基于近场动力学方法的泡沫混凝土单轴拉伸三维数值模拟

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发布时间：2020-01-06 00:00:00

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基于近场动力学方法的泡沫混凝土单轴拉伸三维数值模拟

Three-dimensional Numerical Simulation of Foamed Concrete Under Uniaxial Tension Based on Peridynamics

2023年第2期

泡沫混凝土；近场动力学；单轴拉伸；孔隙形状；三维数值模拟

Foamed concrete; Peridynamics; Uniaxial tension; Pore shape; Three-dimensional numerical simulaiton

2023年第2期

10.19761/j.1000-4637.2023.02.068.05

上海市科委课题项目（20QB1403700、21DZ1203200）。

饶烽瑞

上海建工二建集团有限公司，上海 200090

饶烽瑞

饶烽瑞.基于近场动力学方法的泡沫混凝土单轴拉伸三维数值模拟[J].混凝土与水泥制品,2023(2):68-72.

RAO F R.Three-dimensional Numerical Simulation of Foamed Concrete Under Uniaxial Tension Based on Peridynamics[J].China Concrete and Cement Products,2023(2):68-72.

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摘要：采用近场动力学方法模拟了泡沫混凝土三维模型的单轴拉伸，通过与文献数据对比验证了数值模拟的有效性。基于对孔隙率为30%~70%、单元孔隙球度为0.6~1.0的泡沫混凝土三维模型的模拟结果，探讨了泡沫混凝土的孔隙结构对抗拉性能的影响。结果表明：泡沫混凝土的抗拉性能（弹性模量、强度和断裂能）随着孔隙率的增加而降低，随着单元孔隙球度的增加而提升。泡沫混凝土三维模型的抗拉性能具有显著的非均质性，这是由于孔隙随机分布导致不同模型的水泥骨架壁厚级配不同所致，在壁厚较薄的局部区域容易造成应力集中，从而削弱泡沫混凝土的抗拉性能。 Abstract: The peridynamics was used to simulate the uniaxial tension of the three-dimensional foamed concrete model, and the validity of the numerical simulation was verified by comparing with experimental datas. Based on the simulation results of the three-dimensional foamed concrete model with porosity of 30%~70% and single pore sphericity of 0.6~1.0, the influence of the pore structure of foamed concrete on its tensile properties was discussed. The results show that the tensile properties(elastic modulus, strength and fracture energy) decrease with the increase of porosity, and increase with the increase of single pore sphericity. The tensile properties of the three-dimensional foamed concrete model have significant heterogeneity, which is due to the random distribution of pores leading to different cement skeleton wall thickness gradations of different models. It is easy to cause stress concentration in local areas with thinner wall thickness, thus weakening the tensile properties of foamed concrete.

英文名 : Three-dimensional Numerical Simulation of Foamed Concrete Under Uniaxial Tension Based on Peridynamics

刊期 : 2023年第2期

关键词 : 泡沫混凝土；近场动力学；单轴拉伸；孔隙形状；三维数值模拟

Key words : Foamed concrete; Peridynamics; Uniaxial tension; Pore shape; Three-dimensional numerical simulaiton

刊期 : 2023年第2期

DOI : 10.19761/j.1000-4637.2023.02.068.05

文章编号 :

基金项目 : 上海市科委课题项目（20QB1403700、21DZ1203200）。

作者 : 饶烽瑞

单位 : 上海建工二建集团有限公司，上海 200090

饶烽瑞

饶烽瑞.基于近场动力学方法的泡沫混凝土单轴拉伸三维数值模拟[J].混凝土与水泥制品,2023(2):68-72.

RAO F R.Three-dimensional Numerical Simulation of Foamed Concrete Under Uniaxial Tension Based on Peridynamics[J].China Concrete and Cement Products,2023(2):68-72.

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摘要

参数

结论

参考文献

引用本文

Abstract: The peridynamics was used to simulate the uniaxial tension of the three-dimensional foamed concrete model, and the validity of the numerical simulation was verified by comparing with experimental datas. Based on the simulation results of the three-dimensional foamed concrete model with porosity of 30%~70% and single pore sphericity of 0.6~1.0, the influence of the pore structure of foamed concrete on its tensile properties was discussed. The results show that the tensile properties(elastic modulus, strength and fracture energy) decrease with the increase of porosity, and increase with the increase of single pore sphericity. The tensile properties of the three-dimensional foamed concrete model have significant heterogeneity, which is due to the random distribution of pores leading to different cement skeleton wall thickness gradations of different models. It is easy to cause stress concentration in local areas with thinner wall thickness, thus weakening the tensile properties of foamed concrete.

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基于近场动力学方法的泡沫混凝土单轴拉伸三维数值模拟

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