Recursive pseudo fatigue cracking damage model for asphalt pavements

Tutu, Kenneth A.; Timm, David H

doi:10.1080/10298436.2020.1867856

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…The beginning depth of the crack is fixed at 0.007 m since initial cracks are frequently present before operation [34]. The model width is taken as 10 m, and the thickness of the roadbed is taken as 7 m. The direct modeling method is employed in this bottomup modeling starting from the crack front to provide better control of the cell accuracy especially in the area close to the crack.…”

Section: Finite Element Modelingmentioning

confidence: 99%

Study on anti-crack effect of semi-rigid base pavement with stress absorbing layer

Nie¹,

Wang

Sun

et al. 2023

J. Eng. Appl. Sci.

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For the characteristics of semi-rigid base asphalt pavement prone to cracking, various stress-absorption layers are applied widely by decreasing stress concentration, improving interlayer bonding and waterproofing. Existing studies on the anti-cracking effect of stress absorbing layers rarely consider top-down fatigue cracking on the outside of the boundary of the vehicle loading zone. Firstly, this paper proposes a finite element model setting a downward expansion of fatigue crack in pavement based on fracture mechanics. The influence law of modulus and thickness of stress absorbing layer on stress intensity factor of crack tip and the fatigue life of the pavement is analyzed furthermore. Numerical calculation results demonstrate that shearing stress intensity factor increases with stress absorbing layer thickness and decreases with stress absorbing layer modulus, while fatigue life of pavement grows with the modulus of the stress absorbing layer and decreases with its thickness. Sensitivity analysis indicates that the modulus of the stress absorbing layer has a greater effect on the fatigue life of the pavement relative to thickness, which offers reference for further promotion and application of stress absorbing layer.

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Section: Finite Element Modelingmentioning

confidence: 99%

Study on anti-crack effect of semi-rigid base pavement with stress absorbing layer

Nie¹,

Wang

Sun

et al. 2023

J. Eng. Appl. Sci.

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“…The optimum amount of bitumen for the intermediate layer in the asphalt mixture for this section was determined by Marshall testing to be 4.3%. The maximum theoretical relative density was 2.539 g/cm 3 , and the gradation composition is shown in Table 5.…”

Section: Items Test Values Specification [28]mentioning

confidence: 99%

“…For highways with design lives of 20 years, asphalt mixture pavements are used, but they are susceptible to heavy loads, high temperatures, rain, and other adverse coupled factors [2]. Furthermore, they are prone to early severe damage, such as wheel ruts, potholes, looseness, flooding oil, and swelling within the first 1-2 years of use [3]. As these phenomena are not evident early on in use, the development of early failure is difficult to control, increasing the maintenance and repair costs of the road at later stages, affecting the comfort and safety of vehicle travel, and reducing the normal service life of the road.…”

Section: Introductionmentioning

confidence: 99%

Research on the Quality of Asphalt Pavement Construction Based on Nondestructive Testing Technology

Chen

Han

et al. 2022

Coatings

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In order to better evaluate the construction quality of asphalt pavement, nondestructive testing techniques are used to inspect newly paved asphalt mixture pavement. The proposed system for the evaluation of asphalt pavement construction quality uses three-dimensional ground-penetrating radar (GPR) and a non-nuclear density gauge. The GPR and the non-nuclear density gauge test results were used to establish a dielectric constant–porosity model by fitting. This approach can more accurately determine the dielectric constant selection scheme of the GPR based on the average value of every 10 dielectric constant data points in the length direction of the radar antenna and every three data channels in the width direction. The GPR collected the dielectric constants of the road surface based on the total reflection method and used the average value of the local dielectric constant to evaluate the construction quality of the road. The non-nuclear density gauge used the local porosity to assess the construction quality of the road. It is recommended that the two testing schemes described above be used to evaluate the quality of asphalt pavement construction. They can provide theoretical guidance for future applications in practical processes.

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“…Although an instantaneous damage model may initially come to mind due to the immediacy of material failure, it tends to lack convergence. Therefore, this study employs a recursive model [45] to progressively diminish the material properties over multiple solution steps. This approach involves applying damage variables, ranging from 0 to 1, to the current constitutive matrix during each step following the initiation of damage, until the stiffness is signi cantly reduced (i.e., to 5% of the initial value).…”

mentioning

confidence: 99%

Experimental and Mesoscale Numerical Investigation of the Mechanical Behavior and Failure Modes of Mottled Bamboo

Liu

2023

Preprint

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Mottled bamboo and its related products have received significant attention due to their low carbon content, high specific strength, and stiffness. This paper presents geometric and constitutive models on mesoscale to establish the material response of bamboo under various loading conditions. By conducting mesoscale numerical simulations and experimental investigations, the mechanical behavior and failure modes of bamboo subjected to longitudinal tension and compression, transverse tension and compression, and shear loads are systematically analyzed. This study plays a crucial role in understanding the mechanical behavior and failure modes of bamboo materials. Furthermore, the mesoscale exploration of the mechanical strength of different laminated designs for structural bamboo glulam can offer valuable support for the future design and production of such glulam structures.

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Recursive pseudo fatigue cracking damage model for asphalt pavements

Cited by 6 publications

References 17 publications

Study on anti-crack effect of semi-rigid base pavement with stress absorbing layer

Study on anti-crack effect of semi-rigid base pavement with stress absorbing layer

Research on the Quality of Asphalt Pavement Construction Based on Nondestructive Testing Technology

Experimental and Mesoscale Numerical Investigation of the Mechanical Behavior and Failure Modes of Mottled Bamboo

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