ON THE IMPROVEMENT OF STRAIN MEASUREMENTS WITH FBG SENSORS EMBEDDED IN UNIDIRECTIONAL COMPOSITES

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

G. Pereira (Autor) Outra; C. Frias (Autor) Outra; H. Faria (Autor) Outra; O. Frazão (Autor) Outra; A. T. Marques (Autor) FEUP

Revista

Título: Polymer Testing

Vol. 32 Nº 1, February 2013

Páginas: 99-105

ISSN: 0142-9418

Editora: Elsevier

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia electrónica ; Ciências Tecnológicas > Engenharia > Engenharia mecânica

Outras Informações

Abstract (EN): Optical fibre Bragg grating (FBG) sensors are now quite established and widely used in strain measurements of composites. However, insufficient understanding of the limitations of the embedment and measuring techniques often lead to inaccurate and inconclusive results. In this study a novel method to improve the reliability and accuracy of the strain measurements on unidirectional composites using embedded FBG sensors was successfully developed. Using a carbon/epoxy prepreg system, test specimens were manufactured with longitudinally embedded FBG sensors. The combined behaviour of the sensors and the host material was characterized and a calibration rule (correction factor) was determined for the chosen material. The consistency of the results with both theoretical and empirical assumptions suggests that the proposed method is applicable to a wide range of FBG sensors and host materials.

Idioma: Inglês

Tipo (Avaliação Docente): Científica