Modelling and fabrication of flexible strain sensor using the 3D printing technology

IF 3.6 4区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
Seyhmus Gunes, Osman Ulkir, Melih Kuncan
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引用次数: 0

Abstract

The use of additive manufacturing (AM) or 3D printing in sensor technology is increasing daily because it can fabricate complex structures quickly and accurately. This study presents the modeling, fabrication, and characterization processes for the development of a resistance type flexible strain sensor. The finite element model of the sensor was developed using COMSOL software and was verified experimentally. The experimental results agreed well with the simulation results. The fabrication process was performed using the molding technique. The flexible substrate of the strain sensor was fabricated by fused deposition modeling (FDM), an AM method, with dimensions of 20 mm × 60 mm and a thickness of 2 mm. In this process, a flexible and durable elastomer material called thermoplastic polyurethane (TPU) was used. The liquid conductive silver was then injected into the mold channels. The characterization process was performed by establishing experimental and numerical setups. Studies were conducted to maximize sensitivity by changing the geometric properties of the sensor. At the 30% strain level, sensitivity increased by 9% when the sensor thickness decreased from 2 to 1.2 mm. As a result of the gradually applied force, the strain sensor showed a maximum displacement of 34.95 mm. Tensile tests were also conducted to examine the effects of stress accumulation on the flexible base. The results of this study show that the strain sensor exhibits high linearity-sensitivity and low hysteresis performance.
利用 3D 打印技术建模和制造柔性应变传感器
快速成型制造(AM)或 3D 打印技术可以快速、准确地制造复杂结构,因此在传感器技术中的应用与日俱增。本研究介绍了电阻式柔性应变传感器的建模、制造和表征过程。传感器的有限元模型是使用 COMSOL 软件开发的,并经过了实验验证。实验结果与模拟结果完全吻合。制造过程采用模塑技术。应变传感器的柔性基板是通过熔融沉积建模(FDM)(一种 AM 方法)制造的,尺寸为 20 mm × 60 mm,厚度为 2 mm。在此过程中,使用了一种名为热塑性聚氨酯(TPU)的柔性耐用弹性体材料。然后将液态导电银注入模具通道。表征过程是通过建立实验和数值设置来完成的。研究通过改变传感器的几何特性来最大限度地提高灵敏度。在 30% 应变水平下,当传感器厚度从 2 毫米减小到 1.2 毫米时,灵敏度提高了 9%。由于施加的力逐渐增大,应变传感器显示出 34.95 毫米的最大位移。此外,还进行了拉伸试验,以检验应力累积对柔性底座的影响。研究结果表明,应变传感器具有高线性灵敏度和低滞后性能。
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来源期刊
Journal of Thermoplastic Composite Materials
Journal of Thermoplastic Composite Materials 工程技术-材料科学:复合
CiteScore
8.00
自引率
18.20%
发文量
104
审稿时长
5.9 months
期刊介绍: The Journal of Thermoplastic Composite Materials is a fully peer-reviewed international journal that publishes original research and review articles on polymers, nanocomposites, and particulate-, discontinuous-, and continuous-fiber-reinforced materials in the areas of processing, materials science, mechanics, durability, design, non destructive evaluation and manufacturing science. This journal is a member of the Committee on Publication Ethics (COPE).
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