Lightweighting and steel technologies in the all-new
- 2018-11-12 13:12:00
- LUQIMENG Original
- 2461
Mass reduction hierarchy
Part sharing
Steel technologies
Crash examples
2016 Chevrolet Malibu
• 9th generation
• 111” wheelbase
• Sold in 18 countries around the world
• 3 assembly sites (Fairfax, China, Korea)
2017 Buick LaCrosse
• 3 rd generation
• 114” wheelbase
• Sold in US, Canada and China
• 2 assembly sites (Detroit Hamtramck & China)
All-New 1.5L Turbo
• 6-speed auto transmission
• 160 hp / 184 ft-lb of torque
2.0L Turbo
• 8-speed auto trans
• 250 hp / 258 ft-lb of torque
1.8L Hybrid
• 60 cell / 1.5 kWh Li-Ion battery
• Leverages Volt technology
• Control of architectural bandwidth
• Execution excellence
(short flanges, scallops, lightening holes, etc)
• Control of architectural bandwidth
• Efficient integration of systems
• The right performance targets
• Aggressive CAE iteration & optimization
• Efficient design fundamentals
• The right steel grades
• Execution excellence
(short flanges, scallops, lightening holes, etc)
• Control of architectural bandwidth
• Efficient integration of systems
• The right performance targets
• Aggressive CAE iteration & optimization
• Efficient design fundamentals
• The right steel grades
• Execution excellence
(short flanges, scallops, lightening holes, etc)
• Control of architectural bandwidth
• Efficient integration of systems
• The right performance targets
• Aggressive CAE iteration & optimization
• Efficient design fundamentals
• The right steel grades
• Execution excellence
(short flanges, scallops, lightening holes, etc)
• Thin skins
• Stable sections
• Bulkheads
• Local reinforcement
• Bolt-in struts
Achieves key target for dynamic stiffness
Low mass - very effective
Allows lean “down-rigger” structure
54 meters of structure adhesive
Supplements spot welds
Improved durability at thin gauges
Enhances stiffness
Arc welding/brazing
Used in high value areas
Allows single sided joining
Allows smaller, stiffer sub-assemblies
• Control of architectural bandwidth
• Efficient integration of systems
• The right performance targets
• Aggressive CAE iteration & optimization
• Efficient design fundamentals
• The right steel grades
• Execution excellence
(short flanges, scallops, lightening holes, etc)
Co-formed dash
& constrained
layer doubler
Co-formed PHS B-pillar
and reinforcement
• PHS patch on PHS pillar
• Avoids dimensional issues
• Maximizes weld flats
• Steel-viscoelastic-steel
sandwich in key N&V area
• Net vehicle mass savings
(lower acoustic mass)
Vehicle deflection Strong back-up structure
• Bolt-on body parts
• Cradle deflector
• High part strength
• High weld strength