Study on Dynamic Characteristics of Rubber‐Red Clay Mixtures

Abstract

Rubber powder formed from discarded tire rubber is mixed with red clay to form a rubber-red clay mixture. The dynamic triaxial test was carried out on the mixtures under different conditions. The effects of rubber content, rubber particle size, moisture content of mixed soil, compactness, confining pressure, and vibration frequency on shear strain relation, dynamic shear modulus, and damping ratio of the mixture were investigated. The results show that under the same dynamic strain, the dynamic shear stress-strain curve of rubber mixed soil decreases with the increase in rubber particle content and moisture content and decrease in rubber particle size. On the other hand, it increases with the increase in compactness, confining pressure, and vibration frequency, and as the dynamic strain increases, the τd-γd curve becomes more nonlinear. In addition, with the increase in the rubber particle content, the dynamic shear modulus decreased while the damping ratio increased. When the content was 2%, the change was fastest. After continued addition, it gradually became stable, and when the decrease in rubber particle size also shows the same pattern, 2.00 mm rubber-red clay mixture shows better structure. The water content has great influence on dynamic shear modulus and damping ratio of rubber-red clay mixtures. With the increase in compactness, confining pressure, and vibration frequency, the interaction between mixed soil particles was enhanced, the dynamic shear modulus increased, and the damping ratio decreased.

Thermal coupling model of a traveling flexible printing electronical membrane subjected to nonlinear electrostatical force

“…Ying and Wu 7 presented nonlinear vibration of a moving flexible printed electron web under multiphysics dynamics and obtained the stable working range of the web. Chen et al 8 studied the dynamic problem of mixture. Based on the energy variation theory, Ying 9 established nonlinear differential equations of motion for a graphene electron membrane and obtained the stable and unstable working domain.…”

Experiments and Modeling of the Attenuation of the Dynamic Elastic Modulus of Saturated Red Clay under Cyclic Loading

“…Tang [12], Cai [13], Lei [14], and Liu [15] found that there was a critical cyclic stress ratio for the development of the dynamic elastic modulus of cohesive soils under cyclic loading. Mu [5,16], Yang [9], Zhang [17], Zhang [18], Liu [6,19], Chen [20], and others confirmed that red clay is the same. When the cyclic stress ratio is greater than the critical cyclic stress ratio, the cumulative deformation develops rapidly with the cyclic vibration times.…”