抄録
Fiber-reinforced polymer (FRP) composites have been rollover to different industries like aerospace, automobile, civil and others, because of its high specific strength and other advantages. However, these FRP composites are heterogeneous in nature, which implies constant monitoring. To address the constant monitoring, a low-cost structural material has been developed and characterized. For self-sensing, electrical resistance measurement technique has been adopted. To improve the electrical conductivity of FRPs, a suitable conductive resin consists of an intrinsically conducting polymer, polyaniline (PANI) doped with dodecylbenzene sulfonic acid (DBSA) and further distributed in divinyl-benzene (DVB) has been chosen. In this paper, a pure resin complex has been characterized for self-sensing strain sensor under flexural loading. Three different measurement configurations showed the different relation between elastic strain and the resistance change when specimens were strained within the elastic regime. The PANI composite showed the synchronicity, reversibility, and stability of the resistance, which led the material for in-situ strain sensing application in structural health monitoring (SHM). However, this resin can be implemented in different ways on FRPs, (like impregnated with dry fiber fabrics to fabricate high conductive composites, resin layer or coating on FRPs composites) for self-sensing structural strain sensor.
