Monitoring of water absorption in CFRP laminates using embedded fiber Bragg grating sensors

Takeda, Shin‐ichi; Tsukada, Takuhei; Sugimoto, Sunao; Iwahori, Yutaka

doi:10.1016/j.compositesa.2014.02.018

Cited by 20 publications

(18 citation statements)

References 24 publications

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“…Recently, polyimide coated FBG sensors have been embedded in unidirectional and cross-ply CFRP laminates to evaluate the swelling strain due to water absorption [19]. A birefringence in the FBG reflection spectrum before water absorption was reported for cross-ply laminates demonstrating the multiaxial strain state due to residual 4/29 3/11/2015 stresses similar to Okabe et al [17].…”

Section: Introductionmentioning

confidence: 79%

An experimental–numerical investigation of hydrothermal response in adhesively bonded composite structures

Sarfaraz

Canal

Violakis

et al. 2015

Composites Part A: Applied Science and Manufacturing

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Section: Introductionmentioning

confidence: 79%

An experimental–numerical investigation of hydrothermal response in adhesively bonded composite structures

Sarfaraz

Canal

Violakis

et al. 2015

Composites Part A: Applied Science and Manufacturing

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“…), the survivability of the components is a key issue. For example, Takeda, S.-I [30] used FBGs to measure the swelling strain and coefficient of the moisture expansion of CFRP laminates to determine their suitability for practical use. In addition, FRP materials as protective layers of OFS are very sensitive to harsh environments.…”

Section: Discussion and Proposalsmentioning

confidence: 99%

Advances of FRP-based smart components and structures

Chan

Zhou

2014

Pacific Science Review

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Fibre-Reinforced Polymer (FRP) composites have been widely used in civil engineering for the past two decades. This paper presents an overview of the smart components and structures based on FRP. The basic principles of intelligent structures made of FRP and Optical fibre sensors are introduced. Some significant up-to-date smart elements used as reinforcing and health monitoring structures are also described in detail. Moreover, certain applications of smart FRP systems in civil engineering are briefly mentioned. Smart bars based on FRP are found to be very useful and could replace conventional steel. In addition, FRP-OF-OFBG is one of the most advanced techniques for local and global monitoring. However, interface strain for externally reinforcing systems requires specific characteristics to overcome debonding effects. Finally, analysis of the problems of existing applications based on carbon fibre composites are highlighted, followed by a description of some possibilities of new designs of smart FRPs.

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“…[1][2][3][4][5][6][7] Nevertheless, the major drawback that composites instrumentation finds is that sensors are not inherently fail-safe. Currently, the sensor's integration has been made with the aim of monitoring the phenomena caused by the in-service conditions.…”

Section: Introductionmentioning

confidence: 99%

“…[4,[9][10][11] One of the main issues to deal with in composite structures instrumentation is the location of the sensors. [4][5][6][7][8][9]11] Nonetheless, the designers still view the sensor as an implanted flaw which could be the initiation site for delamination growth, having a higher chance to cause deterioration of the properties of the parent material. However, these sensors are only sensitive to the physical phenomena on the external face of the structure.…”

Section: Introductionmentioning

confidence: 99%

“…On the one hand, the surface sensors have been employed widely because they do not have a significant influence on the mechanical properties of the structure. [12][13][14] To reduce the influence of the sensor inside the parent structure, several methods have been proposed over the past decades placing the devices directly between the composite plies during the layup, [4][5][6][7][8][9][10] ply cutout embedding, [12,13] and plies interlacing. [1][2][3] On the other hand, the embedded sensors have proven their value added to survey the inner physical phenomena.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mode I interlaminar fracture toughness of carbon‐epoxy coupons with embedded ceramic sensors

et al. 2017

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This study analyses the mechanical and crack growth behavior of woven carbon fiber reinforced plastics (CPRF) with embedded ceramic sensors. The material studied here is 3K-70-P carbon fiber plain weave with EPOLAM 2015® epoxy resin. The composite is manufactured with vacuum bagging procedure. Later on, the composite Mode I interlaminar fracture toughness (G IC ) is calculated by means of double cantilever beam tests (DCB) for two layout configurations [0/90] and [±45] with and without embedded sensors. Results give an initial approach of the fracture behavior of an instrumented composite facing an interlaminar crack. The interlaminar fracture toughness for the instrumented specimens is lower compared to the noninstrumented coupons. The presence of the sensor and its wire connection has a considerable impact on the damage tolerance of the woven composite, where the sensors surroundings seem to be the more likely region to be affected by an interlaminar fracture. K E Y W O R D S carbon fibers, delamination, fractography, fracture toughness F I G U R E 5 Load-displacement curve for [±45] double cantilever beam coupons [Colour figure can be viewed at wileyonlinelibrary.com] Reference With Peak load = 105 N, Peak load = 45 N, With How to cite this article: Torres M, Tellez RA, Hernández H, Camps T. Mode I interlaminar fracture toughness of carbon-epoxy coupons with embedded ceramic sensors.

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Monitoring of water absorption in CFRP laminates using embedded fiber Bragg grating sensors

Cited by 20 publications

References 24 publications

An experimental–numerical investigation of hydrothermal response in adhesively bonded composite structures

An experimental–numerical investigation of hydrothermal response in adhesively bonded composite structures

Advances of FRP-based smart components and structures

Mode I interlaminar fracture toughness of carbon‐epoxy coupons with embedded ceramic sensors

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