|
|
The Automotive Steel Design Manual Project provides the design
engineer with first order analysis tools to assist in optimizing
sheet steel automotive body designs. There are two components:
the Automotive Steel Design Manual (ASDM), a 705 page printed
document, and the Computerized Application and Reference System
(CARS), a powerful software system.
The Body Systems Analysis Project analyzes and quantifies
the capabilities of lightweighting manufacturing processes and
technologies.
The Enhanced Forming Limit Project develops criteria to
more accurately predict the formability of sheet steels that have
been deformed over draw beads.
The
High Strength Steel Stamping Projects target the expanded
use of high strength steels. The DaimlerChrysler effort on this
project seeks to validate and improve currently available modeling
information to provide reliable springback prediction technology.
The General Motors work is focused on development of an empirical
knowledge base for use in the die development, design and tryout
phases.
The Hydroforming Materials and Lubricants Project is working
to improve finite modeling capability for hydroforming applications.
Three areas under study are measurement of tube mechanical properties,
assessment of the forming limit curve for hydroforming applications,
and corner-fill experiments with mild and high strength steels.
The Joining Technologies Project combines the activities
of the former Adhesive Bonding and Resistance Welding Projects
to address joining technologies for advanced and ultra high strength
steels. The new initiatives include the weldability of the advanced
high strength steels, the efficacy of weldbonding on weld quality,
and the impact properties of welded and bonded assemblies.
The Lightweight Closures Project has selected the design
of the front door for a 2002 model year SUV as the basis of a
study to reduce mass by as much as 25% while minimizing increased
manufacturing cost. Future phases will address rear doors, hoods,
rear compartment lids, liftgates, tailgates and sliding doors.
The Lightweight Front End Project is a two phase analysis
effort to study the cost and mass effect of practical variations,
in automotive front end structure design, required to accommodate
vehicle options within a given vehicle family.
The Lightweight SUV Frame Project is focusing on efforts
to reduce the weight of SUV frames by 25%. The first phase of
the program is a feasibility study on one SUV frame and a second
phase will refine the findings of the feasibility study through
detailed cost analyses and crash modeling. Two additional SUV
frames of other classes will be analyzed for weight reduction
opportunities in future activities.
The Material Uniformity Project has documented the uniformity
of mechanical and other critical properties of automotive sheet
steels. Specific areas examined in this now inactive project include
tensile strength, yield strength, elongation, and hardness, along
with coating weights, thickness variation and surface roughness.
The Tooling Standardization Groups have developed the NAAMS
Global Standard Components for both assembly and stamping tooling.This
ongoing effort has significantly reduced the time and cost of
designing and building assembly and stamping tools through the
standardization of components. Essentially, all components reflect
metric standards.
The Sheet Steel Fatigue Project develops fatigue data for
a range of sheet steels that will be used in durability models
to improve automotive design.
The Standardized Corrosion Test Project has standardized
an accelerated laboratory test procedure, SAE J2334, to measure
cosmetic corrosion on automotive body panels and to correlate
with five-year field test results. Current work involves perfecting
a standard perforation corrosion test to measure and correlate
with field results.
The Strain Rate Characterization Project documents mechanical
properties of steels at high strain rates to improve the computer
modeling of crash simulations.
The Tailor Welded Blank Project has completed several publications
on Tailor Welded Blank design, manufacturing and cost considerations.
Current activities support the Lightweight Front End Structure
Project with HSS TWB research and the Lightweight Closure Project
through the study of 'patch' type tailored blanks. Additionally,
research on Tailor Welded Tubes is being planned.
The Tribology Project will enhance the understanding of
the effects of lubricants on springback variation and die wear
associated with the stamping of High Strength and Ultra High Strength
steels.
|