| AMD蚀化下砂岩的损伤本构模型 |
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| 引用本文： | 姜立春,温勇. AMD蚀化下砂岩的损伤本构模型[J]. 中南大学学报(自然科学版), 2011, 42(11) |
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| 作者姓名： | 姜立春 温勇 |
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| 作者单位： | 华南理工大学安全科学与工程研究所,广东广州,510640 |
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| 基金项目： | 教育部高校博士点新教师基金资助项目，中央高校基本科研业务费自主选题项目，国家自然科学基金重点资助项目，国家自然科学基金资助项目 |
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| 摘 要： | 通过酸性矿山排泄水(AMD)蚀化砂岩的力学性质研究,利用Weibull函数分析砂岩微元体强度分布特征,导出单轴压缩下砂岩的损伤本构关系；基于AMD蚀化下砂岩主要胶结物含量的变化,引入砂岩化学损伤变量,得到蚀化后砂岩的等效弹性模量；根据推广的Lemaitre应变等效原理,建立AMD蚀化下砂岩的损伤本构模型.利用现场采集的pH为1.07和3.26的AMD溶液蚀化下砂岩单轴抗压试验,以及文献[7]中人工配制pH为3.0和5.0酸液溶蚀砂岩试验结果,分别检验所建本构模型的合理性.结果表明:模型预测曲线与试验结果曲线基本吻合,较客观地反映AMD蚀化下砂岩的损伤演化特性.
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| 关 键 词： | 岩石力学 酸性矿山排泄水 化学损伤 本构模型 Weibull分布 |
Damage constitutive model of sandstone during corrosion by AMD |
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| JIANG Li-chun,WEN Yong. Damage constitutive model of sandstone during corrosion by AMD[J]. Journal of Central South University:Science and Technology, 2011, 42(11) |
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| Authors: | JIANG Li-chun WEN Yong |
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| Affiliation: | JIANG Li-chun,WEN Yong (Institute of Safety Science and Engineering,South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | Based on the study of mechanical properties of sandstone during corrosion by acid mine drainage(AMD),Weibull function was used to express the distribution of microelement strength of sandstone and a damage constitutive model under uniaxial compression was obtained.A chemical damage variable was introduced based on the variety of main cement and equivalent elastic modulus of sandstone was obtained under corrosion by AMD.Then,a damage constitutive model of sandstone during corrosion by AMD was established by ... |
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| Keywords: | rock mechanics acid mine drainage(AMD) chemical damage constitutive model Weibull distribution |
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