Publications de Dimitrios Karalekas

On the mechanical characteristics of a self-setting calcium phosphate cement

John Botsis, Luis Pablo Canal Casado, Dimitrios Karalekas, Alexios Bimis

Objective: To perform a mechanical characterization of a self-setting calcium phosphate cement in function of the immersion time in Ringer solution. Materials and methods: Specimens of self-setting calcium phosphate cement were prepared from pure alpha-TCP ...

Elsevier2017

On the Effects of the Lateral Strains on the Fiber Bragg Grating Response

John Botsis, Marco Lai, Dimitrios Karalekas

In this paper, a combined experimental-numerical based work was undertaken to investigate the Bragg wavelength shift response of an embedded FBG sensor when subjected to different conditions of multi-axial loading (deformation). The following cases are exa ...

Mdpi Ag2013

Monitoring of hygrothermal ageing effects in an epoxy resin using FBG sensor: A methodological study

John Botsis, Joël Cugnoni, Dimitrios Karalekas

This study demonstrates the feasibility of using fibre Bragg grating (FBG) sensors to monitor the effects of hygrothermal ageing on the axial strains in a cylindrical epoxy specimen with a centrally located optical glass fibre. A 24 mm long FBG, inscribed ...

Elsevier2009

Monitoring of process induced strains in a single fibre composite using FBG sensor: A methodological study

John Botsis, Joël Cugnoni, Dimitrios Karalekas

A partially embedded long fibre-Bragg grating (FBG) into an epoxy cylindrical specimen is used to monitor the strain distribution evolution along its axis when subjected to subsequent cycles of thermal ageing at 70 and 110 degrees C. Assuming a total volum ...

2008