Transient Thermal Finite Element Analysis of CFC-Cu ITER Monoblock Using X-ray Tomography Data
Transient Thermal Finite Element Analysis of CFC-Cu ITER Monoblock Using X-ray Tomography Data
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DOI：
10.1016/j.fusengdes.2015.04.048
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发表时间：
2015-11
影响因子：
1.7
通讯作者：
L. Evans;L. Margetts;V. Casalegno;Louise Lever;J. Bushell;T. Lowe;A. Wallwork;P. Young;A. Lindemann;M. Schmidt;P. Mummery
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文献类型：
--
作者：
L. Evans;L. Margetts;V. Casalegno;Louise Lever;J. Bushell;T. Lowe;A. Wallwork;P. Young;A. Lindemann;M. Schmidt;P. Mummery
对聚变堆偏滤器的子部件--碳纤维复合材料铜块的热性能进行了有限元分析。高精度的模拟是使用一种新兴的技术--基于图像的有限元建模--创建的，该技术将X射线断层扫描数据转换为微观结构上忠实的模型，捕捉制造缺陷等细节。为验证计算结果，对碳纤维复合材料铜盘的激光闪光热分析进行了数值模拟，计算结果与实验结果可以直接比较。结果表明，高分辨率基于图像的模拟(32μm宽度的1.02亿个元素)比基于低分辨率图像的模拟(宽度为194μm的60万个元素)和理想化的计算机辅助设计模拟提供了更高的精度。使用这项技术分析单块模型，可以检测和量化碳纤维复合材料-铜界面脱粘区域的影响，这可能会影响部件性能和预期寿命。在理想化的计算机辅助设计模拟中，这些特征不会被考虑在内。
The thermal performance of a carbon fibre composite-copper monoblock, a sub-component of a fusion reactor divertor, was investigated by finite element analysis. High-accuracy simulations were created using an emerging technique, image-based finite element modelling, which converts X-ray tomography data into micro-structurally faithful models, capturing details such as manufacturing defects. For validation, a case study was performed where the thermal analysis by laser flash of a carbon fibre composite-copper disc was simulated such that computational and experimental results could be compared directly. Results showed that a high resolution image-based simulation (102 million elements of 32 μm width) provided increased accuracy over a low resolution image-based simulation (0.6 million elements of 194 μm width) and idealised computer aided design simulations. Using this technique to analyse a monoblock mock-up, it was possible to detect and quantify the effects of debonding regions at the carbon fibre composite-copper interface likely to impact both component performance and expected lifetime. These features would not have been accounted for in idealised computer aided design simulations.