摘要
为评价柔性应变传感器应用于人体皮肤不同工况下的延展性,制备了一种马蹄形金属导线-PDMS基底复合结构的柔性电子复合薄膜,选择邵氏硬度为10的双组分加成型硅胶作为仿真皮肤材料进行离体实验。首先,利用数字图像相关(DIC)方法获得样品贴附在不同厚度仿真皮肤上拉伸变形过程中的位移场与Von Mises应变场;其次,提出应变均值M与断裂伸长率e作为评价指标定量表征样品的延展性,分析仿真皮肤厚度与环境温度对延展性的影响。结果表明,皮肤厚度与环境温度变化对柔性电子复合薄膜延展性均有显著影响,当皮肤厚度为2 mm,环境温度为40℃时,样品延展性最佳,断裂伸长率达到145%。该研究定量分析了柔性电子薄膜在不同应用工况下的延展性,为柔性应变传感器的强度设计提供参考。
In order to evaluate the stretchability of flexible strain sensors on human skin under different conditions,a flexible electronic composite film embedding a horseshoe-shaped metal wire in a PDMS substrate was fabricated.A two-component silicone rubber with the Shore hardness of 10 was served as the simulated skin for ex vivo experiments.The displacement and Von Mises strain fields during the sample deformation on the simulated skin of different thicknesses were captured using the Digital Image Correlation(DIC)method.The evaluation indexes,mean value M and elongation at break e were proposed.The impact of the skin thickness and ambient temperature on the stretchability was analyzed.The results demonstrate that both factors significantly influence the stretchability of the composite film.Notably,a 2 mm skin thickness and 40℃result in the optimal stretchability,with the elongation rates of up to 145%.These findings provide valuable insights into the design of the flexible strain sensors,specifically in terms of the strength requirements.
作者
张泽
陈诚
李子赟
王涛
任春华
ZHANG Ze;CHEN Cheng;LI Ziyun;WANG Tao;REN Chunhua(School of Mechanical Engineering,Tianjin University of Commerce,Tianjin300134,China)
出处
《电子元件与材料》
CAS
北大核心
2024年第4期424-430,共7页
Electronic Components And Materials
基金
国家自然科学基金(12102302)。
关键词
柔性电子复合薄膜
数字图像相关
仿真皮肤
延展性
断裂伸长率
flexible electronic composite film
digital image correlation
simulated skin
stretchability
elongation at break
