A three-parameter Weibull damage constitutive model for fiber concrete artificial dams in coal mine underground reservoirs

IF 4.5 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Mechanics of Time-Dependent Materials Pub Date : 2026-09-22 DOI:10.1007/s11043-026-09912-1

Tenglong Rong, Yilu Yang, Wen Wang, Lujun Wang, Yihe Yu, Pengfei Nan, Ruixin Niu, Keke Cong

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引用次数: 0

Abstract

Ordinary concrete is characterized by high brittleness and poor crack resistance. The structural reliability of concrete artificial dam in coal mine underground reservoirs (CMUR) under complex conditions cannot be ensured by traditional concrete. Fiber concrete is utilized in the construction of artificial dam in the CMUR is characterized by excellent toughness and crack resistance. In order to investigate the mechanical properties and the damage accrual process of fiber concrete artificial dam under imposed stressing, a damage model for fiber concrete artificial dam in underground coal mine reservoir is proposed. The damage model can present the characteristics of multi-phase component synergistic load-bearing in the fiber concrete matrix-fiber-interfacial transition zone (ITZ) and the random distribution direction of fibers. Meawhile, the damage model is proposed on the basis of statistical damage mechanics, characterized by a three-parameter Weibull distribution. Moreover, the damage model is validated by the experimental results of fiber concrete under uniaxial and triaxial compression. A sensitivity analysis of the Weibull distribution parameters is conducted to examine the influence on the mechanical response and damage evolution in the fiber concrete artificial dam. Additionally, parametric analyses are performed to explore the impacts of fiber orientation intensity, ITZ thickness, and ITZ stiffness on the elastic response of fiber concrete. The research results serve as a theoretical foundation for the design of the fiber concrete artificial dam in the CMUR.

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煤矿地下水库纤维混凝土人工坝三参数Weibull损伤本构模型

普通混凝土的特点是脆性高，抗裂性差。煤矿地下水库混凝土人工坝在复杂条件下的结构可靠性是传统混凝土无法保证的。纤维混凝土以其优异的韧性和抗裂性能被广泛应用于CMUR人工坝的施工中。为了研究纤维混凝土人工坝在受应力作用下的力学性能和损伤形成过程，提出了煤矿地下水库纤维混凝土人工坝的损伤模型。该损伤模型能较好地反映纤维混凝土基体-纤维-界面过渡区（ITZ）多相构件协同承载的特征以及纤维的随机分布方向。同时，提出了基于统计损伤力学的三参数威布尔分布的损伤模型。并通过纤维混凝土在单轴和三轴压缩下的试验结果验证了该模型的有效性。通过威布尔分布参数的敏感性分析，探讨了纤维混凝土人工坝的力学响应和损伤演化规律。此外，还进行了参数分析，探讨纤维取向强度、ITZ厚度和ITZ刚度对纤维混凝土弹性响应的影响。研究结果可为CMUR纤维混凝土人工坝的设计提供理论依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mechanics of Time-Dependent Materials 工程技术-材料科学：表征与测试

CiteScore

4.90

自引率

8.00%

发文量

审稿时长

>12 weeks

期刊介绍： Mechanics of Time-Dependent Materials accepts contributions dealing with the time-dependent mechanical properties of solid polymers, metals, ceramics, concrete, wood, or their composites. It is recognized that certain materials can be in the melt state as function of temperature and/or pressure. Contributions concerned with fundamental issues relating to processing and melt-to-solid transition behaviour are welcome, as are contributions addressing time-dependent failure and fracture phenomena. Manuscripts addressing environmental issues will be considered if they relate to time-dependent mechanical properties. The journal promotes the transfer of knowledge between various disciplines that deal with the properties of time-dependent solid materials but approach these from different angles. Among these disciplines are: Mechanical Engineering, Aerospace Engineering, Chemical Engineering, Rheology, Materials Science, Polymer Physics, Design, and others.