Comparison of two full-field identification methods for the wedge splitting test on a refractory. Issue 16 (December 2018)

• Record Type: Journal Article
• Authors: Vargas, R.; Neggers, J.; Canto, R.B.; Rodrigues, J.A.; Hild, F.
• Is Part Of: Journal of the European Ceramic Society. Volume 38:Issue 16(2018)
• Page Start: 5569
• Page End: 5579
• Publication Date: 2018-12
• Subjects: Crack tip position -- Digital image correlation -- Finite element model updating -- Stress intensity factors -- Virtual test -- Crack propagation; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2018.07.039
• Languages: English
• ISSNs: 0955-2219

Abstract

Highlights: Fracture mechanics parameters are assessed for a wedge splitting test. Finite Element Model Updating (FEMU) and Integrated DIC (IDIC) are compared. A virtual experiment is analyzed, then followed by experimental analyses. The R-curve behavior of the studied material is obtained for both approaches. The R-curve is compared with independent estimates of fracture energies. Gray level residuals are a powerful tool to check analyses with experimental data. IDIC led to lower residuals and fracture energies were more consistent than FEMU. Abstract: Two full-field identification methods are applied to the Wedge Splitting Test (WST) to obtain crack tip positions, stress intensity factors (SIFs) and T -stress. The first method is based on Finite Element Model Updating (FEMU), and the second is integrated digital image correlation (IDIC). Both are applied to a simplified virtual experiment and then to a cyclic WST. The gray level residuals are used to assess which results are more trustworthy. Fracture energy analyses are performed to validate the estimated R-curves.