Strain Measurement in Two-Dimension Stresses Based on Polymer-Matrix Carbon Fiber Smart Stripes

Abstract

The paper aims to sense strains of structures in two-dimension stress states and to perform a large-region strain monitoring. Polymer-matrix Carbon Fiber Smart Stripes (CFSS) distributed in two ways are stuck on a bending plate to detect strains using the piezoresistivity of CFSS. Monotonous tests are conducted to calibrate the surface piezoresistivity of the CFSS and then cyclic tests are conducted to measure the strains of the structure using the constitutive relation of CFSS. Results show the experimental values by CFSS fairly good with those by gage factors.

Design of improved differential decoupling method of temperature sensitivity and piezoresistivity for CFRPs

“…data in this paper. The piezoresistive coefficients of carbon composites are taken as [1][2][3][4][5][6][7][8][9][10] ,…”

“…Strain sensing is one of the potential applications of Carbon fiber reinforced plastic (CFRP) due to its piezoresistivities (change in resistance due to deformation) [1][2][3][4][5][6][7] . Compared with conventional strain sensors, CFRP sensors show some advantages in gauge factor, durability and detection scale.…”