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| Mechanical Behavior of Frozen Soil with Uniaxial Dynamic Loading |
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Abstract Investigation of dynamic behavior of frozen soil is of great importance to artificial ground freezing method in underground engineering, etc. In this article, split Hopkinson pressure bar (SHPB) is employed to investigate the dynamic character of artificial frozen soil under uni-axial stress condition. Tests are conducted at the temperature of -3, -8,-13,- 17,-23 and -28℃ and strain rates from 300 to 1200s-1. The stress-strain curves at different conditions were obtained. The uni-axial stress-strain curves of frozen soil show brittle character. The compressive strength of frozen soil shows positive strain-rate and negative temperature sensitivity，and the final strain of frozen soil shows positive strain-rate sensitivity over the range of strain rates and temperature employed. The thermal effect of frozen soil is greater with higher loading strain rates. The strain rates sensitivity of frozen soil is higher with lower temperature. The viscoelastic damage model mentioned in this article can describe the stress strain relation of frozen soil under dynamic loading.
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Received: 11 December 2012
Published: 28 February 2014
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| Fund:;Open Funds of State Key Laboratory of Frozen Soil Engineering;Fundamental Research Funds for the Central Universities |
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Corresponding Authors:
Zhu Zhi-Zhu
E-mail: zzw4455@163.com
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| [1] |
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| [2] |
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| [3] |
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| [4] |
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| [5] |
. Numerical simulation of damage in fiber reinforced composite laminates under high velocity impact[J]. , 2012, 33(5): 493-500. |
| [6] |
. Study and Prediction of Compression Deformation Behavior for Pure Sintered Mo Powder[J]. , 2012, 33(3): 331-335. |
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2014, Vol. 35 
