Discrete Element Analysis of the Strength Anisotropy of Fiber-Reinforced Sands Subjected to Direct Shear Load

Applied Sciences

Lei Nie¹  Yan Xu¹  Linxian Gong¹ 

[1] Construction Engineering College, Jilin University, Xin Min Zhu Street, Changchun, Jilin 130026, China;

关键词: fiber-reinforced sands;    direct shear test;    discrete element method;    strength anisotropy;    micromechanical behavior;    mechanical response;   

DOI  :  10.3390/app10113693

来源: DOAJ

【 摘 要 】

Soil reinforcement with natural or synthetic fibers enhances its mechanical behavior in various applications. Fiber-reinforced sands (FRS) can be relatively anisotropic because of the fiber self-weight and the compaction technique. However, the microscopic mechanisms underlying the anisotropy are still poorly understood. This study used a discrete element approach to analyze the microscopic mechanisms underlying the strength anisotropy of FRS due to fiber orientation. Analysis of contact networks revealed that the optimum fiber orientation angle is perpendicular to the main direction of strong contact force in direct shear testing. These fibers produced the largest increase in shear zone thickness, normal force around the fiber body, effective contact area, tensile force along fibers, and energy storage/dissipation. This study is valuable for further understanding of the mechanical behaviors of FRS.

【 授权许可】

Unknown