Stochastic fatigue damage in viscoelastic materials using probabilistic pseudo J-integral Paris' law

Li, Hui; Luo, Xue; Zhang, Yuqing; Xu, Rongqiao

doi:10.1016/j.engfracmech.2021.107566

Cited by 15 publications

(5 citation statements)

References 35 publications

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“…In connection with the random nature of the noted factors that form the evolution of the grinding process, it can be stated that the grinding process itself is random, and it is necessary to use probabilistic models to describe it. Such models can be stochastic models of cumulative damage [14][15][16], based on an understanding of the studied process at the macroscopic level and experimental data. The construction of a stochastic model of cumulative damage of the crushed material is based on the use of Markov chains embedded in the studied physical process.…”

Section: Methodsmentioning

confidence: 99%

Modeling the process of grinding feed by the method of damage accumulation

Gavrilov

2021

E3S Web Conf.

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The efficiency of the process of grinding meat and bone feed depends on a number of design and technological parameters of the grinder operation. One of the most significant issues and at the same time the least studied one is the influence of the number of cycles of loading meat and bone feed with the working bodies of grinders on the particle size of the finished meat and bone feed. To study this issue, the authors proposed a method for modeling the process of grinding meat and bone feed using a stochastic B-model of cumulative damage, which is based on an understanding of the process under study at the macroscopic level and experimental data. The constructed B-model made it possible to determine the optimal number of cycles of loading meat and bone feed with the working bodies of the grinders, at which the required particle size of the finished meat and bone feed is 3...5 mm, and there is no unnecessary energy consumption of the grinding process. This number is equal to 12...18 cycles. The results obtained by the B-model are in good agreement with the experimental data. The constructed B-model of the grinding process of meat and bone feed will further help optimizing the operation of the cutting device and reducing energy consumption for the operation of the grinders as a whole.

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Section: Methodsmentioning

confidence: 99%

Modeling the process of grinding feed by the method of damage accumulation

Gavrilov

2021

E3S Web Conf.

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“…Therefore, the appropriate load amplitude should be selected for the time sweep test. Considering the test duration and data stability, and referring to the research results [ 43 ], the stress control mode was selected. The stress amplitude was 0.1 Mpa and 0.2 Mpa, the parallel plate was 8 mm, the plate spacing was 2 mm, the oscillation frequency was 10 Hz, and the test temperature was 30 °C.…”

Section: Materials and Experimentsmentioning

confidence: 99%

Effect of SARA Fractions on Fatigue Properties of Hard Asphalt

Jiang,

Lu,

Guo

et al. 2024

Materials

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The fatigue performance of hard asphalt is an important factor that affects the service life of asphalt pavement. In order to comprehensively explore the influence of chemical components on the fatigue performance of hard asphalt, and to eliminate the chemical instability between the microstructure of asphalt from different oil sources, seven kinds of hard asphalt were designed and prepared with saturates, aromatics, resins, and asphaltenes (SARA) extracted from the same hard asphalt. Rheological, time sweep and linear amplitude sweep (LAS) tests were carried out to evaluate the fatigue properties. The results show that the complex modulus of asphalt binds increased rapidly with an increase of asphaltene and resins and that the colloidal structure was strengthened, which would increase the fatigue factor. In the time sweep test, the strength of the colloidal structure significantly affected the fatigue life, and the fatigue life was different under different test stresses. In the viscoelastic continuum damage (VECD) model, the cumulative damage was related to the modulus, while with the increase of asphaltene and resins, the fatigue life showed a trend of first increasing and then decreasing. The linear regression analysis showed that the fatigue life of hard asphalt had a good correlation with strain sensitivity. This study investigated the applicability of different fatigue evaluation methods and revealed the influence of four components on the fatigue properties of hard asphalt. The results provide significant insights in the improvement of the fatigue performance of both hard asphalt and corresponding mixtures.

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“…Mineral filler, fine aggregates (< 2.36 mm), and asphalt binder were preheated in an oven at the mixing temperature for one hour. Then, the fine aggregates were mixed with asphalt binder in a mixer for 5 min, after which the (29) V mastic,JMF = V be + V 0.75 (30) V mastic,i = 6 mineral filler was added and mixed for an additional 5 min. Finally, the loosened FAM material was put back into the oven for half an hour to simulate shortterm aging.…”

Section: Fam Materials Preparationmentioning

confidence: 99%

“…From a mesoscopic perspective, fatigue cracking is mainly caused by adhesive failure and cohesive failure in AC. Adhesive failure refers to the separation between the coarse aggregate and the FAM, while cohesive failure occurs within the FAM [30][31][32]. Therefore, investigating the fatigue performance of FAM is crucial to understanding the failure of AC [18,33].…”

Section: Introductionmentioning

confidence: 99%

Fatigue performance analysis of fine aggregate matrix using a newly designed experimental strategy and viscoelastic continuum damage theory

Tan,

Li,

Leng

et al. 2024

Mater Struct

Self Cite

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Fine aggregate matrix (FAM), as the matrix phase in asphalt concrete (AC), significantly affects the fatigue behavior of AC. To accurately assess the mechanical properties of FAM, a newly designed experimental strategy for FAM testing was developed, and the viscoelastic continuum damage theory (VECD) theory was applied to analyze FAM’s fatigue cracking characteristics. In this study, a dumbbell-shaped geometry for dynamic shear rheometer testing was designed and verified through the FE-aided method. Subsequently, three AC mixtures’ FAM specimens with this special geometry were fabricated for the frequency sweep and linear amplitude sweep tests. Results showed that the specially designed specimens effectively capture the viscoelastic and fatigue properties of FAM with high replicability. Analyses based on the VECD theory indicated that FAM of porous asphalt (FAM(PA13)), featuring a higher asphalt content, exhibits a significant reduction in pseudo stiffness with increasing damage at the initial stage, but the reduction rate diminishes as damage progresses when compared to the other two FAMs. It was speculated that the higher aggregate content in FAM of dense-graded AC mixture (FAM(AC20) induces stress concentrations in the asphalt mastic near the protrusion areas of aggregates, thereby rendering the sample more susceptible to damage. The proposed methods will be readily extended to characterize other mechanical properties of FAM.

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Stochastic fatigue damage in viscoelastic materials using probabilistic pseudo J-integral Paris' law

Cited by 15 publications

References 35 publications

Modeling the process of grinding feed by the method of damage accumulation

Modeling the process of grinding feed by the method of damage accumulation

Effect of SARA Fractions on Fatigue Properties of Hard Asphalt

Fatigue performance analysis of fine aggregate matrix using a newly designed experimental strategy and viscoelastic continuum damage theory

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