Calculation method of dynamic mechanical parameters of asphalt mixture based on three-dimensional crosslinking network

A technology of asphalt mixture and three-dimensional cross-linking, which is applied in calculation, computer-aided design, electrical and digital data processing, etc., can solve problems such as deviation of results, and achieve the effect of reducing dependence on experimental data, suitable for promotion, and accurate fitting results.

Active Publication Date: 2021-06-01
SOUTHEAST UNIV
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Problems solved by technology

This will directly lead to large deviations in the results when studying the structural dynamic response caused by the application of dynamic loads

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  • Calculation method of dynamic mechanical parameters of asphalt mixture based on three-dimensional crosslinking network
  • Calculation method of dynamic mechanical parameters of asphalt mixture based on three-dimensional crosslinking network
  • Calculation method of dynamic mechanical parameters of asphalt mixture based on three-dimensional crosslinking network

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Embodiment Construction

[0074] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

[0075] The research on the constitutive model of asphalt mixture provides directional guidance for analyzing the viscoelastic properties of polymer matrix composites from the molecular chain level. In particular, how to effectively use the stress-strain results under dynamic loads to reasonably evaluate the viscoelastic properties of asphalt mixtures in three-dimensional space has gradually become the main direction in the field of road materials. However, how to establish a three-dimensional cross-linked network model, how to use the upper-level cross-linked network model to conduct research on the molecular chain level, and realize the expansion from two-dimensional plane to th...

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Abstract

A calculation method of dynamic mechanical parameters of asphalt mixture based on three-dimensional cross-linking network. According to the stress-strain characteristics of different components, a three-dimensional network model is established. Combined with the load test data, the energy of each single chain structure in the network model is The parameters under different stress-strain loading states are fitted to obtain the corresponding dynamic mechanical functions of the asphalt mixture, and then the dynamic mechanical parameters are calculated and determined. The invention fully considers the influence of different components of the asphalt mixture, independently establishes three-dimensional cross-linking networks for different components in the asphalt mixture, and evaluates the influence of different components on the overall stress-strain characteristics of the mixture. Through the establishment of the cross-linking network, the present invention can realize the expansion from the microcosm to the macrocosm from the molecular chain energy connection of the microstructure to the macroscopic performance characterization of the material under the action of dynamic load, and the fitting result is more accurate. At the same time, the dependence on test data is correspondingly reduced, the test cost is low, and it is suitable for promotion.

Description

technical field [0001] The invention relates to the technical field of road materials, in particular to a method for calculating dynamic mechanical parameters of asphalt mixtures. Background technique [0002] As a common road engineering material, the dynamic mechanical properties of asphalt mixture in actual use usually contain both elastic solid and viscous fluid characteristics. Under the action of load, it will reflect the deformation of two different mechanisms of elasticity and viscosity at the same time. Therefore, the analysis of its viscoelastic properties has always been an important part of the research on the performance of asphalt mixture materials. [0003] As a multiphase body composed of pores, asphalt, aggregates, etc., due to the differences in the internal composition, the respective properties of different composite phases of the asphalt mixture will affect the comprehensive viscoelastic properties of the overall mixture. [0004] On the one hand, high...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F119/14
CPCG06F30/13G06F2119/06
Inventor 张磊谌偲翔
Owner SOUTHEAST UNIV
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