Nuclear graphite is a type of quasi-brittle material, in which the ratio of the tensile strength to the compressive strength is higher than that of ceramic and hard rock materials. In this case, it is difficult to achieve a perfect splitting mode when the Brazilian splitting test is used to measure the tensile strength of such materials, leading to significant measurement errors. In this study, a ring compression test for measuring the tensile strength of the nuclear graphite material was proposed, and related principles and experimental verification were presented. The results showed that a regular tensile failure mode can be achieved using ring compression tests, and the tensile strength of nuclear graphite can be accurately measured. Furthermore, it was found that the accuracy obtained from ring compression tests was much higher than that from Brazilian splitting tests.

核石墨是一种准脆性材料，其抗拉强度与抗压强度之比高于陶瓷和硬岩材料。在这种情况下，当使用巴西劈裂测试来测量这种材料的抗张强度时，很难实现完美的劈裂模式，从而导致明显的测量误差。在这项研究中，提出了一种用于测量核石墨材料抗张强度的环压试验，并提出了相关原理和实验验证。结果表明，使用环压缩试验可以达到规则的拉伸破坏模式，并且可以精确地测量核石墨的拉伸强度。此外，