A fracture study of slanted cracks using the stress dead‐zone hypothesis. Issue 12 (19th July 2020)

• Record Type: Journal Article
• Authors: Farahani, Behzad V.; de Melo, Francisco Q.; Tavares, Paulo; Moreira, Pedro
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 43:Issue 12(2020)
• Page Start: 3012
• Page End: 3026
• Publication Date: 2020-07-19
• Subjects: DIC -- FEM -- finite plates -- SIF -- slant cracks -- stress dead zone; Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.13305
• Languages: English
• ISSNs: 8756-758X

Abstract

Abstract: This manuscript investigates the effect of existing slant cracks in finite plates subjected to the mode I loading condition using the stress dead‐zone (SDZ) concept. For this purpose, standardised polymeric middle tension (MT) specimens containing slant notches with different orientations were mechanically tested under a unidirectional tensile load. The experimental data were collected and analysed using 3D digital image correlation (DIC) contributing to document the deformation field around slanted cracks and stress intensity factor (SIF) evaluation. Computationally, the fracture model was solved using the finite element method (FEM) to obtain results on the SIF, deformation field and the SDZ characterisations. The obtained SIFs were compared with a reference solution from the literature. An acceptable agreement has been accomplished amongst the results. Furthermore, the SDZ was assessed through deformation field obtained from DIC and FEM.