Microscale sensor solution for data collection from fibre-matrix interfaces

Especially the applications of fibrous composites in miniature products, dental and other medical applications require accurate data of microscale mechanics. The characterization of adhesion between single filament and picoliter-scale polymer matrix usually relies on the experiments using so-called...

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Bibliographic Details
Published in:Scientific reports 2021-04, Vol.11 (1), p.8346-8346, Article 8346
Main Authors: Dsouza, Royson, Antunes, Paulo, Kakkonen, Markus, Tanhuanpää, Olli, Laurikainen, Pekka, Javanshour, Farzin, Kallio, Pasi, Kanerva, Mikko
Format: Article
Language:English
Subjects:
639/166/988
639/301/930
639/624/1020
Accuracy
Data collection
Dental restorative materials
Filaments
Fourier transforms
Humanities and Social Sciences
Interfaces
Lasers
Mathematical models
Medical research
multidisciplinary
Polymers
Science
Science (multidisciplinary)
Sensors
Strain gauges
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Summary:Especially the applications of fibrous composites in miniature products, dental and other medical applications require accurate data of microscale mechanics. The characterization of adhesion between single filament and picoliter-scale polymer matrix usually relies on the experiments using so-called microbond (MB) testing. The traditional MB test systems provide unitary data output (i.e., converted force) which is enigmatic in resolving the fracture parameters of multi-mode interface cracks. As a fundamental basis, the momentary reaction force and respective local strain at the location of a non-ambiguous gradient are needed for a mechanical analysis. In this paper, a monolithic compliant based structure with an integrated Fiber Bragg Grating (FBG) sensor is developed and analysed. The stiffness of the compliant structure is estimated by using mathematical and finite element (FE) models. Qualification experiments are carried out to confirm the functional performance: MB testing of synthetic (carbon and glass) and natural (flax) single filaments are successfully performed. Quasi-static and dynamic analysis of the MB testing is carried out by using the FE method to interpret the response of the compliant structure. The developed strain-sensing CBPM-FBG holder shows excellent sensitivity during the MB tests for both synthetic and natural filaments, even at a low filament diameters as low as 7 μ m , making the monolithic compliant structure the first instrument capable of force-strain data output for bonded filament-droplet specimens.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-87723-9