关于青材料多尺度建模的初步研究:通过基于RVE的方法评估材料行为
Ahmed Ibrahim Hassanin Mohamed1, Oliver Giraldo-Londoño1, Baolin Deng1
1Department of Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA.
Materials (Basel, Switzerland)
|October 26, 2024
概括
这项研究确定了青建模的最佳代表体积元件 (RVE) 尺寸. 这确保了对青路面材料行为和故障演变的准确模拟,平衡计算效率和高保真度断裂分析.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 计算力学 计算力学 计算力学
背景情况:
- 了解青混合物的机械行为对于路面性能至关重要.
- 多尺度建模对于异质青的高准确度断裂分析至关重要.
- 代表体积元件 (RVE) 尺寸选择是青建模中的一个关键挑战.
研究的目的:
- 为青混合物开发一个多尺度的有限元素建模方法.
- 为了确定最佳的RVE大小,准确地建模青的断裂.
- 提高对青路面构成与性能关系的理解.
主要方法:
- 采用了基于微结构的有限元模型.
- 同质化弹性特性的融合分析确定了最佳的RVE大小.
- 不同质的模型包括粘弹性,线性弹性聚合物和凝聚性区域建模.
主要成果:
- 最佳的RVE长度被确定为32-34毫米,对于12.5毫米的名义最大总体尺寸 (NMAS).
- 计算模型准确地复制了间接拉力青裂纹测试中的实验数据.
- 微观和宏观层面的分析提供了对材料行为和故障演变的见解.
结论:
- 拟议的方法可以确定最佳的RVE大小,以提高计算效率而不会牺牲准确性.
- 这种方法增强了在操作条件下对青路面材料行为的理解.
- 该研究为青混合物的多尺度建模提供了经过验证的框架.
相关概念视频
Response Surface Methodology
95
Response Surface Methodology (RSM) is a collection of statistical and mathematical techniques used to develop, improve, and optimize processes. It is particularly valuable when many input variables or factors potentially influence a response variable.
The process of RSM involves several key steps:
The process of RSM involves several key steps:
95
Rapidly Varying Flow
53
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
53
Masonry Paving
250
The construction of masonry paving involves using materials such as bricks, stones, and concrete masonry units. These materials are chosen for their shape, color, strength, and resistance to abrasion and weathering. Masonry units can be installed dry on a thin layer of sand and a gravel base, or they can be embedded in mortar or asphalt on a concrete slab. For areas subjected to heavy vehicular loads, a rigid base layer of reinforced or unreinforced concrete is recommended. In contrast,...
250


