Research in characterization of cyclic load parameters using fiber bragg gratings system

Fatigue is the primary cause of structural failure. Fatigue failures are caused by fatigue loadings in the form of cyclic loads. To avoid fatigue failures, structures need monitoring. This paper reports a study of optical fiber Bragg grating responses under variable amplitude fatigue load. Use of optical fiber in monitoring structural condition becomes extensive research nowadays due to its advantageous characteristics than conventional method such as using strain gauges. A standard specimen (ASTM E606) is used for initial study. The specimens were attached with fiber Bragg grating sensor and test configuration were set up. All the data and information were analyzed and comparisons with strain gauge sensor were performed. It was observed that response from FBG sensor is consistent with applied cyclic loads.