Numerical study on the mechanical behavior of 3D four-directional braided C/C composites in high-temperature environments

作者：Haibo Luo, Chao Gao, Chunjian Mao, Chao Zhang · 发表于：Mechanics of Advanced Materials and Structures · 年份：2025 · DOI：10.1080/15376494.2025.2582798 · 被引用次数：2 · 研究领域：Advanced ceramic materials synthesis、Mechanical Behavior of Composites、Composite Material Mechanics

C/C textile composites exhibit exceptional mechanical performance at high temperatures and are widely utilized as high-performance thermal structural materials in high-tech industries. This article presents a meso-scale finite element model of 3D four-directional braided C/C composites to investigate the effects of temperature, braiding angle, and porosity on their mechanical properties. A thermo-mechanical coupled material constitutive model that incorporates temperature-dependent effects on material properties has been developed. A user-defined material subroutine related to the proposed constitutive model is programmed for integration with the ABAQUS/Standard solver. Utilizing the representative volume element model of the C/C composites, thermal expansion parameters are incorporated into both the fiber bundles and matrix. The temperature-dependent mechanical properties and damage behavior of C/C composites are analyzed in detail, providing theoretical support for understanding the mechanical response in high-temperature environments.