Lightweighting and steel technologies in the all-new

2018-11-12 13:12:00
LUQIMENG
Original
2461
 The new sedans
 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

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