Affiliation:
1. State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an 710049 P. R. China
2. Shaanxi Key Laboratory of Intelligent Robots Xi'an Jiaotong University Xi'an 710049 P. R. China
3. State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072 P. R. China
Abstract
AbstractThis study describes a novel stretchable and very sensitive strain gauge enabled by laser‐joining carbon nanotubes, resulting in unique architectures forming macroscopic web networks. The stiffness of the resistive strain sensor created by laser material patterning is reduced significantly, from 1.5824 to 0.142 kN m−1, corresponding to a change in laser power from 0 to 0.436 W. Many benefits of laser‐based bonding include precise and flexible local pattern production with minimal energy impact on the flexible substrate. Furthermore, the maximum Gauge factor of the sensor exhibits diverse trends with different strains, generating values of GF = 12.8 for strains less than 2.5% and GF = 165 for strains greater than 2.5% during extension‐retraction cycles. These disparities are the result of a dynamic fight between network degradation and regeneration.
Funder
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials