Ultra-High-Temperature Plastic Constitutive Relations of Carbon Fiber Reinforced Silicon Carbide Minicomposites: Experiment and Modeling

LI Siru; JI Honglei; MA Zhiqi; CHENG Tianbao; CHEN Liming

doi:10.21656/1000-0887.460072

Volume 47 Issue 5

May 2026

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Article Navigation > Applied Mathematics and Mechanics > 2026 > 47(5): 541-549

LI Siru, JI Honglei, MA Zhiqi, CHENG Tianbao, CHEN Liming. Ultra-High-Temperature Plastic Constitutive Relations of Carbon Fiber Reinforced Silicon Carbide Minicomposites: Experiment and Modeling[J]. Applied Mathematics and Mechanics, 2026, 47(5): 541-549. doi: 10.21656/1000-0887.460072

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Ultra-High-Temperature Plastic Constitutive Relations of Carbon Fiber Reinforced Silicon Carbide Minicomposites: Experiment and Modeling

doi: 10.21656/1000-0887.460072

College of Aerospace Engineering, Chongqing University, Chongqing 400030, P.R. China

Received Date: 2025-04-10
Rev Recd Date: 2025-05-01
Publish Date: 2026-05-01

Abstract

Abstract

Advanced ceramic matrix composites have excellent properties, such as resistance to ultra-high temperatures and corrosion, as well as high specific strength and stiffness. They are important candidates for thermal protection materials and structures of new-generation hypersonic vehicles. However, ceramic matrix composites have complex microstructures and various damage mechanisms, which make the study of their constitutive relations challenging. Minicomposites are the critical link in the multi-scale study of ceramic matrix composites. The study on their mechanical behaviors is important to the development and evaluation of security and reliability of advanced ceramic matrix composites. The tensile properties of C/PyC/SiC minicomposites were measured at 2 200 ℃ in inert atmospheres for the first time based on the indirect induction heating technology. The plastic deformation behaviors of ceramic matrix composites under ultra-high-temperature extreme environments were revealed. The random cracking of matrix was characterized by a 3-parameter Weibull model. The stress distributions of fiber and matrix were calculated based on the slip-lag model. The effects of ultra-high-temperature nonlinear deformation of fiber bundles and residual thermal stresses in the composites were characterized. An ultra-high-temperature plastic mesoscale constitutive model was established for C/PyC/SiC minicomposites and verified. The study is useful for the development of mechanics for ceramic matrix composites and provides experimental and theoretical supports for the reliability evaluation and life prediction of ceramic matrix composites on the hypersonic vehicles.
- ceramic matrix composite,
- ultra-high-temperature extreme environment,
- plastic constitutive

(Contributed by CHEN Liming, Member of the Editorial Board of AMM)

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References(20)

References

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