Experimental research on creep properties of limestone under fluid–solid coupling

Yang, Lehe; Liu, Changwu; Kang, Yaming; Wang, Ding; Ye, Dingyang

doi:10.1007/s12665-015-4022-6

Cited by 43 publications

(19 citation statements)

References 16 publications

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“…It includes the main functional interfaces such as training subjects, performance evaluation, and other auxiliary functional interface such as system login and user rights management. In order to reduce the complexity of the page and improve its efficiency [15,16], all business processes are excluded while displaying the user interface through JPS pages, and Java scripts are not involved at the same time [17,18].…”

Section: Software Designmentioning

confidence: 99%

RETRACTED ARTICLE: Research on core strength training of aerobics based on artificial intelligence and sensor network

Jia

2020

J Wireless Com Network

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The traditional training system based on case teaching is according to the analysis of past competitions and training cases to carry out the strength training of aerobics special movements. The training results cannot be evaluated intelligently and accurately, and the performance of dynamic analysis is poor. To address this problem, the core training system of strength quality of aerobics special movements based on artificial intelligence is designed to realize the intelligent training of the strength quality of aerobics special movements. Through the study of fuzzy paradigm system, intelligent functions such as optimization and decision-making of intelligent fuzzy network are realized. The design system architecture framework includes the modules of sensor, receiver, database, and analysis decision. The core chip of the system is the main control module of Atmega1280 MCU for manmachine interaction, so as to realize the comprehensive training of the strength quality of aerobics special movements. Information collection module is used to collect information on strength training information such as instrument, movement, and language. The problem of phase distortion in signal transmission process is processed by FIR filter. Through information management module, trainee information management and training results statistics and queries are implemented. In the system software part, the system software structure diagram and system startup and landing procedure are given. By analyzing the working process of the module, the strength of aerobics special movements is analyzed. Experimental results show that the designed system can achieve real-time and stable strength training for aerobics special movements and improve training efficiency.

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Section: Software Designmentioning

confidence: 99%

RETRACTED ARTICLE: Research on core strength training of aerobics based on artificial intelligence and sensor network

Jia

2020

J Wireless Com Network

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“…The results show that the effect of the liquid on the specimen used by Griggs is mainly mechanical, which is related to the pore pressure and the viscosity coefficient of liquid, but not to the immersion time. Wawersik and Brown (1973), Afrouz and Harvey (1974), Yang et al (2014), Liu et al (2015) also performed different tests to verify the effect of pore pressure on the creep of rock.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear creep damage model considering effect of pore pressure and analysis of long-term stability of rock structure

Liu

Wang

et al. 2019

International Journal of Damage Mechanics

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Water changes natural seepage in the surrounding geological environment and weaken rock mass of valley during reservoir impounding, which result in large time-dependent deformation of foundation of dam. A nonlinear creep damage model considering water effect is proposed by taking into account the influence of pore pressure on the spherical stress tensor and yield surface. The elastic-viscoelastic model is consisted of a spring and several cascaded Kelvin models. The model is implemented in the ABAQUS user material subroutine. The accuracy of the model is verified by the triaxial creep test of saturated sandstone and dry sandstone. Then it is applied in the valley contraction analysis during impounding of Xiluodu high arch dam.

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“…In the past several decades, researchers have conducted extensive laboratory investigations on creep behavior of many rocks under uniaxial or triaxial compression (Cristescu et al 1998;Fujii et al 1999;Maranini et al 1999;Sun 1999;Udo et al 1999;Yang et al 1999Yang et al , 2010Ma et al 2006;Zhang et al 2012Zhang et al , 2013. Confining pressure, temperature and groundwater were also considered in the analysis of the creep behavior of rocks (Liang et al 2010;Zhang et al 2012;Liu et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Stress relaxation behavior of silty mudstone considering the effect of confining pressure

Zhang

Liu

et al. 2016

Environ Earth Sci

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Stress relaxation tests under confining pressures of 1 and 5 MPa were performed on saturated silty mudstone obtained from Badong Formation strata in the Three Gorges Reservoir area of China. The effects of confining pressure on the relaxation stage, magnitude, degree, time and average relaxation rate of rocks were analyzed quantitatively according to these tests. The results show the relaxation stage of rocks without change, the relaxation magnitude and average relaxation rate of rocks increase and the relaxation degree and time of rocks decrease as the confining pressure increases. Then, a damage variable was proposed to consider the weakening of rock parameters. A new nonlinear damage model was established by introducing the damage variable into the Hooke-Kelvin model. The Levenberg-Marquardt algorithm was adopted to identify the model parameters of rocks. Based on the identification results, the influence of confining pressure on the viscosity of rocks is the largest, followed by the viscoelasticity; also, that on the instantaneous elasticity of rocks is the smallest. Increase in confining pressure can effectively decrease the damage degree of rocks induced by stress relaxation. Therefore, the confining pressure has significant influences on the stress relaxation behavior of silty mudstone, which should not be ignored in design and construction of major projects.

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Experimental research on creep properties of limestone under fluid–solid coupling

Cited by 43 publications

References 16 publications

RETRACTED ARTICLE: Research on core strength training of aerobics based on artificial intelligence and sensor network

RETRACTED ARTICLE: Research on core strength training of aerobics based on artificial intelligence and sensor network

Nonlinear creep damage model considering effect of pore pressure and analysis of long-term stability of rock structure

Stress relaxation behavior of silty mudstone considering the effect of confining pressure

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