Collaborative Research: Computational Strategies for Resolving Schallamach Waves in Flexible Multibody Dynamics Simulations

该研究项目旨在满足对柔性多体动力学(FMD)的增强建模和仿真的需求，该FMD能够准确地捕捉摩擦诱导的行为，包括粘滑运动和Schallamach脱离波。这种系统级的摩擦激励振动会极大地降低效率和寿命，在柔顺材料与相对刚性的物体发生摩擦接触的情况下尤其明显，例如在软机器人、工程生物系统和其他新兴工程领域中。除了建模和模拟，这项研究还将应用增强的FMD配方--结合补充实验--研究影响和控制不良摩擦诱导行为的仿生表面图案。该项目产生的FMD模拟工具将减少美国重要行业对昂贵和耗时的设计原型的需求，包括汽车、制造设备和机器人。该项目包括通过K-12实习和研究人员实验室的培训机会增加未被充分代表的群体参与工程的外联活动。主要研究目标是探索灵活的多体动力学模拟工具的适用性和增强，用于分析沙拉马赫波和相关的粘滑接触动力学。解决这种摩擦行为将使用新的和有效的接触配方，以及有效的实施和解决程序。详细的实验将检验多体动力学预测，并为进一步改进提供方向。在研究的后期阶段，将进行计算和实验，以展示探索设计变化的新能力，例如各种微观和宏观尺度模式，这些模式可以规律化滑动并限制有害的粘滑和振动行为。研究工作的成功完成将极大地提高我们设计和定制包含软元件的多体系统的能力，同时显着将柔性多体动力学仿真的范围扩展到新的重要研究领域。

This research project addresses the need for enhanced modeling and simulation of flexible multibody dynamics (FMD) that can accurately capture friction-induced behavior, including stick-slip motion and Schallamach detachment waves. Such system-level frictionally excited vibrations can greatly degrade efficiency and lifetime, and may be especially significant where compliant materials are in frictional contact with relatively rigid bodies, as in soft robots, engineered biological systems, and other emerging engineering areas. In addition to modeling and simulation, this research will apply the enhanced FMD formulations -- together with complementary experiments -- to study biomimetic surface patterning for influencing and controlling undesired frictionally induced behavior. The FMD simulation tools arising from this project will reduce the need for expensive and time-consuming design prototypes in important US industries, including automotive, manufacturing equipment, and robotics. The project includes outreach activities to increase participation of underrepresented groups in engineering through K-12 internship and training opportunities in the investigators' labs.The primary research objective is to explore the applicability and enhancement of flexible multi-body dynamics simulation tools for analyzing Schallamach waves, and related stick-slip contact dynamics. Resolving such frictional behavior will be accomplished using new and efficient contact formulations, together with efficient implementations and solution procedures. Detailed experiments will test the multi-body dynamics predictions and suggest directions for further refinements. In later stages of the research, both computation and experiments will be exercised to demonstrate new capabilities for exploring design changes, such as various micro- and macro-scale patterns, that can regularize sliding and limit detrimental stick-slip and vibration behavior. Successful completion of the research effort will greatly increase our ability to design and tailor multi-body systems incorporating soft elements while significantly extending the reach of flexible multi-body dynamics simulation to new and important research areas.