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Published on: June 28, 2015
Fracture Behavior and Mechanism of Ceramic Fiber Insulation Tiles: An Analysis Based on Experiment and Numerical
Yiming Wang1, Hong Ye2, Xiaoliang Ma1
1National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China.
Materials (Basel, Switzerland)
|August 13, 2026
Summary
This study investigates the fracture behavior of ceramic fiber insulation tiles (CFIT) using numerical simulations and experiments. Findings reveal how porosity, fiber dimensions, and defects influence CFIT fracture toughness, guiding material improvement.
Area of Science:
- Materials Science
- Mechanical Engineering
- Aerospace Engineering
Background:
- Ceramic fiber insulation tile (CFIT) is a brittle porous ceramic material vital for aerospace thermal protection due to its high-temperature stability.
- Its porous structure necessitates understanding fracture behavior and improving fracture toughness to prevent failures.
Purpose of the Study:
- To investigate the fracture behavior and toughening mechanisms of CFIT.
- To explore the influence of material properties and defects on fracture toughness.
- To provide theoretical guidance for enhancing the reliability of porous ceramic fiber materials.
Main Methods:
- Establishment of three-dimensional network and macroscopic finite element (FE) models of CFIT.
- Validation of the FE model against experimental fracture results.
- Systematic investigation of porosity, fiber length, diameter, and orientation effects on fracture toughness.
- Analysis of crack size and defect influence on fracture behavior.
Main Results:
- The macroscopic FE model's validity was confirmed through experimental comparisons.
- Porosity, fiber dimensions, and orientation significantly impact CFIT fracture toughness.
- Crack size and prefabricated defects were found to influence fracture behavior, with specific influence laws determined.
Conclusions:
- The study provides a comprehensive understanding of CFIT fracture behavior.
- Results offer theoretical guidance for optimizing CFIT design and improving its fracture toughness for aerospace applications.
- Understanding defect influence is crucial for material reliability.
Keywords:
ceramic fiber insulation tilecrack sizefinite element (FE) modelfracture behaviorthree-dimensional network modelMore Related Videos
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