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Experimental and Theoretical Investigation on Dynamic Performance of Cemented Sand and Gravel Material

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In order to investigate dynamic characteristics of Cemented Sand and Gravel (CSG) material, cyclic loading tests have been carried out conducted on a large scale dynamic triaxial apparatus. The dynamic stress–strain relationship, the hysteresis phenomenon, the failure model, dynamic elastic modulus, damping ratio, and the relationship between the axial energy consumption per unit volume and the cycle numbers on these mechanical characteristics during the whole load-unload process had been studied. From the results of tests, with the increasing of the CPs and the cement content, the value of compressive strength and dynamic elastic modulus increase, but the damping ratio decrease. The shape of the hysteresis loop likes a crescent, the axial energy consumption per unit volume increases linearly at first and then increases nonlinearly. There were two dividing points in the evolution process of dynamic modulus and damping ratio, the relationship curves between dynamic modulus, damping ratio and strain were all divided three phases by the dividing points. It was confirmed that CSG material clearly showed elasto-plasticity and the damage was shear failure and had an angle of 48°∼53° under cyclic loading. In addition the mathematical models were established to describe the evolution process of the above parameters.
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Keywords: CEMENTED SAND AND GRAVEL MATERIAL; DAMPING RATIO; DYNAMIC MODULUS; DYNAMIC STRESS–STRAIN FULL CURVE; GRADED CYCLIC LOADING; HYSTERESIS LOOP

Document Type: Research Article

Publication date: July 1, 2018

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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