6533b7d8fe1ef96bd126b88a

RESEARCH PRODUCT

RGB Photoelasticity: Review and Improvements

Michele ScafidiAugusto AjovalasitGiovanni Petrucci

subject

PhysicsIncandescent light bulbPhotoelasticitybusiness.industryMechanical EngineeringFunction (mathematics)law.inventionSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineOpticsMechanics of MaterialslawModulationbirefringent materials digital photoelasticity experimental mechanics non destructive testing RGB methodNondestructive testingCalibrationRGB color modelSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria IndustrialebusinessFluorescent lamp

description

:  This paper considers the main developments of RGB photoelasticity with reference to the maximum measurable retardation. In this paper, a new procedure based on the standard error function evaluated on a subset of the calibration array is also proposed and experimentally tested. The experiments show that the filament lamp makes it possible to find retardations until approximately 4 fringe orders while the fluorescent lamp makes it possible to determine higher fringe orders (12 fringe orders in this paper) owing to the discrete spectrum of the source. The paper shows that, by using the incandescent lamp, the primary limiting factor is the lack of modulation of the R, G and B signals whereas, by using the fluorescent lamp, the limitation of the maximum fringe order derives mainly from the gradient of the fringes and the procedure of search of the retardation.

yearjournalcountryeditionlanguage
2010-04-01Strain
https://doi.org/10.1111/j.1475-1305.2008.00571.x