CAREER: Soil Penetration through Bioinspired Stress State Manipulation

职业：通过仿生应力状态操纵进行土壤渗透

• 批准号: 1942369
• 负责人: Alejandro Martinez
• 金额: $ 50万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-03-01 至 2025-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1942369&HistoricalAwards=false
• 关键词: CAREER; Soil; Penetration; through; Bioinspired

This Faculty Early Career Development (CAREER) grant will advance understanding and evaluate the application of several adaptive and energy-efficient soil penetration processes to inspire a new paradigm for design and construction of civil infrastructure. Current and future environmental and economic challenges, including the continued growing population and the depletion of natural resources, create a strong demand for sustainable and adaptive infrastructure. Many aspects of our infrastructure rely on soil penetration processes, from the characterization of soils at project sites to construction. This project will improve our understanding of the soil burrowing and penetration strategies used by several insects, mollusks, and fishes to develop innovative solutions for applications in foundation and anchorage systems, tunneling, soil characterization, and monitoring of sites and structures. The integrated educational, diversity, and outreach goals are to raise awareness and broaden the overall understanding of bioinspiration as a philosophy for development of sustainable engineering solutions and to help develop a workforce that is inclusive of Hispanic and Latinx students for the field of bioinspired geotechnics.The principal research goals of this project are to identify and quantify the mechanisms that enable efficient soil penetration in biological systems and to effectively upscale these mechanisms to physical scales relevant to civil infrastructure. Biological adaptations involved in wasp, honeybee, mosquito, and sand lance substrate penetration, earth and marine worm locomotion, caecilian and clam burrowing, and root growth will be explored. This project will integrate bioinspired design, laboratory experiments, discrete element modeling simulations, and centrifuge models. The fundamental mechanical processes that facilitate bioinspired soil penetration will be investigated, including soil arching, principal stress rotation, interactions between zones with altered stress states, load transfer and its dependency on shape, and softening caused by pore fluid pressurization. The education and outreach efforts will be targeted towards middle school and high school students through youth citizen science activities and towards undergraduate and graduate students through training in the classroom and the laboratory. This educational and outreach plan will aim to increase participation of Hispanic and Latinx students in the bioinspired geotechnics field.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该教师早期职业发展（职业）资助将促进对几种适应性和节能土壤渗透过程的应用的理解和评估，以激发土木基础设施设计和施工的新范例。当前和未来的环境和经济挑战，包括人口持续增长和自然资源枯竭，对可持续和适应性基础设施产生了强烈需求。我们基础设施的许多方面都依赖于土壤渗透过程，从项目现场土壤的特性到施工。该项目将提高我们对多种昆虫、软体动物和鱼类所使用的土壤挖洞和渗透策略的理解，以开发适用于基础和锚固系统、隧道、土壤特征以及场地和结构监测的创新解决方案。综合教育、多样性和推广目标是提高对生物启发作为开发可持续工程解决方案的理念的认识和整体理解，并帮助培养一支包括西班牙裔和拉丁裔学生的生物启发岩土工程领域的劳动力队伍。该项目的主要研究目标是确定和量化生物系统中土壤有效渗透的机制，并有效升级 这些机制与民用基础设施相关的物理规模。将探索涉及黄蜂、蜜蜂、蚊子和沙矛基质穿透、地球和海洋蠕虫运动、蚓螈和蛤穴挖洞以及根生长的生物适应。该项目将整合仿生设计、实验室实验、离散元建模模拟和离心机模型。将研究促进仿生土壤渗透的基本机械过程，包括土壤拱形、主应力旋转、应力状态改变的区域之间的相互作用、载荷传递及其对形状的依赖性，以及孔隙流体加压引起的软化。教育和推广工作将通过青年公民科学活动针对中学生和高中生，并通过课堂和实验室培训针对本科生和研究生。该教育和推广计划旨在增加西班牙裔和拉丁裔学生在仿生岩土工程领域的参与。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

A numerical study on the multi-cycle self-burrowing of a dual-anchor probe in shallow coarse-grained soils of varying density

双锚探针在浅层不同密度粗粒土中多周期自掘进数值研究

• DOI: 10.1007/s11440-023-02088-9
• 发表时间: 2023
• 期刊: Acta Geotechnica
• 影响因子: 5.7
• 作者: Chen, Yuyan;Zhang, Ningning;Fuentes, Raul;Martinez, Alejandro
• 通讯作者: Martinez, Alejandro

DEM simulations of a bio-inspired site characterization probe with two anchors

具有两个锚点的仿生位点表征探针的 DEM 模拟

• DOI: 10.1007/s11440-022-01684-5
• 发表时间: 2022
• 期刊: Acta Geotechnica
• 影响因子: 5.7
• 作者: Chen, Yuyan;Martinez, Alejandro;DeJong, Jason
• 通讯作者: DeJong, Jason

Numerical and Physical Modeling of the Effect of the Cone Apex Angle on the Penetration Resistance in Coarse-Grained Soils

• DOI: 10.1061/(asce)gm.1943-5622.0002626
• 发表时间: 2023-02
• 期刊: International Journal of Geomechanics
• 影响因子: 3.7
• 作者: O. M. Hunt;K. O'Hara;Y. Chen;A. Martinez

DEM investigation of the performance of a bio-inspired self- burrowing probe in granular soils of varying gravity

仿生自穴式探针在不同重力颗粒土壤中性能的 DEM 研究

• 发表时间: 2023
• 期刊: 10th European Conference on Numerical Methods in Geotechnical Engineering
• 作者: B. Wang, N. Zhang

DEM Simulation of a Bio-Inspired Self-Burrowing Probe in Granular Materials

粒状材料中仿生自穴式探针的 DEM 模拟

• 发表时间: 2024
• 期刊: GeoCongress 2023
• 作者: Ningning Zhang, Ph.D.