基于混合微观结构的软网络材料,具有在较大的变形上具有机械性质的独立可调性
Jianxing Liu1, Linwei Huang1, Haoyu Guo1
1State Key Lab for Strength and Vibration of Mechanical Structures, Soft Machines Lab, Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an 710049, China.
ACS applied materials & interfaces
|June 12, 2024
概括
研究人员开发了新的基于混合微观结构的软网络材料 (HMSNMs),用于先进的可伸缩电子产品. 这些材料提供可调节的J形应力应变反应和稳定的负波桑波桑反应.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 软机器人软机器人 软机器人软机器人
背景情况:
- 辅助性超材料显示出可伸缩电子产品的前景,但往往缺乏机械灵活性和在大型变形下稳定的波桑比率.
- 现有的辅助剂难以独立调整J形应力应变反应和负波桑比率,限制它们在各种承载场景中的应用.
研究的目的:
- 为可伸缩电子产品引入一种基于混合微结构的软网络材料 (HMSNMs) 的新型类型.
- 在软网络材料中实现J形应力应变响应和非线性波松比的独立调性.
- 提高机械性能,包括强度和波松比稳定性,用于苛刻的电子应用.
主要方法:
- 设计和制造使用不同类型的微结构沿着负载和横向方向的HMSNMs.
- 在各种变形水平下,对机械性能进行系统的研究,包括应力-应变行为和Poisson比率.
- 探索几何参数控制用于调整机械响应.
- 将HMSNMs集成到串行/并行配置中,以实现诸如形状编程和应力调节等高级功能.
主要成果:
- HMSNM 具有独立调节的 J 形应力-应变曲线和非线性波桑比率.
- 与现有的元材料相比,实现了显著更高的强度,在大型菌株上几乎稳定的负波桑比率.
- 通过对几何参数进行调整,对机械性能进行精确控制.
- 成功集成HMSNM,创建一个可拉伸的LED显示器,能够在单轴拉伸下显示动态图像而没有扭曲.
结论:
- HMSNMs代表了可伸缩电子产品软网络材料的突破,克服了当前辅助设计的局限性.
- 机械性能的独立调节性和增强的性能为设计复杂的软电子设备开辟了新的途径.
- 展示的功能,如形状编程和应力调节,突显了HMSNMs在下一代可穿戴和灵活电子产品中的潜力.
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