EAPSI: Analysis of Soil Deformation during Loading of a Plant Root-Inspired Foundation using X-ray Computed Tomography

EAPSI：使用 X 射线计算机断层扫描分析植物根启发基础加载过程中的土壤变形

• 批准号: 1614440
• 负责人: Seth Mallett
• 金额: $ 0.54万
• 依托单位: Mallett Seth D
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-06-15 至 2017-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1614440&HistoricalAwards=false
• 关键词: EAPSI; Analysis; Soil; Deformation; during

The overarching goal of the proposed research is to gain insight for the development of a bio-inspired plant root foundation. This will require the researcher to investigate how the roots of plants anchor the plant in the soil and how they resist external loads such as pullout from herbivores, compression from self-weight and rain or bending from high winds. Consequently, if a conventional building foundation can be enhanced to improve their efficiency in terms of volume of material used, the structure will not only cost less, but will require less concrete and steel, which has many environmental implications. This project will be conducted at the Port and Airport Research Institute in Yokosuka, Japan under the guidance of Dr. Satoshi Matsumura. In particular, the research seeks to analyze the soil displacement field when a root analog, fabricated using 3D printing, is loaded under tension or compression. The disturbed soil zone will be characterized by using a particle tracking image analysis scheme, where 3D images will be acquired at set increments during the loading process. Additionally, knowledge of the surface failure during tensile loading and the region contributing to the bearing capacity of the soil during root compression will serve to inform analytical models to predict the capacity of the root foundations under the two loading conditions. Furthermore, this project seeks to develop a fundamental understanding of the mechanical behavior of buried plant root-type systems at the particle level, which can then be easily expanded to field-scale applications.This award under the East Asia and Pacific Summer Institutes program supports summer research by a U.S. graduate student and is funded jointly by NSF and the Japan Society for the Promotion of Science.

拟议研究的总体目标是为生物启发的植物根基础的发展获得洞察力。这就要求研究人员研究植物的根是如何将植物锚在土壤中的，以及它们是如何抵抗外部负荷的，如食草动物的拔出，自重和雨水的压缩或大风的弯曲。因此，如果传统的建筑物基础可以加强，以提高其效率方面的材料使用量，结构不仅成本更低，但将需要更少的混凝土和钢材，这有许多环境影响。该项目将在日本横须贺港口和机场研究所进行，由Satoshi Matsumura博士指导。特别是，该研究旨在分析当使用3D打印制造的根模拟物在拉伸或压缩下加载时的土壤位移场。扰动土壤区将通过使用颗粒跟踪图像分析方案进行表征，其中在加载过程中将以设定的增量采集3D图像。此外，在拉伸加载过程中的表面故障和区域的知识，有助于在根压缩的土壤承载力将有助于通知分析模型，以预测在两个负载条件下的能力的根基础。此外，该项目旨在从粒子水平上对埋藏植物根系系统的力学行为进行基础性研究，并将其应用于野外。该项目是美国国家科学基金会（NSF）和日本科学振兴会（Japan Society for the Promotion of Science）共同资助的“东亚太平洋夏季研究所”（East Asia and Pacific Summer Institutes）项目下的一个项目，旨在资助美国研究生的夏季研究。