 12 publications

(9 citation statements)

References 26 publications

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“…Seichter et al [ 25 ] compared the three criteria and finally chose the decrease of effective stiffness as the judgment condition of the end of life. Champy et al [ 26 ] also took the decrease of effective stiffness as the fatigue criterion.…”

Section: Rubber Fatigue Research Methodsmentioning

confidence: 99%

“…The fatigue life of rubber is closely related to its mechanical load. Mechanical loads include tension–tension, tension–compression, compression–compression, tension–torsion and compression–torsion loads [ 26 ].…”

Section: Factors Affecting the Fatigue Life Of Rubbermentioning

confidence: 99%

“…Strain-induced crystallization can greatly improve the fatigue life of rubber materials [ 70 ] because the generated microcrystal structure makes the originally disordered rubber molecular chains orient along the stress direction, thus making the local rubber molecular chains arrange regularly, resulting in stronger fatigue resistance [ 71 ]. Champy et al [ 26 ] established a Haigh diagram of a wide range of positive load ratios based on tensile–tensile load testing. These results emphasized the important role of strain-induced crystallization in the fatigue life of crystalline rubber materials.…”

Section: Factors Affecting the Fatigue Life Of Rubbermentioning

confidence: 99%

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Research Progress on Fatigue Life of Rubber Materials

2022

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Rubber products will be fatigued when subjected to alternating loads, and working in harsh environments will worsen the fatigue performance, which will directly affect the service life of such products. Environmental factors have a great influence on rubber materials, including temperature, humidity, ozone, etc., all of which will affect rubber’s properties and among which temperature is the most important. Different rubber materials have different sensitivity to the environment, and at the same time, their own structures are different, and their bonding degree with fillers is also different, so their fatigue lives are also different. Therefore, there are generally two methods to study the fatigue life of rubber materials, namely the crack initiation method and the crack propagation method. In this paper, the research status of rubber fatigue is summarized from three aspects: research methods of rubber fatigue, factors affecting fatigue life and crack section. The effects of mechanical conditions, rubber composition and environmental factors on rubber fatigue are expounded in detail. The section of rubber fatigue cracking is expounded from macroscopic and microscopic perspectives, and a future development direction is given in order to provide reference for the research and analysis of rubber fatigue and rubber service life maximization.

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Section: Rubber Fatigue Research Methodsmentioning

confidence: 99%

Section: Factors Affecting the Fatigue Life Of Rubbermentioning

confidence: 99%

Section: Factors Affecting the Fatigue Life Of Rubbermentioning

confidence: 99%

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Research Progress on Fatigue Life of Rubber Materials

2022

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“…Fatigue loadings were carried out in displacementcontrolled mode and the fatigue life, N f , was determined by the stiffness decrement criterion, 31,32 in which N f could be regarded as the cycle number when the cyclic maximum force experienced 20% decrement compared to that at the 1000th cycle. All tests were automatically terminated when it meets the criterion.…”

Section: Fatigue Life Testsmentioning

confidence: 99%

Coupling effect of non‐relaxing and high temperature on fatigue properties of carbon‐black filled isoprene rubber

Luo,

Song,

Guo

et al. 2024

J of Applied Polymer Sci

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This paper presents an extensive experimental investigation on fatigue properties of carbon‐black filled isoprene rubber under complex loadings. A basic life prediction model taking strain energy density as fatigue parameter is first proposed based on fatigue crack growth tests and uniaxial tension fatigue tests under relaxing loads at room temperature. A database of fatigue life including relaxing and non‐relaxing is established through a great number of fatigue tests under five temperatures. Based on the database, two empirical parameters, that is, temperature factor (NRT/NHT) and life reinforcement factor (Re), are introduced to quantitatively characterize the coupling effects of high temperature and non‐relaxing loads on fatigue life. The fatigue mechanisms under different conditions are compared via wide‐angle x‐ray diffraction tests and postmortem analysis. It reveals that the weakening of life reinforcement at high temperatures is closely related to the strain induced crystallization behavior of rubber.

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“…The fatigue life value of the packer under complex conditions is also a crucial indicator for analyzing its reliability. As the main sealing component of the packer rubber, the damage and service limit due to stress concentration and creep in the high temperature and pressure process form the basis for analyzing the fatigue life of the packer (Gehrmann and Muhr, 2020;Champy et al, 2021).…”

Section: Damage Reliability Designmentioning

confidence: 99%

Evaluation of bedding effect on the bursting liability of coal and coal-rock combination under different bedding dip angles

Guo

Shui

Liu

et al. 2023

Adv. Geo-Energy Res.

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Heat injection is essential for oil shale in-situ conversion technology. The downhole of the heat injection well reaches temperatures above 400 • C during the process of heat injection, and part of the high-temperature gas dissipates through the wellbore annulus. Consequently, in addition to causing energy loss, the dissipation causes thermal damage to the casing and wellhead. To avoid dissipation, components that are suitable for high-temperature environments should be sealed and used during heat injection while mining. Therefore, this study presents the design of a packer composed of elastic graphite rubber and a high-temperature-resistant material. The influence of numerous factors, such as downhole temperature, working load, and height of rubber, on the reliability of the packer was analyzed. Subsequently, the numerical simulation analysis of the packer reliability in insitu conversion mining under high temperature and pressure environments was performed. The results indicate that when the operating temperature is stable, the operating load has the most obvious influence on the sealing reliability of the packer, whereas the change in the height of the rubber has the least significant effect on the maximum contact stress between the casing and rubber. The change in the operating temperature has the least significant effect on the overall sealing performance of the packer. Moreover, the rise of the temperature will increase the sealing reliability of the packer, and on the contrary, the drop in the temperature will decrease it.

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Fatigue of crystallizable rubber: Generation of a Haigh diagram over a wide range of positive load ratios

Cited by 12 publications

References 26 publications

Research Progress on Fatigue Life of Rubber Materials

Research Progress on Fatigue Life of Rubber Materials

Coupling effect of non‐relaxing and high temperature on fatigue properties of carbon‐black filled isoprene rubber

Evaluation of bedding effect on the bursting liability of coal and coal-rock combination under different bedding dip angles

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