DIC-Enhanced Identification of Bodner-Partom Model Parameters for Bitumen Binder.

Area of Science:

• Materials Science
• Civil Engineering
• Rheology

Background:

• Bitumen binder is essential for asphalt mixtures in pavement construction.
• Its long-term performance significantly impacts pavement layer behavior.
• Understanding bitumen binder's mechanical response is critical for durable infrastructure.

Purpose of the Study:

• To identify parameters for the Bodner-Partom material model for bitumen binder.
• To numerically simulate bitumen binder behavior under tensile stress.
• To validate the model's accuracy against experimental data.

Main Methods:

• Performing uniaxial tensile tests on bitumen binder at various strain rates.
• Utilizing digital image correlation (DIC) for precise material response capture.
• Implementing the Bodner-Partom model for numerical computation.

Main Results:

• Successfully identified Bodner-Partom model parameters for bitumen binder.
• Achieved good agreement between experimental and numerical results.
• Observed a maximum error of approximately 10% at tested elongation rates.

Conclusions:

• The Bodner-Partom model is applicable and effective for analyzing bitumen binder.
• DIC-enhanced experiments provide reliable data for material modeling.
• This approach enhances the prediction of asphalt mixture performance in pavements.