Ceramics and defects: Infrared thermography and numerical simulations - A wide-ranging view for quantitative analysis

Stefano Sfarra, Stefano Perilli, Domenica Paoletti, Dario Ambrosini

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The feasibility of square-pulsed thermography nondestructive testing for the detection of defects in one ceramic material sample has been carried out by finite element (FE) analysis. In particular, a ceramic plate containing defects of different diameters, depths, locations, nature, and shapes has been numerically investigated by means of Comsol® Multiphysics computer program, taking into account the results coming from both a MATLAB™ script and the infrared thermography (IRT) technique. Indeed, the FE method simulates through a 3D model the heat transfer process induced into the ceramic material by two halogen lamps that have been applied in order to provoke an optimum thermal stress. Moreover, further defects like cracks arose beneath the surface of the plate due to the shrinkage process, have been discovered, and contrasted using a non-usual segmentation algorithm that when correlated in the time to IRT data simulates the thermo-elastic effect. Following the non-direct procedure proposed, both the depth of each defect and its main dimensions have been retrieved into a satisfactory accuracy.

Original languageEnglish
Pages (from-to)43-62
Number of pages20
JournalJournal of Thermal Analysis and Calorimetry
Volume123
Issue number1
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes

    Fingerprint

Keywords

  • Defects
  • Inclusions
  • Infrared thermography
  • Modeling
  • Nondestructive testing
  • Segmentation algorithm
  • Silica
  • Thermal properties of the pottery

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this