Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 15, Issue 12, Pages 23389-23407Publisher
MDPI
DOI: 10.3390/ijms151223389
Keywords
fiber-reinforced ceramic matrix composites; homogenization; interface effect; tensile strength; finite element method
Funding
- National Natural Science Foundation of China [11162014, 11372126]
- Endeavour Research Fellowship Program
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A three-dimensional (3D) representative volume element (RVE) model was developed for analyzing effective mechanical behavior of fiber-reinforced ceramic matrix composites with imperfect interfaces. In the model, the fiber is assumed to be perfectly elastic until its tensile strength, and the ceramic material is modeled by an elasto-plastic Drucker-Prager constitutive law. The RVE model is then used to study the elastic properties and the tensile strength of composites with imperfect interfaces and validated through experiments. The imperfect interfaces between the fiber and the matrix are taken into account by introducing some cohesive contact surfaces. The influences of the interface on the elastic constants and the tensile strengths are examined through these interface models.
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