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首页> 外文会议>International Conference on Advanced Ceramics and Composites >OPTIMIZATION OF FRACTURE STRENGTH TESTS FOR THE SIGLAYER OF COATED FUEL PARTICLES BY FINITE ELEMENT ANALYSIS
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OPTIMIZATION OF FRACTURE STRENGTH TESTS FOR THE SIGLAYER OF COATED FUEL PARTICLES BY FINITE ELEMENT ANALYSIS

机译：用有限元分析优化涂覆燃料颗粒Siglayer的断裂强度试验

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Extended finite element (FE) analysis has been performed to optimize the fracture strength tests for SiC coating layer of tri-isotropic (TRISO) fuel particles. Since the SiC layer is a thin spherical shell that sustains most of the internal pressure from fission gas release and other internal expansions, obtaining accurate mechanical property data has been required for design optimization and performance assessment of the fuel. A crush testing technique for hemispherical shell SiC specimens has been newly developed, in which a metallic foil is inserted between the SiC specimen and the loading plunger to produce adequate stress distribution in the specimen. The present FE analysis aimed at finding proper material and thickness for the metallic insert, and detailed parametric studies were performed for insert material and thickness. The results could suggest optimum loading configurations that can provide sufficient uniformly stressed area, on which the reliability of fracture strength data is dependent. Fracture tests were conducted for model specimens, following the suggested details of loading configuration. The results demonstrated that the suggested loading configuration produced reliable fracture strength data for the SiC coating layer of TRISO fuel particles.
机译：已经进行了延长的有限元（Fe）分析以优化三位同学（Triso）燃料颗粒的SiC涂层的断裂强度试验。由于SiC层是薄的球形壳，其维持来自裂变气体释放和其他内部膨胀的大部分内部压力，因此获得精确的机械性能数据来设计优化和燃料的性能评估。新开发了一种用于半球形壳SiC标本的挤压测试技术，其中将金属箔插入SiC标本和装载柱塞之间，以在样品中产生足够的应力分布。目前的Fe分析旨在找到金属插入物的适当材料和厚度，以及用于插入材料和厚度的详细参数研究。结果可以提示可以提供足够的均匀压力区域的最佳装载配置，其中裂缝强度数据的可靠性是依赖性的。按照装载配置的建议细节，对模型标本进行裂缝试验。结果表明，建议的装载配置为三汽油颗粒的SiC涂层产生了可靠的断裂强度数据。

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