Collaborative Research: Elasto-Granular Interactions Between Morphing Skins and Soils

合作研究:变形皮肤和土壤之间的弹力颗粒相互作用

基本信息

  • 批准号:
    2228271
  • 负责人:
  • 金额:
    $ 28.65万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2023
  • 资助国家:
    美国
  • 起止时间:
    2023-10-01 至 2026-09-30
  • 项目状态:
    未结题

项目摘要

This award will support research at the intersection of geotechnical engineering and structural mechanics, with an eye toward the realization of flexible burrowing probes for applications including site investigation and underground excavation. Flexible probes and robots typically comprise a linear actuator and a compliant skin – a shell-like structure that is carefully patterned to achieve desired and usually extreme morphing behaviors. As the actuator elongates or shortens, the skin interacts with the surrounding soil, endowing the probe with the capacity of moving through the burrow following bioinspired forms. To overcome limitations imposed by current skin designs, this research introduces the idea of multi-modal skins, that can radially expand while generating pop-up features that induce the anisotropic friction necessary for motion within the burrow. To avoid extensive trial and error in the skin design, this project aims at providing an understanding of the “elasto-granular” interactions between elementary features of such morphing skins (e.g., the pop-up plates that yield anisotropic friction) and granular media. This understanding is leveraged to realize a burrowing probe that will be subjected to extensive tests to evaluate the burrowing performance of the skin and its capacity to interact with the surrounding soil in meaningful ways. The ideas within this project will promote the utilization of flexible geotechnical systems, that leverage structural flexibility to achieve innovative functionalities. Moreover, the knowledge on elasto-granular interactions created in this project can be exported to other fields, such as agriculture and biomedical engineering. Our outreach and educational activities, revolving around the theme of “flexible civil engineering systems”, will give students opportunities to see civil engineering systems under a new light and to understand that flexible structures, like those found in nature, are extremely useful in a variety of civil engineering applications.The primary objective of this research is to provide an understanding of the microscopic and macroscopic interactions between “architected” shape-morphing shells and granular media and to leverage this knowledge to guide the realization of probes for underground burrowing and exploration. To reach this objective, our work aims at exploring the interface between the nonlinear mechanics of flexible structures and the mechanics of granular media and soils. This research will use a holistic approach based on: i) theoretical studies on the skins’ morphing capacity using structural mechanics and kinematic theories; ii) stress predictions using the finite element method; iii) studies on microscopic elasto-granular interactions via discrete element modeling and X-ray CT scan-assisted direct shear experiments; and v) macroscopic validation of skin behavior via visualization tank experiments and discrete-element simulations on the burrowing of a probe equipped with such skin. This project will lay the foundation for the rational application of architected shells as morphing skins for burrowing probes.This project is jointly funded by the Engineering for Civil, Mechanical and Manufacturing Innovation (CMMI) Division and the Established Program to Stimulate Competitive Research (EPSCoR).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.
该奖项将支持岩土工程和结构力学交叉领域的研究,着眼于实现现场调查和地下挖掘等应用的灵活挖掘探头。柔性探针和机器人通常包括线性致动器和顺应性皮肤-一种精心图案化的壳状结构,以实现所需的且通常是极端的变形行为。当致动器伸长或缩短时,皮肤与周围的土壤相互作用,赋予探针按照生物启发形式移动通过洞穴的能力。为了克服当前皮肤设计的限制,本研究引入了多模态皮肤的想法,该皮肤可以径向扩展,同时生成弹出功能,从而引起洞穴内运动所需的各向异性摩擦。为了避免皮肤设计中的大量试验和错误,该项目旨在提供对这种变形皮肤的基本特征之间的“弹性颗粒”相互作用的理解(例如,产生各向异性摩擦的弹出板)和粒状介质。利用这种理解来实现一种挖掘探针,该探针将进行广泛的测试,以评估皮肤的挖掘性能及其以有意义的方式与周围土壤相互作用的能力。该项目中的想法将促进灵活的岩土系统的利用,利用结构的灵活性,以实现创新的功能。此外,在这个项目中创建的弹性颗粒相互作用的知识可以出口到其他领域,如农业和生物医学工程。我们的推广和教育活动,围绕“灵活的土木工程系统”的主题,将给学生机会看到土木工程系统下的一个新的光,并了解灵活的结构,像那些在自然界中发现,在各种土木工程应用中非常有用。本研究的主要目标是提供对“建筑”形状变形的外壳和粒状介质,并利用这些知识来指导实现地下挖掘和勘探的探头。为了达到这一目标,我们的工作旨在探索柔性结构的非线性力学和粒状介质和土壤的力学之间的接口。这项研究将采用一种整体方法,其基础是:i)利用结构力学和运动学理论对蒙皮变形能力进行理论研究; ii)利用有限元方法进行应力预测; iii)通过离散元建模和X射线CT扫描辅助直接剪切实验研究微观弹性-颗粒相互作用;以及v)通过可视化槽实验和对装备有这种皮肤的探针的挖掘的离散元件模拟来宏观验证皮肤行为。本项目将为合理应用建筑壳体作为探穴器的变形蒙皮奠定基础。本项目由土木工程、机械和制造创新(CMMI)部门和既定计划,以刺激竞争力的研究(EPSCoR)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进行评估,更广泛的影响审查标准。

项目成果

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Ali Khosravi其他文献

A synbiotic improves performance and gut health in broiler chickens
一种合生元可提高肉鸡的性能和肠道健康。
  • DOI:
    10.1038/s41598-025-04459-6
  • 发表时间:
    2025-05-31
  • 期刊:
  • 影响因子:
    3.900
  • 作者:
    Ali Khosravi;Fatollah Boldaji;Behrouz Dastar;Mohammad Amir Karimi Torshizi;Morteza Alemi;Seyed Hossein Hoseinifar
  • 通讯作者:
    Seyed Hossein Hoseinifar
Evaluation of hedging strategies for electricity procurement risks of a power-to-methanol plant with stochastic modeling: A case study of Denmark
利用随机建模对电制甲醇厂电力采购风险的套期保值策略评估:丹麦案例研究
  • DOI:
    10.1016/j.ijhydene.2025.05.271
  • 发表时间:
    2025-06-18
  • 期刊:
  • 影响因子:
    8.300
  • 作者:
    Nafiseh Mirzakhani;Ali Khosravi;Bernd Möller
  • 通讯作者:
    Bernd Möller
Food quality assessment and quantification using multispectral images from screen and smartphone for kiwifruit ripeness and rice discrimination
使用来自屏幕和智能手机的多光谱图像对猕猴桃成熟度和大米进行食品质量评估及量化鉴别
  • DOI:
    10.1016/j.jfca.2025.107630
  • 发表时间:
    2025-08-01
  • 期刊:
  • 影响因子:
    4.600
  • 作者:
    Ali Khosravi;Mohsen Kompany-Zareh;Mahdiyeh Ghaffari
  • 通讯作者:
    Mahdiyeh Ghaffari
The role of power – to – hydrogen in carbon neutral energy and industrial systems: Case Finland
  • DOI:
    10.1016/j.energy.2023.128624
  • 发表时间:
    2023-12-01
  • 期刊:
  • 影响因子:
  • 作者:
    Tero Koivunen;Ali Khosravi;Sanna Syri
  • 通讯作者:
    Sanna Syri
Flexibility and profitability in power-to-methanol plants: Integrating storage solutions and reserve market participation
电转甲醇工厂的灵活性和盈利性:整合储能解决方案与参与备用市场
  • DOI:
    10.1016/j.energy.2025.136438
  • 发表时间:
    2025-07-01
  • 期刊:
  • 影响因子:
    9.400
  • 作者:
    Melika Taslimi;Ali Khosravi
  • 通讯作者:
    Ali Khosravi

Ali Khosravi的其他文献

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