Analysis of a castable refractory using the wedge splitting test and cohesive zone model. Issue 13 (October 2019)

• 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 39:Issue 13(2019)
• Page Start: 3903
• Page End: 3914
• Publication Date: 2019-10
• Subjects: Cohesive zone model -- Digital image correlation -- Finite element model updating -- Wedge splitting test -- Castable refractory; 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.2019.03.009
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: A cohesive zone approach is applied to the wedge splitting test (WST) using the finite element code Abaqus to obtain the tensile strength, the fracture energy and insight about the crack wake region. A finite element model updating (FEMU) method, with a cost function based on the measured load (FEMU-F), is used to calibrate the sought parameters. Digital image correlation (DIC) provided the kinematic boundary conditions, and the images were also used to define the geometry for the finite element analysis. Besides the fracture energy analysis and the experimental load, gray level images and displacement fields are analyzed in order to validate the results. The cohesive region is active in the whole analyzed test as confirmed by estimates using the cohesive length.