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Meng Ling
Texas A&M Transportation Institute, Texas A&M University System, College Station, TX 77843, United States

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Journal article
Published: 24 May 2021 in International Journal of Fatigue
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Fatigue life is one of the most critical factors for asphalt pavement design, which is directly affected by the fracture properties of asphalt mixtures. This study aimed to present a mechanistic framework to determine the Paris’ law parameters A′ and n′ of asphalt mixtures and fatigue life of asphalt pavements. The dynamic modulus test and indirect tensile (IDT) test results were obtained from Texas Data Storage System (DSS) to evaluate the linear viscoelastic properties and fracture properties. Modified Griffith crack criterion in tension was used to determine the damage density rate and pseudo J-integral of macrocracks appeared in the post-peak phase of the IDT test, and the damage density with time was shown as a sigmoidal shape from microcracking initiation. The Paris’ law parameters were then computed using the regression analysis in the macrocracking stage. It was shown that the fracture resistance of asphalt mixtures could be characterized using n′, and a smaller value of n′ indicates a better fracture resistance. The mode-I fatigue life equation for reflection cracking in asphalt pavements was also proposed based on the J-integral from the finite element model and Paris’ law parameters, which shows that the empirical fatigue life transfer function could also be determined from actual material properties and pavement structural boundary conditions.

ACS Style

Meng Ling; Jun Zhang; Luis Fuentes; Lubinda F. Walubita; Robert L. Lytton. A mechanistic framework for tensile fatigue resistance of asphalt mixtures. International Journal of Fatigue 2021, 151, 106345 .

AMA Style

Meng Ling, Jun Zhang, Luis Fuentes, Lubinda F. Walubita, Robert L. Lytton. A mechanistic framework for tensile fatigue resistance of asphalt mixtures. International Journal of Fatigue. 2021; 151 ():106345.

Chicago/Turabian Style

Meng Ling; Jun Zhang; Luis Fuentes; Lubinda F. Walubita; Robert L. Lytton. 2021. "A mechanistic framework for tensile fatigue resistance of asphalt mixtures." International Journal of Fatigue 151, no. : 106345.

Journal article
Published: 14 April 2021 in Engineering Fracture Mechanics
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In this study, the mechanisms of top-down crack (TDC) propagation were investigated based on viscoelastic finite element (FE) analyses. By computing J-integral through 3D FE viscoelastic analyses, TDC propagation mechanisms were examined in pavement structures with cement-treated base (CTB) and granular base (GB) and different asphalt concrete (AC) layer thicknesses. The results showed that applying realistic tire-pavement contact stresses caused TDCs propagation rate to increase 1.15 to 5.45 times due to mixed-mode I + II fracture. However, the proportion of tensile and shear modes was significantly affected by the TDC depths. In addition, by increasing temperature from 25 to 50 °C, J-integral increased 3.5 to 4.4 times at different depths. Due to vehicle speeds reduction from 96 to 8 km/h and viscoelastic impact at lower speeds, TDCs propagation rate increased up to 1.9 times in different depths analyzed.

ACS Style

Mohsen Alae; Meng Ling; Hamzeh F. Haghshenas; Yanqing Zhao. Three-dimensional finite element analysis of top-down crack propagation in asphalt pavements. Engineering Fracture Mechanics 2021, 248, 107736 .

AMA Style

Mohsen Alae, Meng Ling, Hamzeh F. Haghshenas, Yanqing Zhao. Three-dimensional finite element analysis of top-down crack propagation in asphalt pavements. Engineering Fracture Mechanics. 2021; 248 ():107736.

Chicago/Turabian Style

Mohsen Alae; Meng Ling; Hamzeh F. Haghshenas; Yanqing Zhao. 2021. "Three-dimensional finite element analysis of top-down crack propagation in asphalt pavements." Engineering Fracture Mechanics 248, no. : 107736.

Journal article
Published: 17 September 2020 in Construction and Building Materials
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The aims of this study are to determine the complex Poisson’s ratio of asphalt mixtures based on linear viscoelastic theory and to evaluate the effect of the complex Poisson’s ratio on critical responses of asphalt pavements using finite element (FE) models. Direct tension tests were conducted on field core specimens, and horizontal and axial strains at the top and bottom of the field cores were recorded with loading time. The elastic–viscoelastic correspondence principle was utilized to compute the complex Poisson’s ratio including the magnitude and phase angle with loading frequency. It is shown that the magnitude and phase angle were time, temperature and aging dependent. To better illustrate the effect of the complex Poisson’s ratio on asphalt pavement responses, FE models with user-defined materials were developed to compute and compare pavement responses at critical locations with a constant Poisson’s ratio and a complex Poisson’s ratio. Besides, the effect of the aging time on the complex Poisson’s ratio was evaluated from pavement responses. The differences between these cases were highlighted, which indicated the importance of using the complex Poisson’s ratio in pavement design and performance evaluation.

ACS Style

Meng Ling; Yong Deng; Yao Zhang; Xue Luo; Robert L. Lytton. Evaluation of complex Poisson’s ratio of aged asphalt field cores using direct tension test and finite element simulation. Construction and Building Materials 2020, 261, 120329 .

AMA Style

Meng Ling, Yong Deng, Yao Zhang, Xue Luo, Robert L. Lytton. Evaluation of complex Poisson’s ratio of aged asphalt field cores using direct tension test and finite element simulation. Construction and Building Materials. 2020; 261 ():120329.

Chicago/Turabian Style

Meng Ling; Yong Deng; Yao Zhang; Xue Luo; Robert L. Lytton. 2020. "Evaluation of complex Poisson’s ratio of aged asphalt field cores using direct tension test and finite element simulation." Construction and Building Materials 261, no. : 120329.

Journal article
Published: 16 August 2019 in Composites Part B: Engineering
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This study aims to determine the endurance limit and macro-cracking threshold of a viscoelastic composite material using a fracture mechanics approach. Asphalt mixtures containing different recycled material contents and recycling agent doses were fabricated and long-term oven aged. Dynamic modulus tests were first conducted to obtain linear viscoelastic properties including complex modulus and phase angle, and then damage properties were determined from monotonic semi-circular bending tests. Pseudo displacement was calculated to remove the viscous effect from the total dissipated energy, and the energy balance approach and Griffith crack growth criterion were modified and used to predict the bond energy with the aid of discrete element modeling. With the bond energy computed, the endurance limit was determined to be frequency and mixture composition dependent. The macro-cracking threshold defined as the boundary between healable micro-cracks and non-healable macro-cracks was also identified to be frequency and composition dependent using a damage density concept. Both the endurance limit and the macro-cracking threshold were utilized in the asphalt mixture Black Space diagram, which is capable of illustrating the effects of aging, recycled materials content and recycling agent dose in asphalt mixtures for the prediction of fracture performance.

ACS Style

Meng Ling; Yao Zhang; Fawaz Kaseer; Amy Epps Martin; Robert L. Lytton. Investigation of fracture behavior of asphalt mixture composite using energy-based approach. Composites Part B: Engineering 2019, 181, 107324 .

AMA Style

Meng Ling, Yao Zhang, Fawaz Kaseer, Amy Epps Martin, Robert L. Lytton. Investigation of fracture behavior of asphalt mixture composite using energy-based approach. Composites Part B: Engineering. 2019; 181 ():107324.

Chicago/Turabian Style

Meng Ling; Yao Zhang; Fawaz Kaseer; Amy Epps Martin; Robert L. Lytton. 2019. "Investigation of fracture behavior of asphalt mixture composite using energy-based approach." Composites Part B: Engineering 181, no. : 107324.

Journal article
Published: 05 March 2019 in Construction and Building Materials
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A calibrated mechanistic-empirical model was developed to analyze top-down cracking (TDC) performance with actual traffic load and thermal stress. The traffic-induced and thermal-induced J-integral were employed in the Paris’ law with fracture parameters A′ and n′ estimated using asphalt mixture properties. Number of days for initiated TDC to reach the medium severity level was then calculated mechanistically, which was related to field performance for calibration purposes. It was observed that when TDC reached a critical length, the TDC length diminished and area of fatigue cracking increased. An associated computer program was also developed, which normally completed a 30-year performance analysis within 1 min.

ACS Style

Meng Ling; Xue Luo; Yu Chen; Sheng Hu; Robert L. Lytton. A calibrated mechanics-based model for top-down cracking of asphalt pavements. Construction and Building Materials 2019, 208, 102 -112.

AMA Style

Meng Ling, Xue Luo, Yu Chen, Sheng Hu, Robert L. Lytton. A calibrated mechanics-based model for top-down cracking of asphalt pavements. Construction and Building Materials. 2019; 208 ():102-112.

Chicago/Turabian Style

Meng Ling; Xue Luo; Yu Chen; Sheng Hu; Robert L. Lytton. 2019. "A calibrated mechanics-based model for top-down cracking of asphalt pavements." Construction and Building Materials 208, no. : 102-112.

Journal article
Published: 15 February 2019 in Construction and Building Materials
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Thermal cracking is a non-load associated distress mode of asphalt pavements. Finite element models (FEM) were first introduced in this study to determine the thermally induced J-integral at the tip of thermal crack. After extensive runs of the FEM, artificial neural network models were constructed to predict the J-integral, which was used in the Paris’ law to calculate the cumulative thermal crack growth over time and thermal cracking fatigue life. Additionally, Long-term pavement performance data was collected to characterize the thermal cracking in different climatic zones. The calculated fatigue life was well correlated with the observed transverse cracking field performance.

ACS Style

Meng Ling; Yu Chen; Sheng Hu; Xue Luo; Robert L. Lytton. Enhanced model for thermally induced transverse cracking of asphalt pavements. Construction and Building Materials 2019, 206, 130 -139.

AMA Style

Meng Ling, Yu Chen, Sheng Hu, Xue Luo, Robert L. Lytton. Enhanced model for thermally induced transverse cracking of asphalt pavements. Construction and Building Materials. 2019; 206 ():130-139.

Chicago/Turabian Style

Meng Ling; Yu Chen; Sheng Hu; Xue Luo; Robert L. Lytton. 2019. "Enhanced model for thermally induced transverse cracking of asphalt pavements." Construction and Building Materials 206, no. : 130-139.

Book
Published: 31 October 2018 in A Mechanisticâ€"Empirical Model for Topâ€"Down Cracking of Asphalt Pavements Layers
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ACS Style

Robert L. Lytton; Xue Luo; Meng Ling; Yu Chen; Sheng Hu; Fan Gu; National Cooperative Highway Research Program; Transportation Research Board. A Mechanisticâ€"Empirical Model for Topâ€"Down Cracking of Asphalt Pavements Layers. A Mechanisticâ€"Empirical Model for Topâ€"Down Cracking of Asphalt Pavements Layers 2018, 1 .

AMA Style

Robert L. Lytton, Xue Luo, Meng Ling, Yu Chen, Sheng Hu, Fan Gu, National Cooperative Highway Research Program, Transportation Research Board. A Mechanisticâ€"Empirical Model for Topâ€"Down Cracking of Asphalt Pavements Layers. A Mechanisticâ€"Empirical Model for Topâ€"Down Cracking of Asphalt Pavements Layers. 2018; ():1.

Chicago/Turabian Style

Robert L. Lytton; Xue Luo; Meng Ling; Yu Chen; Sheng Hu; Fan Gu; National Cooperative Highway Research Program; Transportation Research Board. 2018. "A Mechanisticâ€"Empirical Model for Topâ€"Down Cracking of Asphalt Pavements Layers." A Mechanisticâ€"Empirical Model for Topâ€"Down Cracking of Asphalt Pavements Layers , no. : 1.

Review
Published: 20 October 2018 in Construction and Building Materials
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Top-down cracking has been identified worldwide and is regarded as a major type of asphalt pavement distress. Along with a comprehensive review of the existing work, this study is intended to propose a roadmap for developing a mechanistic-empirical model and associated design software for top-down cracking in asphalt pavements. This paper reviews eleven sub-models relevant to material, structure, traffic, and climate to account for the key factors that affect top-down cracking. Over 120 published studies are located and reviewed in terms of modeling techniques, model types, and model components. In addition, the methods and sources to identify and collect the data required to develop these sub-models are presented. Within the scope of this work, this study discusses several sub-models as examples and provides a roadmap for future development. The introduced sub-models emphasize some critical issues, such as the modulus gradient due to non-uniform aging, different cracking mechanisms, and computation of the J-integral (energy release rate) that drives the crack downward from the pavement surface. Finally, this study provides an assembling plan to put all of the sub-models together into a Top-Down Cracking Program, which could predict and calibrate the growth of top-down cracking in asphalt pavements.

ACS Style

Xue Luo; Fan Gu; Meng Ling; Robert L. Lytton. Review of mechanistic-empirical modeling of top-down cracking in asphalt pavements. Construction and Building Materials 2018, 191, 1053 -1070.

AMA Style

Xue Luo, Fan Gu, Meng Ling, Robert L. Lytton. Review of mechanistic-empirical modeling of top-down cracking in asphalt pavements. Construction and Building Materials. 2018; 191 ():1053-1070.

Chicago/Turabian Style

Xue Luo; Fan Gu; Meng Ling; Robert L. Lytton. 2018. "Review of mechanistic-empirical modeling of top-down cracking in asphalt pavements." Construction and Building Materials 191, no. : 1053-1070.

Original articles
Published: 05 July 2018 in International Journal of Pavement Engineering
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Mechanistic-empirical models are developed in this study to characterise top-down cracking (TDC) initiation of asphalt pavements. TDC initiation phase is defined as a stage for micro-cracks to initiate and coalesce into a macro-crack which appears at pavement surface. Micro-fracture mechanics and Miner’s hypothesis are applied as the mechanistic approach to calculate numbers of axle load cycles at different load spectrum levels and corresponding cumulative micro-crack damage in the TDC initiation phase. Long-term pavement performance (LTPP) data including traffic load, pavement distress, material properties, pavement structure and temperature are collected and analysed. Traffic load is characterised using a load spectrum model and TDC initiation time is predicted from historical distress observations. A mathematical model is proposed to characterise the initial air void distribution within surface layer. The LTPP data are utilised to develop mechanics-based prediction models to compute a TDC initiation energy parameter and initiation time. Unaged surface layer modulus, m-value of relaxation modulus of surface layer and pavement structure are identified as key factors for the initiation energy parameter. Traffic load, initiation energy parameter and temperature are critical to the initiation time. As illustrated in the development and validation process, the prediction models show reasonable agreement with TDC field performance.

ACS Style

Meng Ling; Xue Luo; Yu Chen; Fan Gu; Robert L. Lytton. Mechanistic-empirical models for top-down cracking initiation of asphalt pavements. International Journal of Pavement Engineering 2018, 21, 464 -473.

AMA Style

Meng Ling, Xue Luo, Yu Chen, Fan Gu, Robert L. Lytton. Mechanistic-empirical models for top-down cracking initiation of asphalt pavements. International Journal of Pavement Engineering. 2018; 21 (4):464-473.

Chicago/Turabian Style

Meng Ling; Xue Luo; Yu Chen; Fan Gu; Robert L. Lytton. 2018. "Mechanistic-empirical models for top-down cracking initiation of asphalt pavements." International Journal of Pavement Engineering 21, no. 4: 464-473.

Journal article
Published: 12 March 2018 in Applied Sciences
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Fatigue resistance quantification of modified asphalt is typically time consuming and may not correlate well with mixture fatigue test results. In this paper, the applicability of a multiple stress creep and recovery (MSCR) test on asphalt binder’s fatigue resistance was evaluated. Six binder types with a variety of modifiers and different modifier contents were characterized. The MSCR test was conducted and its sensitivity to binder type and additive content under different aging durations was evaluated. Mixture fatigue tests including a semi-circular bending- Illinois flexibility index test and indirect tensile strength were conducted using control base asphalt and SBS modified asphalt. A ranking between the binder MSCR and mixture fracture test results was conducted to check if the MSCR result was representative of the mixture’s fatigue resistance. Results indicate that the MSCR test at intermediate temperatures (20 °C, 25 °C, and 30 °C) can be performed with good repetitions. It was also found that the MSCR test was sensitive enough to differentiate the fatigue resistance among different binder types and additive contents. The ranking analysis shows that the binder MSCR test at intermediate temperatures showed a similar ranking to the mixture’s fatigue tests, indicating that the binder MSCR test could be potentially utilized to represent a mixture’s fatigue resistance where binder selection is a major concern. It was also found that the SBS modified binder showed the best crack resistance and was less affected by aging.

ACS Style

Weiguang Zhang; Tao Ma; Gang Xu; XiaoMing Huang; Meng Ling; Xiao Chen; Jiayue Xue. Fatigue Resistance Evaluation of Modified Asphalt Using a Multiple Stress Creep and Recovery (MSCR) Test. Applied Sciences 2018, 8, 417 .

AMA Style

Weiguang Zhang, Tao Ma, Gang Xu, XiaoMing Huang, Meng Ling, Xiao Chen, Jiayue Xue. Fatigue Resistance Evaluation of Modified Asphalt Using a Multiple Stress Creep and Recovery (MSCR) Test. Applied Sciences. 2018; 8 (3):417.

Chicago/Turabian Style

Weiguang Zhang; Tao Ma; Gang Xu; XiaoMing Huang; Meng Ling; Xiao Chen; Jiayue Xue. 2018. "Fatigue Resistance Evaluation of Modified Asphalt Using a Multiple Stress Creep and Recovery (MSCR) Test." Applied Sciences 8, no. 3: 417.

Journal article
Published: 20 February 2017 in Materials and Structures
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ACS Style

Meng Ling; Xue Luo; Fan Gu; Robert L. Lytton. An inverse approach to determine complex modulus gradient of field-aged asphalt mixtures. Materials and Structures 2017, 50, 1 .

AMA Style

Meng Ling, Xue Luo, Fan Gu, Robert L. Lytton. An inverse approach to determine complex modulus gradient of field-aged asphalt mixtures. Materials and Structures. 2017; 50 (2):1.

Chicago/Turabian Style

Meng Ling; Xue Luo; Fan Gu; Robert L. Lytton. 2017. "An inverse approach to determine complex modulus gradient of field-aged asphalt mixtures." Materials and Structures 50, no. 2: 1.