Consolidation creep behavior and constitutive modeling of red-stratum mudstone fill material

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

Mechanics of Time-Dependent Materials Pub Date : 2026-02-25 DOI:10.1007/s11043-026-09857-5

Kangyun Sang, Ping Sun, Ran Li, Shuai Zhang, Xin Zhong

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引用次数: 0

Abstract

The creep behavior of red-stratum mudstone plays a critical role in the long-term stability and safety of major engineering projects, making a systematic investigation of its consolidation creep characteristics of significant engineering relevance. In this paper, one-dimensional consolidation creep experiments were conducted on red-stratum mudstone using an incremental loading method to determine the effects of initial dry mass density, moisture content, and normal stress on its consolidation creep behavior. Based on the observed characteristics of the consolidation creep curves, a hyperbolic empirical consolidation creep constitutive model incorporating the effects of initial dry density, moisture content, and normal stress was developed. The experimental results indicate that the consolidation creep behavior of red-stratum mudstone can be divided into three stages: instantaneous creep, decelerated creep, and stable creep. Higher moisture content, lower initial dry density, and greater normal stress result in increased total deformation, larger secondary consolidation coefficients, and longer durations to reach creep stability. The proposed constitutive model accurately captures the consolidation creep characteristics of red-stratum mudstone, providing a theoretical basis for assessing and improving geological safety in red-mudstone engineering regions.

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红层泥岩填料固结蠕变特性及本构模型

红层泥岩的蠕变特性对重大工程的长期稳定和安全起着至关重要的作用，系统研究其固结蠕变特性具有重要的工程意义。本文采用增量加载法对红层泥岩进行一维固结蠕变试验，确定初始干质量密度、含水率和正应力对其固结蠕变行为的影响。基于观察到的固结蠕变曲线特征，建立了考虑初始干密度、含水率和正应力影响的双曲经验固结蠕变本构模型。试验结果表明，红层泥岩固结蠕变行为可分为瞬时蠕变、减速蠕变和稳定蠕变3个阶段。较高的含水率、较低的初始干密度和较大的正应力会导致总变形增加、二次固结系数增大、达到蠕变稳定所需的时间延长。所建立的本构模型准确地反映了红层泥岩的固结蠕变特征，为评价和提高红层泥岩工程区的地质安全性提供了理论依据。

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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.