Open AccessComparison of stress separation procedures. experiments versus theoretical formulation
Author(s) -
Javier Rodríguez
Publication year - 2022
Publication title -
engineering solid mechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 17
eISSN - 2291-8752
pISSN - 2291-8744
DOI - 10.5267/j.esm.2022.1.003
Subject(s) - materials science , isotropy , finite element method , digital image correlation , stress (linguistics) , elasticity (physics) , mechanics , plane stress , structural engineering , optics , composite material , physics , engineering , linguistics , philosophy
The article deals with stress separation using different experimental techniques and their comparison to numerical and theoretical solutions. The method is applied to a keyhole sample coupon, to which measurements of fringe order, temperature or displacement were made using photo-elasticity, TSA (Thermo-elastic Stress Analysis) and DIC (Digital Image Correlation). The results are compared to FEM simulations (Finite Element Method) using the stress concentration factor (Kt) as a benchmark. Additionally, an Airy stress function is proposed and tested against obtained measurements. The comparison of Kt shows agreement among measurements as well as numerical and theoretical results. It is concluded that the presented method can be used for isotropic materials subjected to the plane stress, where stress variation through-thickness is negligible.