| 泥质盐岩单轴蠕变寿命研究 |
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| 引用本文： | 许宏发,马语卿,杨耀然,吕亚茹,耿汉生.泥质盐岩单轴蠕变寿命研究[J].应用数学和力学,2019,40(5):527-535. |
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| 作者姓名： | 许宏发 马语卿 杨耀然 吕亚茹 耿汉生 |
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| 作者单位： | 陆军工程大学 爆炸冲击防灾减灾国家重点实验室, 南京 210007 |
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| 基金项目： | 江苏省自然科学基金（BK20171399） |
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| 摘 要： | 岩石流变力学的研究中，蠕变寿命是一个重要问题.由于长期蠕变试验资料的缺乏，难以估计蠕变破坏时间.该文进行了泥质盐岩单轴全应力 应变压缩试验，并采用陈氏加载法进行了单轴蠕变试验.对蠕变曲线进行了处理，获得了不同应力水平下的蠕变曲线簇，进而得到了等时应力-应变曲线簇.通过拟合分析，建立了等时应力-应变曲线割线模量随时间变化关系模型和等时应力 应变曲线的数学模型.对等时应力 应变曲线与全应力-应变曲线之间的关系进行了分析，获得了蠕变破坏强度和破坏应变分别与蠕变寿命之间的数学表达式.该文研究成果可以估计泥质盐岩的蠕变寿命、长期强度、长期模量、蠕变破坏线和蠕变终止线，对相关岩石流变寿命的估计具有借鉴意义.
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| 关 键 词： | 泥质盐岩 蠕变寿命 时效强度 时效模量 蠕变破坏线 蠕变终止线 |
| 收稿时间： | 2018-08-31 |
Creep Lifetime Evaluation of Muddy Salt Rock |
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| Affiliation: | State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Nanjing 210007, P.R.China |
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| Abstract: | The creep life is an important problem in the research of rock rheology. For the lack of long-term creep experiment data, the creep rupture time is difficult to estimate. The complete stress-strain uniaxial compression experiment of the muddy salt rock was conducted, and the uniaxial creep test with the Chen method was done. The creep curve cluster under different stress levels was gained through processing of the creep curves, thereby the isochronal stress-strain curve cluster was obtained. Based on the fitting analysis, the variation law for the secant modulus of isochronal stress-strain curves with time and the mathematical model for isochronal stress-strain curves were established. The relationship between isochronal stress-strain curves and the complete stress-strain curve was considered to get the mathematical expressions of the creep failure strength and failure strain with the creep lifetime respectively. The research results can be used to estimate the creep lifetime, the long-term strength, the long-term elastic modulus, the creep failure line and the termination line of muddy salt rock, also make a reference for the estimation of the creep lifetime of similar rocks. |
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