Proposal of the Prediction Method Using a Competing Risk Model on the Bending Strength of 2D-C/C Composites

Abstract

Bending strength of a 2D-C/C composite was studied by experimental and theoretical approaches, and the prediction method on the basis of stress-related fracture mode was proposed. In the experiment, three-point bending test and observation of fracture surface were carried out to clarify the stress-related fracture modes. From the fracture surface observation, three kinds of fracture modes were identified: the compressive, tensile and the shear fracture modes. In the theoretical approach, the Weibull strength theory and the proposed method were applied to estimate the bending strength prediction. As a result of this study, it was found that the proposed method is applicable to the bending strength prediction of the 2-C/C composite, whereas the Weibull strength theory is not applicable.

Investigation of Microstructural Change by X-ray Tomography and Anisotropic Effect on Thermal Property of Thermally Oxidized 2D-C/C Composite for Very High Temperature Reactor

“…The basic characteristics of the C/C composite were determined, and the strength prediction method was investigated. [7][8][9][10][11][12] Twodimensional C/C composite (2D-C/C composite, CX-270G made by TOYO TANSO Co., LTD.) is one of the candidate materials, from the viewpoints of high strength at high temperature and low fabrication cost, for ceramic control rod elements of the VHTR.…”