Usage of FBG fiber optic sensors to monitor the structural behaviour of a geopolymer concrete structural member

Geopolymer concrete, a relatively new building material has been suggested as an alternative to Ordinary Portland Cement (OPC) based concretes for within the building sector, due to it having a relatively low CO2 emission during production. An issue with geopolymer concrete however, is that high amounts of early age creep, shrinkage and decrease...

A method for determining the position of FBG sensors accurately

Fibre Bragg grating sensors have gained a lot of attention in damage detection and strain measurement applications in the past few decades. These applications include matrix crack detection and delamination tip monitoring in composite structures, crack detection in concrete and civil engineering structures and etc. The damage localisation...

Calculation of the Mean Strain of Smooth Non-uniform Strain Fields Using Conventional FBG Sensors

In the past few decades, fibre Bragg grating (FBG) sensors have gained a lot of attention in the field of distributed point strain measurement. One of the most interesting properties of these sensors is the presumed linear relationship between the strain and the peak wavelength shift of the FBG reflected spectra. However, subjecting sensors to a...

Development of permanent composite overwrap repairs for steel pipelines, incorporating Structural Health Monitoring

A good structural health monitoring system on a composite repair can improve the understanding of the life of such a repair. Currently, overwrap repairs are considered to be temporary in nature due to the unknown life expectancy. Using finite element modelling, a model was created of a pipe with a repaired defect and a composite overwrap. This...