Multiscale Numerical Modeling of 2D C/C Composites Considering Pore Size Distribution
Publication: Journal of Aerospace Engineering
Volume 37, Issue 4
Abstract
This study proposes a multiscale numerical modeling procedure to evaluate the elastic properties of two-dimensional (2D) eight-harness satin woven carbon/carbon (C/C) composites. The multiscale modeling technique consists of analysis at the microlevel and mesolevel. In microscale analysis, a 3D representative volume element (RVE) of C/C composite with carbon fiber, pyrolytic carbon, and pores is considered. The microstructure of the C/C composite is analyzed using scanning electron microscope (SEM) images. Statistical characterization of pore distribution inside the C/C composite is performed, and different probability density functions are generated for pores’ number, area, and aspect ratio inside the C/C composite. Carbon fibers and pores are inserted in the 3D RVE using the RSA algorithm. The size and shape of the pores inserted in 3D RVE are based on the probability density functions generated. Effective elastic properties of C/C composite at the microscale are computed by finite element analysis (FE) based homogenization and taken as input for the next level of homogenization. The RVE at mesoscale is modeled using the information from SEM images, and FE-based homogenization is performed to compute the effective elastic properties of 8HS woven C/C composite. The effective elastic properties obtained from the numerical study are validated with the results of the uniaxial tensile test performed on 2D C/C composite. The effect of fiber volume fraction, yarn volume fraction, and porosity on elastic properties of 2D 8HS woven C/C composite are also assessed and presented in this study.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors are thankful to VSSC, ISRO for providing C/C composite samples. Nanoindentation tests were performed at CMTI Bengaluru. Uniaxial tensile tests were performed at BMSCE Bengaluru.
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© 2024 American Society of Civil Engineers.
History
Received: Aug 18, 2023
Accepted: Dec 14, 2023
Published online: Mar 18, 2024
Published in print: Jul 1, 2024
Discussion open until: Aug 18, 2024
ASCE Technical Topics:
- Analysis (by type)
- Composite materials
- Design (by type)
- Elastic analysis
- Engineering fundamentals
- Engineering materials (by type)
- Finite element method
- Materials engineering
- Methodology (by type)
- Models (by type)
- Multiscale methods
- Numerical analysis
- Numerical methods
- Numerical models
- Structural analysis
- Structural design
- Structural engineering
- Two-dimensional models
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