Four-point bending experiment and simulation of dog bone nuclear graphite

Chenguang GU; Guangli ZENG; Xiong YANG; Yang ZHONG; Dong DING

doi:10.11889/j.0253-3219.2017.hjs.40.050601

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Four-point bending experiment and simulation of dog bone nuclear graphite

NUCLEAR ENERGY SCIENCE AND ENGINEERING | 更新时间：2021-05-19

- Four-point bending experiment and simulation of dog bone nuclear graphite
- NUCLEAR TECHNIQUES Vol. 40, Issue 5, Article number: 050601(2017)
- 作者机构：
  
  1.中国科学院上海应用物理研究所嘉定园区上海 201800
  2.中国科学院大学北京 100049
- 作者简介：
- 基金信息：
  
  Supported by Ministry of Harman Resources and Social Security of People's Republic of China
- DOI：10.11889/j.0253-3219.2017.hjs.40.050601
  CLC： TL99
- Received：10 January 2017，
  
  Revised：14 February 2017，
  
  Published：10 May 2017
- 稿件说明：
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Chenguang GU, Guangli ZENG, Xiong YANG, et al. Four-point bending experiment and simulation of dog bone nuclear graphite[J]. Nuclear techniques, 2017, 40(5): 050601
DOI：

Chenguang GU, Guangli ZENG, Xiong YANG, et al. Four-point bending experiment and simulation of dog bone nuclear graphite[J]. Nuclear techniques, 2017, 40(5): 050601 DOI： 10.11889/j.0253-3219.2017.hjs.40.050601.

摘要

核石墨是熔盐堆的关键材料之一，断裂性能是核石墨的重要属性之一。首先通过四点弯曲实验测量了犬骨型核石墨的断裂载荷，观察裂纹扩展路径再运用扩展有限单元法（Extended finite element method，XFEM）对这一实验过程进行了模拟。模拟得到的裂纹扩展路径和断裂实验结果有很好的一致性，证明利用XFEM可以准确地模拟核石墨的断裂过程。同时确定了适用于核石墨的断裂准则。

Abstract

Background

Nuclear graphite is a key material in Molten Salt Reactor (MSR). And fracture property is one of the most important parameters of the nuclear graphite. Purpose:This study aims at the failure stress of the graphite and to develop a numerical model to simulate the experiment.

Methods

The four-point bending test was employed to find the failure stress of the dog bone graphite. And a numerical model has been developed for simulation by using the extended finite element method (XFEM).

Results

The failure stress of NG-CT-10 dog bone nuclear graphite has been investigated through the four-point bending test

and the experiment results are in accord with the numerical simulation results.

Conclusion

The numerical model in XFEM can accurately simulate the fracture process of the nuclear graphite

and the fracture criterion can be determined accordingly for nuclear graphite.

关键词

Keywords

references

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