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Distributed internal strain measurement during composite manufacturing using optical fibre sensors

Daniel Martínez Sánchez; Matthieu Gresil; Constantinos Soutis

Composites Science and Technology. 2015;.

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Abstract

After manufacturing a composite laminate, it is expected to store residual stresses that might affect the mechanical response of the plate. An optical fibre sensor was embedded in an epoxy carbon fibre panel, measuring the development of residual strain by monitoring in-situ and in real-time the manufacturing process, from the resin infusion to the curing cycle, and the changes experienced within. An optical sensor interrogator detects and measures changes in strain and temperature along the optical fibre length with high precision and accuracy, making it possible to obtain a full strain/temperature profile. Data acquired from the embedded sensor led to track and characterize the strain profile at every stage of the manufacturing process. This work showed that the infusion stage is highly related to the residual strain after the curing process. Moreover, the residual strain is 40% higher near the edge compared to the mean value measured in the laminate.

Bibliographic metadata

Type of resource:
Content type:
Publication status:
Accepted
Publication type:
Publication form:
Published date:
Accepted date:
2015-09-23
Submitted date:
2015-07-20
ISSN:
Publisher:
Digital Object Identifier:
doi:10.1016/j.compscitech.2015.09.023
Attached files embargo period:
Immediate release
Attached files release date:
18th October, 2015
Access state:
Active

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
uk-ac-man-scw:275799
Created by:
Gresil, Matthieu
Created:
18th October, 2015, 13:16:16
Last modified by:
Gresil, Matthieu
Last modified:
18th October, 2015, 13:16:16

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