Investigating the effect of initial cracks on the mudstone mechanical behavior under uniaxial compression using FDEM

Li, Dejian; Qi, Hao; Li, Chunxiao

doi:10.1007/s10409-023-22421-x

Cited by 5 publications

(1 citation statement)

References 38 publications

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“…Li et al [39] conducted a step-by-step incremental loading test that demonstrated the loading rate to be negatively correlated with the force adjustment time. Li et al [40] and Fan [41] reported that with increasing loading rates, the creep deformation and rate gradually increased, and the creep rate of mudstone gradually attenuated with time.…”

Section: Introductionmentioning

confidence: 99%

Creep and Hardening Characteristics of Anthracite under Graded Static–Dynamic Coupled Loading

Yue,

Wang,

Zhang

et al. 2023

Applied Sciences

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Remaining coal pillars in remining areas exhibit clear creep characteristics, and dynamic pressure accelerates their instability and failure. The creep and hardening characteristics of coal under dynamic pressure are of great engineering significance for the stability of remaining coal pillars in remining areas and their control. To investigate the creep and hardening characteristics of anthracite under static–dynamic coupled loading, graded loading creep tests with different loading rates were conducted. In this research, the creep strain, instantaneous elastic modulus, and creep rate of anthracite were studied under different graded loading rates. The results showed that the hardening effect of the samples manifested as an increasing instantaneous elastic modulus at the loading stage and a decreasing strain rate at the creep stage. When the graded loading rate increases from 0.01 to 0.1 mm/s, the instantaneous elastic modulus increases by 0.16–2.32 times. The sudden increase in the instantaneous elastic modulus at the failure stress level explains the instantaneous failure of the samples well. The actual yield levels corresponding to the peak instantaneous elastic modulus of the samples linearly decreased with increasing graded loading rate. The functional relationship between the graded loading rate and the elastic modulus hardening coefficient, the actual yield stress, and the strain rate decay coefficient were established, which could quantitatively describe the influence of different graded loading rates on the creep and hardening characteristics of anthracite and predict its creep damage.

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Section: Introductionmentioning

confidence: 99%