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蒋明镜, 李晨辉, 刘蔚, 张安, 张学文. 不同胶结半径的粒间胶结拉伸和压缩试验研究[J]. 岩土工程学报, 2018, 40(S2): 12-16. DOI: 10.11779/CJGE2018S2003
引用本文: 蒋明镜, 李晨辉, 刘蔚, 张安, 张学文. 不同胶结半径的粒间胶结拉伸和压缩试验研究[J]. 岩土工程学报, 2018, 40(S2): 12-16. DOI: 10.11779/CJGE2018S2003
JIANG Ming-jing, LI Chen-hui, LIU Wei, ZHANG An, ZHANG Xue-wen. Extension and compression tests mechanical behaviors of bonded granules with different bond widths[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 12-16. DOI: 10.11779/CJGE2018S2003
Citation: JIANG Ming-jing, LI Chen-hui, LIU Wei, ZHANG An, ZHANG Xue-wen. Extension and compression tests mechanical behaviors of bonded granules with different bond widths[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 12-16. DOI: 10.11779/CJGE2018S2003

不同胶结半径的粒间胶结拉伸和压缩试验研究

Extension and compression tests mechanical behaviors of bonded granules with different bond widths

  • 摘要: 为在三维离散元模型中建立考虑胶结半径的胶结破坏准则,在已有10 mm胶结半径的三维铝球胶结试验的基础上,继续对胶结半径为8,12,14 mm的胶结铝球进行拉伸和压缩试验。结合10 mm胶结半径的试验数据,总结出不同胶结半径的胶结铝球拉伸与压缩的强度规律。试验结果表明:高铝水泥试样的拉伸强度与压缩强度随着胶结半径的增大而非线性增大;位移曲线在拉伸荷载下表现为脆性破坏,在压缩荷载下表现脆塑性和塑性破坏,并且压缩荷载下发生脆塑性破坏的概率随着胶结半径的减小而增大。

     

    Abstract: In order to establish a new bond failure criterion considering different bonded widths to be used in three-dimensional distinct element modelling, another three kinds of bond widths (i.e., 8, 12 and 14 mm) between granules are investigated based on the previous work. Then, a series of extension and compression tests are carried out on cemented aluminum balls with three different bond widths, from which the bond failure criteria are obtained considering different bonded widths under tension and compression. The test results show that the tensile and compressive strengths both increase non-linearly with the bond width. The curves of the relationship between the tension and normal displacement exhibit elastic brittle failure. However, those between the compression and normal displacement are influenced by the bond width. The curves more probably show plastic failure if the bond width is larger, while those of the specimens with smaller bond width more probably show brittle-plastic failure.

     

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