Damage sensing and mechanical characteristics of CFRP strengthened steel plate

Distributed strain measurement and possible breakage detection of optical-fiber-embedded composite structure using slope-assisted Brillouin optical correlation-domain reflectometry

“…Owing to their high strength, high elastic modulus, small weight, and high corrosion resistance, CFRPs have been widely used as materials to repair or strengthen steel structures. 24) In this experiment, as a specimen, a CFRP-strengthened steel plate was prepared using the vacuum-assisted resin transfer molding (VaRTM) technique, [25][26][27] which is known as an advanced, highly reliable, and reproducible method for the fabrication of composite materials. The VaRTM process is schematically shown in Fig.…”

“…1. 26) The process was performed by infusing liquid resin into laminated fibers or woven fabrics using a pressure differential between the atmosphere and vacuum; thereafter, the resin was hardened by heat (see Ref. 25 for more details).…”