Numerical Investigation of Asphalt Concrete Fracture Based on Heterogeneous Structure and Cohesive Zone Model
نویسندگان
چکیده
The fracture behavior of asphalt concrete is closely related to its internal structure. A deep understanding the relationship between structure and very important for sustainable durable pavement design. In this paper, a CZM-based FE model was developed investigate concrete. An image-aided approach used generate 3-D heterogeneous series 2-D cross sections were extracted from finite element modeling. Then numerical simulations SCB tests conducted validated with experimental results. With model, effects some critical factors, including temperature, loading rate, aggregate geometry, strength, energy, on investigated. analysis results showed that average damage adhesive elements higher than cohesive at peak load. At lower temperatures, tends crack earlier, cracking path be marginally closer aggregates. rate may induce more, but minor, since CZM in mortar cannot bear much more stress through deformation. Angular aggregates percentage damaged elements, especially adhesive-damaged elements. On average, each 10% increase energy allows specimen 2.31% load 2.82% displacement. Sufficient could improve ability resist fracture.
منابع مشابه
δ25 Crack opening displacement parameter in cohesive zone models: experiments and simulations in asphalt concrete
متن کامل
Numerical Study on the Asphalt Concrete Structure for Blast and Impact Load Using the Karagozian and Case Concrete Model
The behaviour of an asphalt concrete structure subjected to severe loading, such as blast and impact loadings, is becoming critical for safety and anti-terrorist reasons. With the development of high-speed computational capabilities, it is possible to carry out the numerical simulation of an asphalt concrete structure subjected to blast or impact loading. In the simulation, the constitutive mod...
متن کاملCohesive fracture model for functionally graded fiber reinforced concrete
a r t i c l e i n f o Keywords: Concrete (E) Fiber reinforced concrete (FRC) (E) Constitutive relationship (C) Cohesive fracture (C) Fracture energy (C) A simple, effective, and practical constitutive model for cohesive fracture of fiber reinforced concrete is proposed by differentiating the aggregate bridging zone and the fiber bridging zone. The aggregate bridging zone is related to the total...
متن کاملmortality forecasting based on lee-carter model
over the past decades a number of approaches have been applied for forecasting mortality. in 1992, a new method for long-run forecast of the level and age pattern of mortality was published by lee and carter. this method was welcomed by many authors so it was extended through a wider class of generalized, parametric and nonlinear model. this model represents one of the most influential recent d...
15 صفحه اولSimulation of the Mode I fracture of concrete beam with cohesive models
Crack propagation modeling in quasi-brittle materials such as concrete is essential for improving the reliability and load-bearing capacity assessment. Crack propagation explains many failure characteristics of concrete structures using the fracture mechanics approach. This approach could better explain the softening behavior of concrete structures. A great effort has been made in developing nu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied sciences
سال: 2022
ISSN: ['2076-3417']
DOI: https://doi.org/10.3390/app122111150