CUED Publications database

Fibre optic instrumentation and calibration in the geotechnical centrifuge

Elshafie, MZE and da Silva, TS and Sun, T (2016) Fibre optic instrumentation and calibration in the geotechnical centrifuge. In: 3rd European Conference on Physical Modelling in Geotechnics, 2016-6-1 to 2016-6-3, Nantes, France.

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Abstract

Small-scale instrumentation suitable for use in the centrifuge can be a challenge, specifically when conventional instrumentation has limitations that preclude their use. In this research, a model geosynthetic material was used to span a void in a centrifuge model, and the strain in the geosynthetic was required to be measured. The conventional use of strain gauges would result in local stiffening over the void, obscuring the true strain that would be experienced in the material otherwise. The advance of fibre optic instrumentation allows this alternative, specifically the Fibre Bragg Grating (FBG)-based technique which is considered in this application due to its small size. This research gives discussion on the use of fibre optic instrumentation in the centrifuge, the calibration process required to ensure reliable readings, as well as the potential for future and broader use of fibre optics in the centrifuge.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div D > Construction Engineering
Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:57
Last Modified: 15 Aug 2017 01:27
DOI: