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含甲烷水合物冰的力学行为试验研究

发表时间:2013-02-15  浏览量:1237  下载量:507
全部作者: 赵红华,李洋辉,刘卫国,宋永臣
作者单位: 大连理工大学运载工程学部,工业装备与结构分析国家重点实验室;大连理工大学能源与动力学院,海洋能源利用与节能实验室
摘 要: 为研究甲烷水合物的存在对冰力学行为的影响,使用了高压、低温的三轴压缩试验机,研究了含甲烷水合物冰的应力-应变关系和强度。试验结果证明:1) 随着温度的降低,强度升高;2) 应力-应变关系显示了弹塑性应变硬化行为。当围压小于10 MPa时,强度随着围压的增大而增加,在围压超过10 MPa时,强度反而会随着围压升高而降低。基于上述试验结果,提出了分段线性强度准则。
关 键 词: 工程力学;冰;甲烷水合物;应力-应变关系;强度;屈服准则
Title: Investigation on the mechanical behavior of ice containing methane hydrate
Author: ZHAO Honghua, LI Yanghui, LIU Weiguo, SONG Yongchen
Organization: Faculty of Vehicle Engineering and Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology; School of Energy, Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology
Abstract: In order to study the influence of methane hydrate on the mechnical behavior of ice, the stress-strain relationship and strength of ice containing methane hydrate were studied using a high-pressure and low-temperature triaxial testing apparatus. The results showed that: 1) The strength increased with decrease of temperature; 2) The stress-strain relationship showed an elasto-plastic strain-hardening behavior. When the confining pressure was less than 10 MPa, the strength increased with confining pressure. While it decreased with further increase of confining pressure beyond 10 MPa. Based on the above experimental testing results, a bi-linear strength criteria was proposed.
Key words: engineering mechanics; ice; methane hydrate; stress-strain relationship; strength; yield criteria
发表期数: 2013年2月第3期
引用格式: 赵红华,李洋辉,刘卫国,等. 含甲烷水合物冰的力学行为试验研究[J]. 中国科技论文在线精品论文,2013,6(3):256-262.
 
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