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首页> 外文会议>Transportation research congress >Heterogeneous Fracture Simulation of Asphalt Mixture under Beam Bending Test with Cohesive Zone Modeling
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Heterogeneous Fracture Simulation of Asphalt Mixture under Beam Bending Test with Cohesive Zone Modeling

机译：结合区建模的梁弯曲试验下沥青混合料非均质断裂模拟

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Three points beam bending test has been used widely to investigate the cracking behavior of asphalt mixtures under low temperature, and fracture parameters can be obtained. In this paper, heterogeneous fracture modeling technology is presented to simulate crack evolution in asphalt mixture under beam bending test. Cutting surface images of three types of asphalt mixtures, such as ECA-10, SMA-13, and AC-13 are generated by c2-Dimensional (2D) scanning technology and digital image processing (DIP) method. Finally, 2D heterogeneous numerical models are created for asphalt mixture specimen, and numerical cohesive zone model is utilized to estimate the crack resistance of the interface based on laboratory fracture tests. The inception and propagation of main macro-cracks are carefully studied for three types of asphalt mixtures. Load-displacement curves are plotted, corresponding tensile strength and fracture strain energy density are calculated. The analyzing results of numerical simulation are proved to be quite consistent with actual experimental test, the reliability of numerical model is verified.
机译：三点弯曲试验已被广泛用于研究沥青混合料在低温下的开裂行为，并可获得断裂参数。本文提出了异质断裂建模技术，以模拟梁弯曲试验下沥青混合料的裂缝演化。通过c2维（2D）扫描技术和数字图像处理（DIP）方法生成ECA-10，SMA-13和AC-13等三种类型的沥青混合料的切割表面图像。最后，建立了沥青混合料试样的二维非均质数值模型，并利用数值内聚区模型根据实验室的断裂试验估算了界面的抗裂性。对三种类型的沥青混合料仔细研究了主要宏观裂纹的产生和传播。绘制载荷-位移曲线，计算相应的抗拉强度和断裂应变能密度。数值模拟的分析结果与实际实验结果相吻合，证明了数值模型的可靠性。

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