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Full-Text Articles in Engineering
Optical Fiber Sensors For Smart Composite Materials And Structures, Manjusha Ramakrishnan, Yuliya Semenova, Gerald Farrell, Ginu Rajan
Optical Fiber Sensors For Smart Composite Materials And Structures, Manjusha Ramakrishnan, Yuliya Semenova, Gerald Farrell, Ginu Rajan
Books/Book chapters
Composite material structures are widely used in the aerospace, marine, aviation, transport, sport/leisure and civil engineering industries. Such composite material structures are frequently subjected to external perturbations and varying environmental conditions, which may cause the structures to suffer from fatique damage and/or failure, and thus require real-time structural health monitoring (SHM). Of necessity, the diagnosis process and condition monitoring of composite structures are usually carried out during their working life. The goal of such diagnosis is to detect, identify, locate, and assess the defects that my affect the safety or performance of a structure.
A Photonic Crystal Fiber Based Polarimetric Sensor For Cure Monitoring Of Magneto-Rheological Smart Composite Material, Manjusha Ramakrishnan, Ginu Rajan, Yuliya Semenova, Y. Zhou, Stephen Jerrams, Gerald Farrell
A Photonic Crystal Fiber Based Polarimetric Sensor For Cure Monitoring Of Magneto-Rheological Smart Composite Material, Manjusha Ramakrishnan, Ginu Rajan, Yuliya Semenova, Y. Zhou, Stephen Jerrams, Gerald Farrell
Articles
A buffer stripped high birefringent photonic crystal fibre based polarimetric sensor is developed for monitoring the curing process of magnetorheological elastomer (MRE) smart composite material. Using the developed sensor, different phases of the MRE curing process are clearly visible from the phase shift variation of the embedded polarisation maintaining photonic crystal fibre (PM-PCF) sensor. During the curing process, the buffer stripped PM-PCF exhibits a stress/strain induced phase shift variation from 0 to 1.98 rad. This is a significantly large phase change, which can be used to very clearly identify the different stages in the curing process. For comparison, a fibre …
Experimental Study And Analysis Of A Polymer Fiber Bragg Grating Embedded In A Composite Material, Ginu Rajan, Manjusha Ramakrishnan, Yuliya Semenova, Eliathamby Ambikairajah, Gerald Farrell, Gang-Ding Peng
Experimental Study And Analysis Of A Polymer Fiber Bragg Grating Embedded In A Composite Material, Ginu Rajan, Manjusha Ramakrishnan, Yuliya Semenova, Eliathamby Ambikairajah, Gerald Farrell, Gang-Ding Peng
Articles
The characteristics of polymer fiber Bragg gratings (FBGs) embedded in composite materials are studied in this paper and are compared with characteristics of their silica counterparts. A polymer FBG of 10 mm length which exhibits a peak reflected wavelength circa 1530 nm is fabricated and characterized for this purpose. A silica FBG with a peak reflected wavelength circa 1553 nm is also embedded in the composite material for a comparison study. The fabricated composite material sample with embedded sensors is subjected to temperature and strain changes and the corresponding effects on the embedded polymer and silica FBGs are studied. The …
The Influence Of Thermal Expansion Of A Composite Material On Embedded Polarimetric Sensors, Manjusha Ramakrishnan, Ginu Rajan, Yuliya Semenova, Piotr Lesiak, Andrzej Domanski, Tomasz Wolinksi, Anna Boczkowska, Gerald Farrell
The Influence Of Thermal Expansion Of A Composite Material On Embedded Polarimetric Sensors, Manjusha Ramakrishnan, Ginu Rajan, Yuliya Semenova, Piotr Lesiak, Andrzej Domanski, Tomasz Wolinksi, Anna Boczkowska, Gerald Farrell
Articles
Abstract. Some of the most critical issues of the influence of the thermal expansion of composite materials on embedded polarimetric sensors for measurements of strain and temperature are studied in this paper. A composite material sample with polarimetric fiber sensors embedded in two distinct layers of a multi-layer composite structure is fabricated and characterized. The polarimetric fiber sensors used in this study are based on panda type fiber and polarization maintaining photonic crystal fiber (PM-PCF). The temperature sensitivities of polarimetric fiber sensors with acrylate buffer coated and buffer stripped polarization maintaining optical fibers are measured in free space and compared …