A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Numerical Modeling of Fatigue Damage in Asphalt Concrete Using Semicircular Bending Testing Configuration
https://orcid.org/https://orcid.org/0000-0001-7805-4218
Fatigue cracking is one of the primary distresses in flexible pavements. To mitigate this damage, it is essential to comprehend the leading mechanisms contributing to cracking growth in asphalt concrete (AC). To evaluate AC cracking resistance for quality contrail/quality assurance (QC/QA), usually, simplified approaches based on static tests are primarily used due to their simplicity. Despite the more complexity involved in cyclic fatigue test procedures, they offer the advantage of inducing a more progressive evolution of cracks under controlled repetitive mechanical loads. Numerical approaches could be used to model cyclic tests in an optimized matter. This study aims to consider the use of finite element method (FEM)-based computational modeling to capture the cracking evolution in AC under repetitive loading but using static semi-circular bending (SCB) tests to obtain damage parameters. SCB static and cyclic tests were performed for model inputs and outputs, respectively. The experimental–numerical calibration approach considering static SCB test results is utilized to calibrate the inputs of the nonlinear viscoelastic cohesive zone (NVCZ) model employed herein. Subsequently, the SCB fatigue (cyclic) test is modeled, and the numerical results are compared to cyclic SCB experimental data to validate the proposed approach. The modeling results agree well with the experimental ones up to a certain number of cycles. However, despite the adaptive insertion of some cohesive zone (CZ) elements as time steps progress, the cracking evolution does not progress as observed during the laboratory experiment. Initial conclusions lead us to infer that differences in stress distribution patterns from static to cyclic SCB tests necessitate the recalibration of CZ fracture parameters.
Numerical Modeling of Fatigue Damage in Asphalt Concrete Using Semicircular Bending Testing Configuration
https://orcid.org/https://orcid.org/0000-0001-7805-4218
Fatigue cracking is one of the primary distresses in flexible pavements. To mitigate this damage, it is essential to comprehend the leading mechanisms contributing to cracking growth in asphalt concrete (AC). To evaluate AC cracking resistance for quality contrail/quality assurance (QC/QA), usually, simplified approaches based on static tests are primarily used due to their simplicity. Despite the more complexity involved in cyclic fatigue test procedures, they offer the advantage of inducing a more progressive evolution of cracks under controlled repetitive mechanical loads. Numerical approaches could be used to model cyclic tests in an optimized matter. This study aims to consider the use of finite element method (FEM)-based computational modeling to capture the cracking evolution in AC under repetitive loading but using static semi-circular bending (SCB) tests to obtain damage parameters. SCB static and cyclic tests were performed for model inputs and outputs, respectively. The experimental–numerical calibration approach considering static SCB test results is utilized to calibrate the inputs of the nonlinear viscoelastic cohesive zone (NVCZ) model employed herein. Subsequently, the SCB fatigue (cyclic) test is modeled, and the numerical results are compared to cyclic SCB experimental data to validate the proposed approach. The modeling results agree well with the experimental ones up to a certain number of cycles. However, despite the adaptive insertion of some cohesive zone (CZ) elements as time steps progress, the cracking evolution does not progress as observed during the laboratory experiment. Initial conclusions lead us to infer that differences in stress distribution patterns from static to cyclic SCB tests necessitate the recalibration of CZ fracture parameters.
Numerical Modeling of Fatigue Damage in Asphalt Concrete Using Semicircular Bending Testing Configuration
https://orcid.org/https://orcid.org/0000-0001-7805-4218
Fatigue cracking is one of the primary distresses in flexible pavements. To mitigate this damage, it is essential to comprehend the leading mechanisms contributing to cracking growth in asphalt concrete (AC). To evaluate AC cracking resistance for quality contrail/quality assurance (QC/QA), usually, simplified approaches based on static tests are primarily used due to their simplicity. Despite the more complexity involved in cyclic fatigue test procedures, they offer the advantage of inducing a more progressive evolution of cracks under controlled repetitive mechanical loads. Numerical approaches could be used to model cyclic tests in an optimized matter. This study aims to consider the use of finite element method (FEM)-based computational modeling to capture the cracking evolution in AC under repetitive loading but using static semi-circular bending (SCB) tests to obtain damage parameters. SCB static and cyclic tests were performed for model inputs and outputs, respectively. The experimental–numerical calibration approach considering static SCB test results is utilized to calibrate the inputs of the nonlinear viscoelastic cohesive zone (NVCZ) model employed herein. Subsequently, the SCB fatigue (cyclic) test is modeled, and the numerical results are compared to cyclic SCB experimental data to validate the proposed approach. The modeling results agree well with the experimental ones up to a certain number of cycles. However, despite the adaptive insertion of some cohesive zone (CZ) elements as time steps progress, the cracking evolution does not progress as observed during the laboratory experiment. Initial conclusions lead us to infer that differences in stress distribution patterns from static to cyclic SCB tests necessitate the recalibration of CZ fracture parameters.
Numerical Modeling of Fatigue Damage in Asphalt Concrete Using Semicircular Bending Testing Configuration
Carter, Alan (editor) / Vasconcelos, Kamilla (editor) / Dave, Eshan (editor) / Veras, Luiz Henrique Almeida (author) / Teixeira, Jamilla Emi Sudo Lutif (author)
International Symposium on Asphalt Pavement & Environment ; 2024 ; Montreal, QC, Canada
14th International Conference on Asphalt Pavements ISAP2024 Montreal ; Chapter: 118 ; 717-722
2024-12-24
6 pages
Article/Chapter (Book)
Electronic Resource
English
| British Library Online Contents | 2013
| British Library Online Contents | 2018
| Taylor & Francis Verlag | 2013