1503 Damage Monitoring of CFRP Structures Based on Impact Force Identification

Impact damage monitoring of FRP pressure vessels based on impact force identification

“…A technique similar to that reported in [11] was developed by Jang et al [12] using fiber Bragg grating sensors, and its effectiveness was verified experimentally with composite flat and stiffened panels. Hu et al [13] and Fukunaga et al [14] proposed a convenient method which monitors the damage of CFRP structures by identifying the location and force history of the applied impact from measured strain data using transfer matrices that relate the impact force to the corresponding sensor responses. In their study, drop-weight impact tests of CFRP laminated plates were conducted, and the change in force history due to the impact-induced damage was focused.…”

“…Thus, it was concluded that, if the induced damage is not severe, the initiation of damage can be easily judged by examining the identified force history. In a subsequent paper, [15] the peak value of the identified force was used to quantitatively assess the extent of the damage. The results from the previous studies signify that impact damage monitoring based on impact force identification is an effective approach, but further investigations must be conducted to improve it.…”

“…The impact force is identified by employing the identification method based on experimental transfer matrices. [14,15] In order to demonstrate the validity of the present method, drop-weight impact tests are conducted and the damages induced during the tests are monitored. …”