Search results for " Least squares fitting"

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Experimental determination of mode I fracture parameters in orthotropic materials by means of Digital Image Correlation

2020

Abstract The mode I fracture parameters for an orthotropic body are directly calculated from full-field deformation measurements provided by Digital Image Correlation (DIC). Three complementary and direct approaches are evaluated and compared: (i) the determination of the Stress Intensity Factor (SIF) by fitting the displacement field using the analytical expression proposed by Lekhnitskii; (ii) the determination of the J-Integral by using the Energy Domain Integral (EDI) formulation on the raw DIC data; and (iii) the calculation of the J-Integral using the EDI approach on the displacement data fitted using Lekhnitskii’s formulation. A comparative experimental study is performed by testing …

Work (thermodynamics)Digital image correlationMaterials scienceLeast squares fitting/dk/atira/pure/subjectarea/asjc/2600/2604Digital image correlation Energy domain integral J-integral Least squares fitting Stress intensity factorOrthotropic materialDisplacement (vector)Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineMaterials Science(all)General Materials ScienceStress intensity factorStress intensity factorJ-integralDeformation (mechanics)Applied MathematicsMechanical Engineering/dk/atira/pure/subjectarea/asjc/3100/3104Mathematical analysisDigital image correlationCondensed Matter PhysicsEnergy domain integral/dk/atira/pure/subjectarea/asjc/2500Displacement fieldFracture (geology)/dk/atira/pure/subjectarea/asjc/2200/2210
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