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- W2979983507 abstract "Abstract Studying the micromechanical properties of gas-bearing shale is very important for understanding it. In the nanoindentation measurement of gas-bearing shale, the load-displacement curve often shows pop-in at the loading stage, namely the change of load is small but the change of penetration depth is large. Pop-in can introduce a large error in the calculation of the mechanical parameter. To investigate the influence factors of pop-in, the maximum load, load rate and sample characteristics have been addressed. The results show that pop-in is related to cracks and pores in the shale. Due to the heterogeneity of shale, pop-in cannot be avoided, but can be reduced by choosing reliable load modes and test parameters. Pop-in can increase the maximum indentation depth and decrease the elastic modulus and hardness. The influence of pop-in on hardness is larger than on the elastic modulus. At a high load rate it is easy to induce pop-in. The influence of the load rate on pop-in is larger than that of the maximum load." @default.
- W2979983507 created "2019-10-18" @default.
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- W2979983507 date "2019-09-26" @default.
- W2979983507 modified "2023-09-26" @default.
- W2979983507 title "Influence factors of pop-in in the nanoindentation micromechanical property measurement of gas-bearing shale" @default.
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- W2979983507 doi "https://doi.org/10.3139/120.111410" @default.
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