Fiber-Optic-Based Pressure and Residual Strain Monitoring in CFRP Bonding Process: Toward Realization of Secondary Bonding in CFRP Aircraft Structures - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Conference Papers Year : 2014

Fiber-Optic-Based Pressure and Residual Strain Monitoring in CFRP Bonding Process: Toward Realization of Secondary Bonding in CFRP Aircraft Structures

Abstract

Applying secondary bonding to places where carbon fiber reinforced plastic (CFRP) structures are conventionally bolted leads to significant cost and weight saving. However, it has yet to be utilized due to difficulties in quality control. Lack of local pressure in bonding process has detrimental influence on the quality of the cured adhesive layer. Pressure detection is hence a key for controlling bonding quality, and a new quality assurance technique is urgently needed. This study established a fiber-optic-based pressure detection and quality assurance technique for secondary bonding process. Fiber Bragg grating (FBG) optical sensors were embedded in the adhesive layer and the reflected spectrum changes were monitored during the pressurizing stage to detect the applied pressure. Thermal residual strain after curing was also evaluated for further quality assurance. Good correlation was observed between the cure pressure, the CFRP quality and the FBG sensor response, confirming the validity of the proposed technique.
Fichier principal
Vignette du fichier
0386.pdf (501.28 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-01020465 , version 1 (08-07-2014)

Identifiers

  • HAL Id : hal-01020465 , version 1

Cite

Shu Minakuchi, Keigo Uhira, Yutaka Terada, Nobuo Takeda, Nozomi Saito, et al.. Fiber-Optic-Based Pressure and Residual Strain Monitoring in CFRP Bonding Process: Toward Realization of Secondary Bonding in CFRP Aircraft Structures. EWSHM - 7th European Workshop on Structural Health Monitoring, IFFSTTAR, Inria, Université de Nantes, Jul 2014, Nantes, France. ⟨hal-01020465⟩
168 View
259 Download

Share

Gmail Facebook X LinkedIn More