Analysis of Factors Affecting the Direction of Plastic Strain Increment in Sand

Abstract:

Taking the standard sand of Fujian as the test material, this paper concentrates on studying the influence of different stress increment directions on the direction of plastic strain increment of sand materials under different stress states and the underlying mechanism. The test results show that the plastic strain increment angle rotates counterclockwise with the increase of stress increment direction angle, but the two angles do not coincide; the higher the stress state parameters is, the larger the stress increment direction angle range corresponding to sand dilatation is, the smaller the plastic strain increment direction angle range is, and the plastic volumetric strain still increases in critical state.The plastic flow mechanism of sand is explained from the average stress increment, generalized shear stress increment and stress state, which may provide theoretical reference and numerical support for the related research of plastic strain increment direction of sand.

• Periodical: Key Engineering Materials (Volume 828)
• Pages: 170-179
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.828.170
• Online since: December 2019
• Authors: Yun Peng Guo*, Cheng Zhi Qi, Chao Ma, Zhen Hui Lu, You Jie Sun
• Keywords: Plastic Strain Increment Direction, Stress Increment Direction, Stress State

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