Fabrication of Micro-Strain Gauge Using Electrohydrodynamic 3D Printing Technique

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Aerafi Firozabadi, Ali | 2020

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 53120 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Movahhedy, Mohammad Reza
Abstract:
A significant number of small-scale sensor sales have been reported in recent years. Strain gauges are one of the most common tools for measuring the length change of a part. Nowadays, 3D printing technology can be used in the fabrication of small-scale sensitive sensors, and metal nanoparticles printing are especially suitable for the production of flexible electronic sensors. Electro-hydrodynamic printer, with micro-scale printing capabilities, can be used as a new invention in fabrication of sensors. This type of printer uses the inkjet printing method and the basis of this type of printer is to apply an electric field to shrink the fluid jet. In the present study, pure ethanol was first tested and the effect of flow rate and electric field parameters on the printing process was investigated, and then using this method, a 200-um-wide strain gauge with a sensitivity coefficient of 102 was fabricated with silver nanoparticle contained ink. In addition, the effect of two parameters: the width, and the effective length affecting the sensitivity factor was examined, it was shown that the width of the sensor lines has the greatest impact on the sensitivity coefficient parameter
Keywords:
Strain Gages ; Sensors ; Strain Rate Sensitivity ; Electrohydrodynamic Printer ; Three Dimensional Printer

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