6533b85dfe1ef96bd12be774
RESEARCH PRODUCT
Experimental determination of mode I fracture parameters in orthotropic materials by means of Digital Image Correlation
José XavierGiuseppe PitarresiGiuseppe CatalanottiRiccardo Cappellosubject
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/2200/2210description
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 an IM7/8552 cross-ply laminate, and the effect of different parameters is analysed and discussed. The outcomes of this work show that, if an accurate choice of the parameters is performed, the different approaches lead to the same results.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-08-01 |