Granular dynamic shear strength and its influencing factors

Abstract

The granular dynamic shear strength is the same as that of the static one in nature, as found from numerous experiments and investigations. The shear strength is equal to the sum of the internal frictional force and the cohesive force. The influences of type, shape, size distribution, pore ratio, moisture content and variation of vibration velocity on the dynamic shear strength of granules were studied. Based on numerous vibration shear experiments, the authors investigate the mechanism of dynamic shear strength in granules in terms of the fundamental principle and the relevant theory of modern tribology.

Keywords

dynamic shear strength / granules / influencing factor / mechanism

References

[1] WuAi-xiangStudy on the characteristic of granular ores and the theory of dynamics in vibrating field[D], 1991, Changsha, Central South University of Technology

[2] ShiZhao-ji, WangLan-minDynamic character, prediction of liquefaction and evaluation of hazardness in soils (in Chinese) [M], 1999, Beijing, Earthquake Press

[3] WuAi-xiang, GuDe-sheng. The shear mechanical model of bulk solid under vibration[J]. Journal of Central-South Institute of Mining and Metallurgy, 1992, 23(2): 136-141(in Chinese)

[4] WuAi-xiang, GuDe-sheng. Study on the dynamic characteristic of broken ores in vibrating field[J]. Journal of Central-south Institute of Mining and Metallurgy, 1991, 22(3): 242-248(in Chinese)

[5] WuAi-xiang, GuDe-sheng, DaiXing-guo. Influence of water content on the flow ability of bulk solid[J]. Journal of Central-south Institute of Mining and Metallurgy, 1994, 25(4): 455-459(in Chinese)

[6] DaiXing-guo, WuXian-zhen. Probing into mechanism of granular loose and impaction by vibration[J]. Mining and Metallurgical Engineering, 2000, 20(1): 12-14(in Chinese)

[7] WuAi-xiang. Probe into the experiment and mechanism of granular vibrating liquefaction and close-grained action[J]. Journal of Central South Institute of Mining and Metallurgy, 1991, 23(suppl.): 15-20(in Chinese)

[8] WuAi-xiang, GuDe-sheng. The characteristics of inner and boundary friction of bulk solid under vibration[J]. Journal of Central-south Institute of Mining and Metallurgy (English Edition), 1993, 24(4): 459-163

[9] GutierrezM, IshiharaK, TowhataI. Model for the deformation of sands during rotation of principal stress direction[J]. Soils & Foundations, 1993, 33(3): 105-117

[10] IaiS, MatsunagaY, KameokaT. Strain space plasticity model for cyclic mobility[J]. Soils & Foundations, 1992, 32(2): 1-15

[11] NakataY, HyodoM, MurataH, et al.. Flow deformation of sands subjected to principal stress rotation [J]. Soils & Foundations, 1998, 38(2): 115-128