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相关概念视频

Shape and Texture of Coarse Aggregate01:25

Shape and Texture of Coarse Aggregate

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Aggregate shape is classified based on the relative sharpness or roundness of the edges and corners. This classification includes categories like rounded, angular, elongated, and flaky, each with specific characteristics. Rounded aggregates, fully shaped by attrition, are typical of river or seashore gravel, while angular aggregates, such as crushed rock, have well-defined edges. Aggregates that are elongated and flaky are less desirable, as they can reduce the workability and strength of...
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Porosity and Absorption of Aggregate01:20

Porosity and Absorption of Aggregate

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Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the...
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相关实验视频

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An Efficient and Flexible Cell Aggregation Method for 3D Spheroid Production
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简单的hypo-sand:一个简单的hypoplastic模型用于颗粒材料和SPH实施.

Shun Wang1,2, Hong-Jie Fang1,2, Xuan Kang3

  • 1State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan, China.

Acta geotechnica
|July 26, 2024
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概括

一个新的低塑性模型使用7个参数来模拟颗粒物质的行为. 这种模型准确地捕捉了各种低和高应变率场景中的土壤力学.

关键词:
临界状态 临界状态颗粒状物质是一种颗粒状物质.低塑性模型的模型.数字模拟 数字模拟平滑的粒子水力动力学.

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相关实验视频

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科学领域:

  • 地质技术工程 地质技术工程
  • 计算力学 计算力学 计算力学
  • 材料科学 是一种材料科学.

背景情况:

  • 精确的颗粒材料建模对于地质工程应用至关重要.
  • 现有的模型往往需要许多参数或与复杂的行为作斗争.
  • 需要有效且强大的土壤力学构成模型.

研究的目的:

  • 介绍一种用于颗粒材料的新型低塑性模型.
  • 开发一个计算效率高的数值实现.
  • 在各种负载条件下验证模型的预测能力.

主要方法:

  • 用7个材料参数制定一个简单的低塑性构成模型.
  • 使用显式集成和应力校正算法进行数值实现.
  • 在光滑粒子水力学 (SPH) 框架内应用.

主要成果:

  • 该模型成功地捕获了颗粒状材料的关键机械行为.
  • 模拟显示了三轴和简单剪切测试在低张力率的准确预测.
  • 该模型有效地复制复杂的现象,如颗粒崩,刚性透和高应变率的山体滑坡.

结论:

  • 拟议的低可塑性模型为模拟土壤行为提供了一个节但强大的工具.
  • 数字方法确保了计算效率和稳定性.
  • 这个模型为地质技术分析和设计提供了宝贵的进步.