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Home -> Research Groups -> Computational Manufacturing and Design -> Projects -> Cadillac Control Arm Lightweight Design
Project
Cadillac Control Arm Lightweight Design
Description:
Prioritization of Critical Areas
Comparison of Analysis Results With Experiments
Improvements from Redesign
Achievements
• 25% weight savings
• 100% increase in fatigue life
• 50% increase in load-bearing capacity
• $2 per part manufacturing cost savings
Project
Cadillac Control Arm Lightweight Design
Description:
Employ computational modeling to reduce the weight of a Cadillac control
arm.
Control Arm Component
Scientific Merit
Development and implementation of multi-scale material modeling methodology
Microstructure-Property Model Parameters
- Plasticity/Damage Inputs
- 21 constants for plasticity determined from different strain rate
and temperature tests under compression
- 6 constants for void nucleation, void growth, and void coalescence - Microstructure-Defect Inputs
- Silicon (volume fraction, size distribution, nearest neighbor distance)
- Porosity (volume fraction, size distribution, nearest neighbor distance)
- Dendrite Cell Size distribution
- Other inclusion features (e.g., oxides, etc) - Outputs
- Time and location of failure on complex geometry
- Bauschinger effect
- Various strain rate and temperature histories
- Various loading path sequences (eg, fatigue followed by tensile loading, etc)
- Implemented in ABAQUS finite element code
Prioritization of Critical Areas
Comparison of Analysis Results With Experiments
Improvements from Redesign
Achievements
• 25% weight savings
• 100% increase in fatigue life
• 50% increase in load-bearing capacity
• $2 per part manufacturing cost savings
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