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首页> 外文期刊>International journal of structural integrity >Finite element method for solving asphalt mixture problem
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Finite element method for solving asphalt mixture problem

机译：有限元方法求解沥青混合料的问题

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Purpose - Asphalt mixture is widely used in road engineering, and its performance research is particularly important. But the study of asphalt mixture performance needs a lot of tests, such as bending test, splitting test and so on. It also needs a lot of time and material resources. The purpose of this paper is to obtain test results through finite element numerical simulation, and show that this saves a lot of manpower and material resources. Design/methodology/approach - The mechanical parameters of the material are obtained through uniaxial compression tests. The true stress and plastic strain are calculated according to nominal stress and nominal strain. A constitutive model is established. Then a finite element model of asphalt mixture is established. The numerical simulation and performance study of asphalt mixture bending test is carried out. At the same time, according to the above method, the asphalt mixture is subjected to freeze-thaw cycles and ultraviolet aging, and the mechanical parameters are obtained by a uniaxial compression test. A numerical model is established to simulate the bending characteristics of asphalt mixture after freeze-thaw cycles and ultraviolet aging. Findings - A uniaxial compression test of the asphalt mixture is conducted to obtain nominal stress and nominal strain. The true stress and plastic strain are calculated and the elastic modulus is established with Poisson's ratio as the elastic part, and the true stress and plastic strain as the plastic part. The model is constructed, the finite element model is established and the bending test is numerically simulated. The verified trend is consistent, and the method is feasible. According to the above method, the concrete is subjected to freeze-thaw cycle and ultraviolet aging, and the finite element model is established by using uniaxial compression test to obtain parameters. The bending test is simulated and the verification method is feasible. With the increase of the number of freeze-thaw cycles and the increase of UV aging time, the maximum bending strain of SBS modified asphalt mixture and matrix asphalt mixture is decreased .The low-temperature performance of SBS modified asphalt mixture is better than that of matrix asphalt mixture. Originality/value - A method of simulating asphalt mixture test by finite element method numerical simulation is established. By using this method, the performance of asphalt mixture is studied, which saves a lot of manpower and material resources. At the same time, this method can be used to study the characteristics of asphalt mixture under complex conditions.
机译：目的 - 沥青混合物广泛用于道路工程，其性能研究尤为重要。但沥青混合料性性能的研究需要大量的测试，例如弯曲试验，分裂试验等。它还需要大量的时间和物质资源。本文的目的是通过有限元数值模拟获得测试结果，并显示这节省了很多人力和物质资源。设计/方法/方法 - 通过单轴压缩测试获得材料的机械参数。根据标称应力和标称菌株计算真正的应力和塑性菌株。建立了构成模型。然后建立了沥青混合物的有限元模型。进行了沥青混合料弯曲试验的数值模拟与性能研究。同时，根据上述方法，沥青混合物进行冻融循环和紫外老化，通过单轴压缩试验获得机械参数。建立了数值模型，以模拟冻融循环和紫外老化后沥青混合料的弯曲特性。调查结果 - 进行沥青混合物的单轴压缩试验，得到标称应力和标称菌株。计算真正的应力和塑料应变，并且弹性模量与泊松比为弹性部件，以及作为塑料部件的真正应力和塑性应变。构造模型，建立有限元模型，数值模拟弯曲试验。经过验证的趋势是一致的，方法是可行的。根据上述方法，将混凝土经受冻融循环和紫外老化，并且通过使用单轴压缩试验建立有限元模型以获得参数。模拟弯曲测试，验证方法是可行的。随着冻融循环循环次数的增加和紫外线老化时间的增加，SBS改性沥青混合物和基质沥青混合料的最大弯曲菌株降低。SBS改性沥青混合物的低温性能优于基质沥青混合料。创意/值 - 建立了通过有限元方法模拟沥青混合料试验的方法数值模拟。通过使用这种方法，研究了沥青混合料的性能，可节省大量的人力和物质资源。同时，该方法可用于研究复杂条件下沥青混合物的特性。

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