Measurement of Residual Stress Based on a Ring FBG Array

Residual stress measurement of non-uniform materials based on distributed optical fiber ring array

“…Zhang J et. al proposes a residual stress testing method applying a fiber optic FBG ring array [17], which uses one 8-base element FBG array to greatly simplify the process of arranging the sensor array and realize the testing of non-uniform residual stress. However, the installation, multiplexing, and signal demodulation of an increasing number of sensors can be challenging, and spatial resolution is limited.…”