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首页> 外文会议>International Airfield and Highway Pavements Conference >Fracture Analysis of Semi-Circular Bending Test of Asphalt Mixtures Based on Extended Finite Element Method
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Fracture Analysis of Semi-Circular Bending Test of Asphalt Mixtures Based on Extended Finite Element Method

机译：基于延长有限元法的沥青混合物半圆形弯曲试验的断裂分析

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A two-dimensional (2D) semi-circular bending (SCB) model was constructed with the extended finite element method (XFEM) to investigate the fracture performance of asphalt mixtures. The influence of material properties, which include the tensile strength, fracture energy, and elastic modulus, on the crack development in the I-FIT SCB configuration has been examined through the load-displacement curves. A full factorial of 64 simulation cases varying in material properties was carried out for sensitivity analysis. The simulation results showed that the crack development could be divided into four stages according to the damage evolvement. In addition, it was found that stiffer modulus results in higher peak load and steeper slope of curve. Tensile strength showed a noticeable effect on the peak load, while the fracture energy was highly related with the area under curve after peak load. Linear regression equations have been established between material properties and load-displacement curve parameters.
机译：用延长的有限元法（XFEM）构建了二维（2D）半圆形弯曲（SCB）模型，以研究沥青混合物的断裂性能。通过负载 - 位移曲线研究了包括拉伸强度，断裂能和弹性模量的材料性能对I-FIT SCB构造中的裂纹开发的影响。进行了64种模拟案例的完整因子，以进行敏感性分析。仿真结果表明，根据损伤的演变，裂纹开发可分为四个阶段。另外，发现曲线的峰值负荷和陡峭斜率更强的模量。拉伸强度显示出对峰值负荷的显着效果，而裂缝能量与峰值负荷后的曲线下的面积高度相关。在材料特性和负载 - 位移曲线参数之间建立了线性回归方程。

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