https://doi.org/10.1061/9780784482803.017
https://doi.org/10.1061/9780784482803.017
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https://doi.org/10.1061/9780784482803.017
DOI：
10.1061/9780784482803.017
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Martinez, Alejandro
中科院分区：
文献类型：
--
作者：
Ahmed, Sharif A;Martinez, Alejandro
本文介绍了3D打印技术的前景，以生成人工土壤模拟的粗粒土的力学行为建模的目标。天然角和圆形沙粒的3D X射线CT扫描已用于使用polyjet 3D打印技术生成角和圆形颗粒模拟物。扫描的天然沙粒和3D打印颗粒的比较证明了3D打印技术能够再现沙粒的形状和尺寸。对角形和圆形天然颗粒和3D打印颗粒进行的固结仪压缩测试的结果用于证明组成材料（即石英与聚合物）刚度对测量的土壤压缩性的影响，并使用赫兹接触理论研究响应的归一化。本文提供的结果还包括天然土壤和3D打印土壤的小应变模量-平均有效应力关系的比较。本文阐述了3D打印类似物在模拟粗粒土力学行为方面的潜在用途，并确定了在临界状态土壤力学框架内实施拟议规范化方案的未来研究需求。
This paper presents the prospect of 3D printing technology to generate artificial soil analogs with the goal of modeling the mechanical behavior of coarse-grained soils. 3D X-ray CT scans of natural angular and rounded sand particles have been used to generate angular and rounded particle analogs using the polyjet 3D printing technology. A comparison of the scanned natural sand particles and the 3D printed particles demonstrates the ability of 3D printing technology to reproduce the shape and size of the sand particles. The results of oedometer compression tests on the angular and rounded natural and 3D printed particles are used to demonstrate the effect of constituent material (i.e. quartz versus polymer) stiffness on the measured soil compressibility and investigate the normalization of the response using the Hertz contact theory. The results provided in this paper also include comparison of the small-strain moduli–mean effective stress relationship obtained for the natural and 3D printed soils. This paper illustrates the potential use of 3D printed analogs to model the mechanical behavior of coarse-grained soils and identifies future research needs for implementation of the proposed normalization scheme within the critical state soil mechanics framework.