Definition and experimental validation of a new model for the fatigue of elastomers incorporating deviations from Miners linear law of cumulative damage

Jardin, Audrey; Leblond, Jean-Baptiste; Berghezan, Daniel; Portigliatti, Maude

doi:10.1016/j.proeng.2010.03.177

Cited by 15 publications

(7 citation statements)

References 1 publication

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“…In recent decades, much attention has been attached to the development of constitutive models which can describe the effects of temperature and strain rate on the properties of the highly particle‐filled elastomers . However, at present, there is a lack of suitable constitutive model that can effectively describe the mechanical properties of these materials at various temperatures and high strain rates.…”

Section: Introductionmentioning

confidence: 99%

Tensile mechanical properties and constitutive model for HTPB propellant at low temperature and high strain rate

Wang¹,

Hu²,

Wang³

et al. 2015

J of Applied Polymer Sci

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To investigate the mechanical properties and fracture mechanisms of hydroxyl-terminated polybutadiene (HTPB) propellant at low temperature and high strain rate, uniaxial tensile tests were conducted over the range of temperatures 233 to 298 K and strain rates 0.4 to 14.14 s 21 using an INSTRON testing machine, and scanning electron microscope (SEM) was employed to observe the tensile fracture surfaces. The experimental results indicate that the deformation properties of HTPB propellant are remarkably influenced by temperature and strain rate. The characteristics of stress-strain curves at low temperatures are different from that at room temperature, and the effects of temperature and strain rate on the mechanical properties are closely related to the changes of properties and the fracture mechanisms of HTPB propellant. The dominating fracture mechanism depends much on the temperature and changes from the dewetting and matrix tearing at room temperature to the particle brittle fracture at low temperature, and the effect of strain rate only alters the mechanism in a quantitative manner. Finally, a nonlinear viscoelastic constitutive model incorporating the damage evolution and the effects of temperature and strain rate was developed to describe the stress responses of this propellant under the test conditions. During this process, the Schapery-type constitutive theories were applied and one damage variable was considered to establish the damage evolution function. The overlap between experimental results and predicted results are generally good, which confirms that the developed constitutive model is valid, however, further researches should be done due to some drawbacks in describing the deformation behaviors at very large strain.

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Section: Introductionmentioning

confidence: 99%

Tensile mechanical properties and constitutive model for HTPB propellant at low temperature and high strain rate

Wang¹,

Hu²,

Wang³

et al. 2015

J of Applied Polymer Sci

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show abstract

“…30 The most commonly used is the linear cumulative damage criterion (Palmgren-Miner Rule, PMR) to calculate the degradation fatigue life of components. 31,32 Palmegren-Miner linear damage accumulation law is presented as an ideal model, where the influence of factors such as interaction between loads and load sequence are not considered. 33 There is a big deviation between the calculated results of Miner law and the actual test results.…”

Section: Statement Of Problemsmentioning

confidence: 99%

Fatigue life prediction of train wheel shaft based on load spectrum characteristics

Luo

Wang

Liu

et al. 2021

Advances in Mechanical Engineering

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Based on the analysis of load spectrum data, the loading sequence and the interaction between loads are considered, a fatigue life prediction model based on load spectrum is proposed. The load spectrum is preprocessed and the probability density function of mean and amplitude are fitted. The running condition of the train is analyzed, the one-dimensional program load spectrum of wheel and axle load is constructed by extrapolating the load spectrum. According to the modified fatigue cumulative damage method, the fatigue life of the axle is predicted with the one-dimensional program load spectrum. The relevant factors that affect the strength of the part are fully considers in the model. It more accurately reflects the objective facts of the component fatigue process. The result has more engineering reference significance and it provides a theoretical basis for the design and manufacture of train axles and ensuring safe operation.

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“…27 It is not only the simplest form and the most conducive to engineering applications but the life expectancy is also very consistent with the experimental results in most cases. 28 Its expression is 29 According to the relationship between cumulative damage and fatigue life of materials, the fatigue life expression is T = 1 D . Thus, the degradation fatigue life of metal components can be obtained.…”

Section: Statement Of Problemsmentioning

confidence: 99%

“…Currently, the most commonly used is the linear cumulative damage criterion [Palmgren–Miner rule (PMR)] to calculate the degradation fatigue life of components 27 . It is not only the simplest form and the most conducive to engineering applications but the life expectancy is also very consistent with the experimental results in most cases 28 . Its expression is

\sum_{i = 1}^{k} \frac{n_{i}}{N_{i}} = 1

29 .…”

Section: Statement Of Problemsmentioning

confidence: 99%

Prediction and evaluation of fatigue life for mechanical components considering anelasticity‐based load spectrum

Wang

Liu

Jiang

et al. 2020

Fatigue Fract Eng Mat Struct

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To accurately predict the degraded fatigue life of components under random loads, anelasticity effect of metal on life estimation needs to be explored. Weighting coefficient and dynamic elastic modulus are introduced to modify the calculation process of the model. By establishing an equal-amplitude fatigue median surface and applying Miner linear fatigue cumulative damage theory, a fatigue life prediction model of the component under random loads is proposed. The model can be used to calculate the degraded fatigue life of components, which provides a theoretical basis for life estimation under random load spectrum. The two-dimensional load spectrum is compared with the unprocessed two-dimensional load spectrum and the one-dimensional program spectrum in life prediction results. With the comparison of the target life and simulation life and the data calculated by the model of the automobile front stabilizer bar, it is concluded that the data obtained by the modified model are more reasonable and accurate.

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Definition and experimental validation of a new model for the fatigue of elastomers incorporating deviations from Miners linear law of cumulative damage

Cited by 15 publications

References 1 publication

Tensile mechanical properties and constitutive model for HTPB propellant at low temperature and high strain rate

Tensile mechanical properties and constitutive model for HTPB propellant at low temperature and high strain rate

Fatigue life prediction of train wheel shaft based on load spectrum characteristics

Prediction and evaluation of fatigue life for mechanical components considering anelasticity‐based load spectrum

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