摘要
应用有限元软件RFPA,建立不同级配的混合料模型,模拟沥青混凝土小梁的抗弯拉性能,并实现了对材料变形、微破裂到宏观破坏全过程模拟。通过研究不同级配混合料的弯曲断裂,对沥青混凝土小梁裂缝的形成过程及其走向有了更深入的认识。结果表明,数值模拟是研究沥青混合料性能试验的有效手段,通过模拟得知,骨架密实型的沥青混凝土抵抗变形能力最好;产生的裂缝全为绕集料扩展。
RFPA, a finite element program, is selected to carry on the numerical simulation of as phalt concrete trabecula＇ s bending fracture of different gradation. It presents us the whole process of deformation, micro rupture and macro failure of the materials. This made us comprehend well the formarion and trend of crack of asphalt concrete trabecula. It is indicated that, numerical simulation is an effective method to improve the research level of the asphalt mixtures, asphalt concrete of dense framework type possesses better deformation resistance, and cracks are all extending bypass aggre gates.
出处
《石油沥青》
2009年第1期51-54,共4页
Petroleum Asphalt
关键词
沥青混凝土
弯曲断裂
数值模拟
Asphalt concrete
Bending fracture
Numerical simulation
