Ply Stack Up Optimization of a Fomula Student CFRP-Rim

Alexander Grassl

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Agenda

• Formula Student

• Starkstrom Augsburg e.V.

• Current Status

• CFRP-Hybrid Rim

• Optimization

• Weight Comparison

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Formula Student

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• 152 FSE Teams from 37 Countries• 419 FSC Teams from 52 Countries

Starkstrom Augsburg e.V.

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UASA1504 – Cedur

Weight 252 kg

Power 80 kW

Torque 1200 Nm

Acceleration 0-100 km/h – 3,2 sec

Current Status

• 13“ Aluminum Rim

• 3500g Weight

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CFK-Hybrid Rim

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• Wheel Star made out of high strength Aluminum

• External laminated Rim Base from CFRP Prepreg Fabric

• 2 Component Epoxy bonding on large surface area

• Additional Bolting

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CFK-Hybrid Rim

CFK-Hybrid Rim

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• Biaxial Chassis Dynamometer

• Realistic Load Condition

Optimization - Workflow

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Optimization – Sensitivity Analysis

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Optimization - Results

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Optimized CFRP-Hybrid

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Weight Comparison

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• Weight Reduction Wheel Base: 18%

• Weight Reduction Overall: 40%

Supporter

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