摘要
在不同温度和应变速率条件下,对天然气水合物沉积物进行三轴压缩试验。试验结果表明:(1)温度越低,水合物沉积物破坏强度越大,在一定温度范围内可用线性表示。随着温度的进一步降低,破坏强度的增加趋势有所减小,最终趋于定值;(2)水合物沉积物试样的破坏强度随着应变速率的增大而增大。另外,应变速率可明显的改变材料的塑性性能。(3)割线模量E50随着温度的降低线性增加。
A triaxial compression test for gas hydrate sediment is conducted under different temperatures and strain rate conditionss.Results show that:(1) the lower the temperature,the greater the failure strength of sediment,which can be represented by linear functions within certain temperature range.With temperature going further down,a trend for increasing failure strength decreases,and finally tends to be constant;(2) failure strength increases with an increase of strain rate.In addition,strain rate can significantly change the plastic property of materials;and(3) secant modulus(E 50) increases with a decrease of temperature.
出处
《天然气勘探与开发》
2012年第1期50-53,82,共4页
Natural Gas Exploration and Development
基金
国家科技重大专项(2008ZX05026-004)
国家"863"计划重大项目(2006AA09209)
国家自然科学基金(91010015)联合资助
