Identification of component material in-situ properties of C/SiC composites based on self-consistent clustering analysis and Bayesian method

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2024-10-30 DOI:10.1016/j.compstruct.2024.118686

Bo Gao, Xinhang Dai, Hongyue Wang, Xinliang Zhao, Chenghai Xu, Qiang Yang, Songhe Meng

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引用次数: 0

Abstract

In the paper, a method for identifying the mechanical properties of the in-situ component materials in carbon fiber reinforced silicon carbide ceramic matrix composites based on the macro mechanical test data is proposed. Firstly, the computation efficiency of considering damage behavior in the meso-mechanial model is improved through the self-consistent clustering analysis. Subsequently, sensitivity analysis is introduced in the parameter identification based on the Bayesian network to reduce the number of parameters to be identified simultaneously, thereby alleviating the ill-posedness of the inverse problem. Numerical and experimental cases were conducted to validate the proposed method. The maximum error of parameter identification is 6.0 % and the prediction error for strength is only 1.7 % in the numerical case with 5 % Gaussian noise. In the experimental case, the stress–strain curve calculated using the identified results shows good agreement with the experimental data. The prediction error for strength is only 2.2 %, while the maximum deviation between the identified results and the reference value in the literature can be up to 50 %, indicating the importance of obtaining the properties of component materials in-situ.

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基于自洽聚类分析和贝叶斯方法的 C/SiC 复合材料成分材料原位特性鉴定

本文提出了一种基于宏观力学测试数据识别碳纤维增强碳化硅陶瓷基复合材料中原位成分材料力学性能的方法。首先，通过自洽聚类分析提高了中观力学模型中考虑损伤行为的计算效率。随后，在基于贝叶斯网络的参数识别中引入了灵敏度分析，减少了需要同时识别的参数数量，从而缓解了逆问题的拟合不良性。为验证所提出的方法，进行了数值和实验验证。在高斯噪声为 5% 的数值情况下，参数识别的最大误差为 6.0%，强度预测误差仅为 1.7%。在实验情况下，利用识别结果计算出的应力-应变曲线与实验数据显示出良好的一致性。强度的预测误差仅为 2.2%，而识别结果与文献参考值之间的最大偏差可达 50%，这表明在原位获得组件材料特性的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.