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Performance and Damage Study of Composite Rotor Blades under Impact
Guorui Yu1, Xiaobin Li1, Wenjun Huang1
1AVIC China Helicopter Design and Research Institute, Jingdezhen 333001, China.
Polymers
|March 13, 2024
Summary
This study investigated the ballistic performance of composite helicopter blades, finding that damage types include delamination and fiber breakage. A validated numerical model aids in predicting blade vulnerability in battlefield environments.
Area of Science:
- Materials Science
- Aerospace Engineering
- Mechanical Engineering
Background:
- Composite helicopter blades are critical for aircraft survivability in combat.
- Understanding ballistic performance is essential to mitigate helicopter vulnerability.
Purpose of the Study:
- To investigate the ballistic performance and damage characteristics of composite helicopter blades.
- To develop and validate a numerical simulation model for predicting ballistic damage.
Main Methods:
- Experimental testing of composite rotor blades under ballistic impact.
- Development of a 3D progressive damage failure model using Abaqus software.
- Verification of the numerical model against experimental results.
Main Results:
- Ballistic damage includes delamination, fiber breakage, and foam collapse.
- Impact location influences damage type: shear fracture at incidence, tensile fracture at exit.
- Damage size is affected by impact angle and structural stiffness.
Conclusions:
- The numerical simulation model accurately predicts composite blade ballistic damage.
- Incident angle and exit structure stiffness are key factors influencing damage.
- The model provides a valuable reference for enhancing helicopter survivability.
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