R-curves determination of ordinary refractory ceramics assisted by digital image correlation method |
| |
| Affiliation: | 1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan 430081, China;3. Chair of Ceramics, Montanuniversität Leoben, Peter-Tunner Strasse 5, 8700 Leoben, Austria;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China;2. National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan, China;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Department of Materials Science and Engineering and Institute of Materials Science, University of Connecticut, Storrs CT06269, USA;3. Hangzhou Yongte Information Technology Co., Ltd, Hangzhou 310000, Zhejiang, China;1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2. Transportation Institute, Inner Mongolia University, Hohhot 010070, China;3. College of Civil Engineering and Architecture, Hainan University, Haikou 570228, China;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan 430081, China;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China;2. Department of Ceramic Materials Engineering, University of Bayreuth, 95447, Bayreuth, Germany;3. National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China |
| |
| Abstract: | As a figure-of-merit, the rising ratio of crack propagation resistance to fracture initiation resistance indicates a reduction of the brittleness and enhances the thermal shock resistance of ordinary refractory ceramics. The significant nonlinear fracture behaviour is related to the development of a fracture process zone (FPZ). The universal dimensionless load–displacement diagram method is applied as a promising graphical method for the determination of R-curves for magnesia refractories showing different brittleness. By applying digital image correlation (DIC) together with the graphical method, the problems arisen with accurate determination of the fracture initiation resistance and the crack length are overcome. Meanwhile, the R-curve is subdivided with respect to the fracture processes, viz the fracture initiation, the development of FPZ and the onset of traction free macro-crack. With the simultaneous crack lengths evaluated from DIC, the contribution of each fracture process to the crack propagation resistance at certain loading stage is quantitatively presented. |
| |
| Keywords: | Universal dimensionless load–displacement diagram method Magnesia refractories Fracture process Digital image correlation |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
