| 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) | |
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