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Study of matrix crack-tilted fiber bundle interaction using caustics and finite element method.
Wenfeng Hao1, Jianguo Zhu1, Qi Zhu1
1Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
The Review of Scientific Instruments
|March 3, 2016
Summary
This study investigated matrix crack and tilted fiber bundle interactions using caustics and finite element analysis (FEA). Results show FEA validates experimental stress intensity factor measurements, confirming the fiber bundle
Area of Science:
- Materials Science
- Fracture Mechanics
- Composite Materials
Background:
- Understanding crack propagation in composite materials is crucial for structural integrity.
- Fiber reinforcements significantly influence crack behavior and material toughness.
- Investigating the interaction between matrix cracks and fiber bundles provides insights into damage mechanisms.
Purpose of the Study:
- To investigate the interaction between a matrix crack and a tilted fiber bundle.
- To analyze the shielding effect of the fiber bundle on crack propagation.
- To validate experimental findings using computational methods.
Main Methods:
- Caustics method to observe crack tip phenomena and extract stress intensity factors.
- Finite Element Method (FEM) using ABAQUS for numerical simulations.
- Experimental analysis of caustic patterns at varying distances from the fiber.
Main Results:
- Caustic patterns revealed stress intensity factors influenced by fiber proximity.
- The fiber bundle exhibited a shielding effect on the matrix crack.
- FEM simulations successfully replicated experimental stress intensity factor data.
- Excellent agreement was found between experimental and FEM results.
Conclusions:
- Caustics and FEM are effective tools for analyzing crack-fiber interactions.
- Fiber bundles play a significant role in mitigating crack driving forces.
- The study validates the predictive capabilities of computational models in composite fracture analysis.
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