Graphene/Flexible Polylactic Acid Self-sensing Composite Structures 3D Printing and Performance

doi:10.3901/JME.2021.07.215

Abstract

Abstract: In order to further study piezoresistive properties of graphene composites, solve the problem of quantitative sensing through piezoresistive composites, and realize the deformation monitoring of self-sensing structure, oxide graphene/flexible poly lactic acid (rGO/flexPLA) composites are prepared by ball mill mixing process and single screw extrusion process, and material extrusion modeling 3D printing process is used as the structure forming process of rGO/flexPLA self-sensing composite material. Piezoresistive properties of the conductive polymer composites are studied. The influence of different load conditions on the piezoresistive properties of composite materials is explored, and it provided a reliable basis for realizing self-sensing structural deformation monitoring. Finally, a real-time monitoring system for morphing and reconstruction of self-sensing structures based on LabVIEW and real-time data acquisition module is built. By establishing the calculation model of the plane bending deformation sensing unit, the array sensing unit is used to realize the real-time monitoring function of structural deformation reconstruction, and the reconstructed shape error is less than 3%.

Key words: graphene composites, piezoresistive properties, 3D printing, self-sensing, deformation reconstruction

CLC Number:

TH16
TB33

TIAN Xiaoyong, YAN Wanquan, HUANG Lan, WANG Qingrui, LI Dichen. Graphene/Flexible Polylactic Acid Self-sensing Composite Structures 3D Printing and Performance[J]. Journal of Mechanical Engineering, 2021, 57(7): 215-223.

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