Fracture mechanisms of refractories at room and elevated temperatures analyzed with wedge splitting tests and image correlation

• Grant number: 18/23081-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2019
• End date: February 29, 2024
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Rodrigo Bresciani Canto
• Grantee: Rafael Vargas Maginador
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated scholarship(s): 21/09238-6 - Identification of the 3D fracture process zone for refractory materials by digital volume correlation combined with finite element analyses, BE.EP.DR

Abstract

Castable refractories are essential for many base industries. Their formulation and characterization become crucial for minimizing energy loss and thereby process costs. Increasing the predictability of the failure is mandatory to reduce the risks in these high temperature applications. Few high-temperature mechanical tests were analyzed with full-field measurement techniques, although these materials are vastly studied. This approach would allow for the evaluation of the fracture mechanisms directly for in-service temperature ranges. With complex microstructures, even at room temperature, crack propagation is not always known through the depth of the specimen. This thesis aims to fill in this gap by proposing the analysis of high-temperature Wedge Splitting Tests (WSTs) with Digital Image Correlation (DIC), and room-temperature WSTs performed within a tomograph with Digital Volume Correlation (DVC). With these full-field results, it becomes possible to validate simulations ofcrack propagation with Finite Element (FE) codes.A furnace will be built with coupled cameras and mechanisms to allow for taking pictures for high-temperature (up to 1200°C) WSTs. The material will be selected to be technologically relevant and to present a good contrast to X-ray radiations. The geometry will also be optimized to improve theresolution of the acquired volumes. It is expected to perform one of the first full-field measurements in high-temperature WSTs, and also at room-temperature when monitored within a tomograph. Both approaches are complementary tobetter understand the fracture mechanisms in this stable crack propagation test, not only within the bulk of the specimen but also in environments closer to the final applications. (AU)

Scientific publications

(13)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VARGAS, R.; CANTO, R. B.; SMANIOTTO, B.; HILD, F.. Calibration of cohesive parameters for a castable refractory using 4D tomographic data and realistic crack path from in-situ wedge splitting test. Journal of the European Ceramic Society, v. 43, n. 2, p. 16-pg., 2023-02-01. (18/23081-0, 21/09238-6, 20/08077-6)

SONEGO, M.; SCIUTI, V. F.; VARGAS, R.; CANTO, R. B.; PESSAN, L. A.. Composite design bioinspired by the mesocarp of Brazil nut (Bertholletia excelsa). BIOINSPIRATION & BIOMIMETICS, v. 17, n. 4, p. 14-pg., 2022-07-01. (18/23081-0, 18/02801-4, 15/25523-1)

JAILIN, CLEMENT; BOUTERF, AMINE; VARGAS, RAFAEL; HILD, FRANCOIS; ROUX, STEPHANE. Sub-minute In Situ Fracture Test in a Laboratory CT Scanner. INTEGRATING MATERIALS AND MANUFACTURING INNOVATION, v. 8, n. 3, p. 413-422, SEP 2019. (18/23081-0)

VARGAS, R.; PINELLI, X.; SMANIOTTO, B.; HILD, F.; CANTO, R. B.. On the effect of sintering temperature on the fracture energy of an Alumina-Mullite-Zirconia castable at 600?C. Journal of the European Ceramic Society, v. 41, n. 7, p. 4406-4418, JUL 2021. (18/15266-0, 18/23081-0, 18/02801-4)

FABRIS, DEBORA CRISTINA NIERO; MIGUEL, ENZO HENRIQUE; VARGAS, RAFAEL; CANTO, RODRIGO BRESCIANI; VILLAS-BOAS, MARIANA DE OLIVEIRA CARLOS; PEITL, OSCAR; SGLAVO, VINCENZO M.; ZANOTTO, EDGAR DUTRA. Microstructure, residual stresses, and mechanical performance of surface crystallized translucent glass-ceramics. Journal of the European Ceramic Society, v. 42, n. 11, p. 12-pg., 2022-05-18. (13/07793-6, 19/12417-0, 18/23081-0, 20/08077-6)

VARGAS, R.; TSITOVA, A.; BERNACHY-BARBE, F.; BARY, B.; CANTO, R. B.; HILD, F.. On the identification of cohesive zone model for curved crack in mortar. STRAIN, v. 56, n. 6, p. 22-pg., 2020-07-06. (18/23081-0, 18/15266-0)

VARGAS, R.; TSITOVA, A.; BERNACHY-BARBE, F.; BARY, B.; CANTO, R. B.; HILD, F.. On the identification of cohesive zone model for curved crack in mortar. STRAIN, v. 56, n. 6, SI, JUL 2020. (18/15266-0, 18/23081-0)

VARGAS, R.; CANTO, R. B.; HILD, F.. On the calibration of cohesive parameters for refractories from notch opening displacements in wedge splitting tests. Journal of the European Ceramic Society, v. 41, n. 14, p. 7348-7361, NOV 2021. (18/15266-0, 18/23081-0, 10/20920-9)

SCIUTI, V. F.; VARGAS, R.; CANTO, R. B.; HILD, F.. Pyramidal adaptive meshing for Digital Image Correlation dealing with cracks. ENGINEERING FRACTURE MECHANICS, v. 256, OCT 15 2021. (10/20920-9, 18/15266-0, 18/23081-0, 18/02801-4)

VARGAS, R.; CANTO, R. B.; HILD, F.; ROUX, S.. On accounting for speckle extinction via DIC and PCA. OPTICS AND LASERS IN ENGINEERING, v. 149, FEB 2022. (18/15266-0, 18/23081-0)

VARGAS, R.; CANTO, R. B.; HILD, F.. Cohesive properties of refractory castable at 600 degrees C: Effect of sintering and testing temperature. Journal of the European Ceramic Society, v. 42, n. 14, p. 17-pg., 2022-08-13. (18/15266-0, 20/08077-6, 18/23081-0, 21/09238-6)

SCIUTI, VINICIUS FIOCCO; VARGAS, RAFAEL; GUERRERO, NESTOR; MARANTE, MARIA EUGENIA; HILD, FRANCOIS. Digital image correlation analyses of masonry infilled frame: Uncertainty-based mesh refinement and damage quantification. MATHEMATICS AND MECHANICS OF SOLIDS, v. N/A, p. 23-pg., 2023-07-24. (18/23081-0, 21/09238-6)

SCIUTI, VINICIUS FIOCCO; VARGAS, RAFAEL; CANTO, RODRIGO BRESCIANI; HILD, FRANCOIS. Modal characterization of crack network development in an MgO containing refractory castable. JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN, v. N/A, p. 11-pg., 2023-01-12. (18/23081-0, 18/02801-4, 18/15266-0)