Parametric Mesoscale Modeling and Reliability Assessment of Plain Woven SiCf/SiC Composites with Machined Holes

IF 3.9 4区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Applied Composite Materials Pub Date : 2026-09-30 DOI:10.1007/s10443-026-10546-2

Jinquan Deng, Xin Li, Xi Liu, Guican Wang, Penghui Ma, Yan Yan, Jinchao Pan, Dianyin Hu, Jiaqiang Li

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引用次数: 0

Abstract

To address the strength dispersion in plain-woven ceramic matrix composites with machined holes, this study presents an integrated framework for parametric mesoscale modeling and reliability assessment. Based on CT-characterized meso-structural features, a parametric modeling methodology was developed to systematically investigate the positional effects of holes within a weaving period. Experimental observations and numerical simulations revealed significant quasi-brittle fracture characteristics, resulting in uneven 3D fracture surfaces. The results demonstrate that hole position variations can cause a 26.8% difference in ultimate strength, corresponding to a strength difference of 78.2 MPa between the optimal (0.62, 0.68) and the most critical (0.95, 0.001) positions. Reliability analysis using 10,000 Monte Carlo simulations yielded a mean structural reliability of 0.6132. Through inverse reliability evaluation, a high-reliability (R ≥ 0.95) design boundary was established by setting the reference strength at 88.8% of the mean fracture strength. The proposed tolerances of ± 0.15 (warp) and ± 0.3 (weft) per weaving period can enhance structural reliability by approximately 25% under current manufacturing conditions. This integrated approach provides a quantitative basis for the reliability-based design of CMCs with machined holes, offering significant engineering value for aero-engine hot-section applications.

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机械孔SiCf/SiC平编织复合材料的参数中尺度模拟及可靠性评估

为了解决带有加工孔的普通编织陶瓷基复合材料的强度分散问题，本研究提出了一个参数化中尺度建模和可靠性评估的集成框架。基于ct表征的细观结构特征，建立了一种参数化建模方法，系统地研究了编织过程中孔洞的位置效应。实验观察和数值模拟显示了明显的准脆性断裂特征，导致三维断口表面不均匀。结果表明，孔洞位置的变化会导致极限强度差异26.8%，即最优位置（0.62,0.68）与最关键位置（0.95,0.001）之间的强度差异为78.2 MPa。可靠性分析使用10,000蒙特卡罗模拟得到的平均结构可靠性为0.6132。通过反可靠性评估，将参考强度设为平均断裂强度的88.8%，建立高可靠性（R≥0.95）设计边界。在目前的制造条件下，每个编织周期的±0.15（经纱）和±0.3（纬纱）公差可以将结构可靠性提高约25%。这种集成方法为基于可靠性的加工孔cmc设计提供了定量依据，对航空发动机热截面应用具有重要的工程价值。

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

Applied Composite Materials 工程技术-材料科学：复合

CiteScore

4.20

自引率

4.30%

发文量

审稿时长

1.6 months

期刊介绍： Applied Composite Materials is an international journal dedicated to the publication of original full-length papers, review articles and short communications of the highest quality that advance the development and application of engineering composite materials. Its articles identify problems that limit the performance and reliability of the composite material and composite part; and propose solutions that lead to innovation in design and the successful exploitation and commercialization of composite materials across the widest spectrum of engineering uses. The main focus is on the quantitative descriptions of material systems and processing routes. Coverage includes management of time-dependent changes in microscopic and macroscopic structure and its exploitation from the material''s conception through to its eventual obsolescence.