Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Engineering
Hysteresis Effect And Damping Characteristics Of Shale Under Saturated And Natural States, Chang-Bao Jiang, Cai Wei, Min-Ke Duan, Yu-Fei Chen, Tang Yu, Zheng-Ke Li
Hysteresis Effect And Damping Characteristics Of Shale Under Saturated And Natural States, Chang-Bao Jiang, Cai Wei, Min-Ke Duan, Yu-Fei Chen, Tang Yu, Zheng-Ke Li
Rock and Soil Mechanics
An RLW-2000 micro-computer servo-control rock triaxial testing machine was used to carry out triaxial cyclic loading and unloading experiments of saturated and natural shales under different confining pressures. The mechanical properties and hysteresis effects of two hydrated shales were analyzed. The evolution law of the damping ratio was discussed based on the energy principle. The experimental results show that as the cycle number increases, the cumulative residual strain increases gradually. The relative residual strain decreases first and then tends to a stable region, and finally increases rapidly prior to the rock damage. The deformation modulus of the saturated shale is …
Experimental Study Of The Effect Of Freeze-Thaw Cycles On Dynamic Characteristics Of Silty Sand, Jing Sun, Mao-Sheng Gong, Hong-Qiang Xiong, Lin-Rui Gan
Experimental Study Of The Effect Of Freeze-Thaw Cycles On Dynamic Characteristics Of Silty Sand, Jing Sun, Mao-Sheng Gong, Hong-Qiang Xiong, Lin-Rui Gan
Rock and Soil Mechanics
By using the GDS dynamic triaxial apparatus tests, the effect of freeze-thaw cycles on dynamic stress, dynamic modulus, dynamic modulus ratio and damping ratio of silty sand under different negative temperatures has been investigated in this study. It is found that under the same dynamic strain, the freeze-thaw cycles are negatively correlated with dynamic stress and dynamic modulus, but positively correlated with dynamic modulus ratio and damping ratio. With the increasing of freeze-thaw cyclic numbers, the dynamic stress and dynamic modulus decrease while the dynamic modulus ratio and damping ratio increase. The normalized fitting models for the dynamic modulus ratio …
Experimental Study On Cyclic Shear Stiffness And Damping Ratio Of Carbonate Sand-Steel Interface, Sheng-Jie Rui, Zhen Guo, Li-Zhong Wang, Wen-Jie Zhou, Yu-Jie Li
Experimental Study On Cyclic Shear Stiffness And Damping Ratio Of Carbonate Sand-Steel Interface, Sheng-Jie Rui, Zhen Guo, Li-Zhong Wang, Wen-Jie Zhou, Yu-Jie Li
Rock and Soil Mechanics
The dynamic response of carbonate sand-steel interface is of great significance to the safety and stability of the structure foundations which are constructed under reef geotechnical conditions. To investigate the effects of normal stress, cyclic amplitude and particle size on the interface shear stiffness and damping ratio, a series of cyclic shear tests on the interface between carbonate sand and steel was carried out based on the interface ring shear apparatus, and further compare these properties of carbonate sand with quartz sand. The results indicate that normal stress and cyclic amplitude have significant effects on the interface shear stiffness and …
Experimental Study On Dynamic Shear Modulus And Damping Ratio Of Coral Sand From Nansha Islands, Ke Liang, Yang He, Guo-Xing Chen
Experimental Study On Dynamic Shear Modulus And Damping Ratio Of Coral Sand From Nansha Islands, Ke Liang, Yang He, Guo-Xing Chen
Rock and Soil Mechanics
No abstract provided.