在可重新配置的颗粒状元材料中,适应力链的演变
Sven Witthaus1, Atoosa Parsa2, Dong Wang1
1Department of Mechanical Engineering, Yale University, 9 Hillhouse Ave., New Haven, CT 06511, USA. rebecca.kramer@yale.edu.
Soft matter
|July 15, 2025
概括
研究人员开发了可变模量 (VM) 粒子,可以动态改变其刚度. 这允许对颗粒状材料中的力链进行定向控制,为适应性颗粒状元材料铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 物理 物理学 物理
- 机器人技术 机器人技术 机器人技术
背景情况:
- 负载下的颗粒包装会形成由粒子特性影响的力链.
- 控制这些力量链是设计先进材料的关键.
研究的目的:
- 为了研究可变模量 (VM) 颗粒,以便在需要时控制力链.
- 为所需的机械反应优化粒子模量模式.
- 开发适应性的颗粒状超材料.
主要方法:
- 使用了具有外和低点合金核心的VM粒子.
- 采用朱尔加热来动态改变粒子模量 (软化/硬化).
- 结合进化算法与离散元素方法 (DEM) 模拟.
- 经过验证的模拟预测与实验准2DVM粒子组件.
- 使用光弹性技术测量力输出.
主要成果:
- 通过改变单个粒子模块,证明了指导力链的能力.
- 通过模拟预测的优化模块模式在实验中成功实现.
- 通过控制颗粒刚度,在组装边界上实现了特定的力输出.
结论:
- 虚拟机粒子为动态控制颗粒系统的机械性能提供了一种新的方法.
- 这项研究是创造可编程,可适应的颗粒状元材料的重要一步.
- 这些发现对机器人和材料科学有意义,使特定任务的材料适应成为可能.
更多相关视频
09:00Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
Published on: September 29, 2019
13.5K
09:39Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
Published on: June 28, 2024
1.1K
相关概念视频
Adaptability of Cytoskeletal Filaments
3.9K
The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments in the cytoskeleton determines their ability to perform various functions within the cell. It can undergo rapid reorganization during processes like cell division or remain stable for several hours as in the interphase. The adaptability of these filaments depends on stringent regulatory mechanisms. The microfilament and microtubules of the...
3.9K
Cell-matrix's Response to Mechanical Forces
2.8K
In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue.
Anchoring junctions mechanically attach a cell to the...
Anchoring junctions mechanically attach a cell to the...
2.8K
Design Example: Forces in Sluice Gate
1.4K
In hydraulic engineering, sluice gates are essential for managing water flow through channels, reservoirs, and irrigation systems. Sluice gates, acting as vertical barriers, regulate water by adjusting the gate's opening height, which changes the velocity and pressure of water flowing beneath the gate. Understanding the forces involved is crucial to designing sluice gates that can withstand dynamic pressure differences, especially when the gate is closed or partially open.
Key variables in...
Key variables in...
1.4K
Assembly of Cytoskeletal Filaments
21.4K
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
21.4K
