A new mechanical model for soft rock rheology

CHEN Yuan-jiang; PAN Chang-liang; CAO Ping; WANG Wen-xing

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A new mechanical model for soft rock rheology

更新时间：2026-06-25

- A new mechanical model for soft rock rheology
- Vol. 24, Issue 2, (2003)
- 作者机构：
  
  中南大学资源与安全工程学院,湖南,长沙,410083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU457
- Online First：19 August 2014，
  
  Published：2003
- 稿件说明：
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CHEN Yuan-jiang, PAN Chang-liang, CAO Ping, et al. A new mechanical model for soft rock rheology[J]. 2003, 24(2).
DOI：

CHEN Yuan-jiang, PAN Chang-liang, CAO Ping, et al. A new mechanical model for soft rock rheology[J]. 2003, 24(2). DOI：

摘要

软岩在低应力水平下表现为弹性和粘弹性；在较高的应力水平下表现为弹性、塑性和粘弹性；在高应力水平下表现为弹性、塑性、粘弹性和粘塑性。为了对其进行全面描述，首先，提出了两种非线性元件-蠕变体和裂隙塑性体，并将它们和描述衰减蠕变特性的开尔文体及描述瞬弹性的虎克体相结合，得到了一种新的复合流变力学模型。然后，通过其采用的软岩蠕变的分级增量循环加卸载试验证明，该模型可很好地描述软岩在不同应力水平下的蠕变特性特别是裂隙闭合阶段和加速蠕变阶段的特性，可在工程实际中推广应用。

Abstract

Soft rock would display the characteristics of elasticity and viscoelasticity under low stress

of elasticity

plasticity and viscoelasticity under higher stress and of elasticity

plasticity

viscoelasticity and viscoplasticity under very high stress .In order to describe these characteristics comprehensively

firstly the paper brought forward two nonlinear components of creep body and plastic cranny body

and combined them with KELVIN body describing the deceleration creep and HOKE body describing the instantaneous elasticity to gain a new multiple rheological model .Then it used the model to simulate the results of the multi-step incremental cycling loading and unloading creep test of soft rock and drew a conclusion that the new model could effectively describe the creep properties of soft rock under different stress level

especially the properties of the cranny-closed phase and the creep-accelerated phase so that it could be popularly used in engineering practice.

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Related Institution

State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechancis, Chinese Academy of Sciences

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College of Mechanics and Engineering, Liaoning Technical University

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