泥质粉砂岩蠕变特性及非线性蠕变模型研究
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张子洋,曹平,刘智振,肖峰
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Study on Creep Characteristics and Nonlinear Creep Model of Argillaceous Siltstone
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Ziyang ZHANG,Ping CAO,Zhizhen LIU,Feng XIAO
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表4 不同应力水平下改进非线性黏弹塑性蠕变模型拟合参数
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Table 4 Improved nonlinear viscoelastic-plastic creep model fitting parameters under different stress levels
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| 应力水平/MPa | E0/MPa | E1/MPa | η1/（GPa·s） | η2/（×104 GPa·s） | A | B | m/（×103） | R2 |
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| 6 | 6.3 | 54.7 | 0 | 2.1 | -0.68 | 1.1 | 2.200 | 0.994 | | 8 | 189.7 | 117.8 | 269.7 | 54.8 | -0.01 | 2.2 | 0.010 | 0.975 | | 10 | 3.3 | 103.4 | 117.2 | 3.5 | 321.48 | -322.5 | -2 236.000 | 0.993 | | 12 | 2.0 | 3.4 | 0.7 | 1.9 | 0.87 | 0.6 | 0.001 | 0.995 | | 14 | 2.2 | 3.6 | 1.9 | 2.4 | 1.75 | 4.1 | 0.001 | 0.994 | | 16 | 1.5 | 2.5 | 2.3 | 1.6 | 0.76 | 0.2 | 0.002 | 0.995 | | 18 | 6.3 | 2 086.9 | 0 | 4.8 | -0.13 | 0.4 | 5.200 | 0.996 | | 20 | 184.2 | 93.1 | 3 327.3 | 0.1 | 17.74 | 14.4 | 1 120.100 | 0.995 |
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