Graphite is a brittle, polygranular material, which brings difficulties to the research of its fracture toughness. In the present paper, an experimental work on measuring the fracture toughness of graphite IG-11 is described. Three-point bending tests were employed. The effects of graphite specimen size, thickness, and the relative crack length a/W are studied in the tests. The deformation and strain near the crack tips are measured by both the strain gauge method and the digital speckle correlation method (DSCM). The results indicate that the fracture toughness of graphite IG-11 is in a range of 0.82∼1.27 MPa.m1/2, with an averaged value of 1.038 MPa.m1/2.
- Nuclear Engineering Division
- Power Division
An Experimental Study on Fracture Toughness of a Fine-Grained Isotropic Graphite
Wang, H, Sun, L, Wang, H, Shi, L, & Zhang, Z. "An Experimental Study on Fracture Toughness of a Fine-Grained Isotropic Graphite." Proceedings of the 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. Volume 2: Plant Systems, Structures, and Components; Safety and Security; Next Generation Systems; Heat Exchangers and Cooling Systems. Anaheim, California, USA. July 30–August 3, 2012. pp. 175-179. ASME. https://doi.org/10.1115/ICONE20-POWER2012-55008
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