DESIGN OF RELIABLE ACCELERATED FATIGUE TEST PROGRAMS BASED ON REAL MARKET USE 2010-36-0029
Durability is one of the most important goals in the current
state-of the-art design of new vehicles. Usually the durability
performance is validated by the vehicle manufacturers driving
directly the prototypes in field or through endurance schedules on
proving ground fatigue surfaces. The validation procedure driving
directly in field is very expensive and time-consuming. The
reliability and accuracy of validations in proving ground surfaces
are many times unknown, mainly because such endurance schedules are
not fitted to the market (driving conditions and type of roads) and
historically are based on empirical procedures.
This paper discusses how IDIADA has developed a methodology to
design accelerated durability schedules which obtain less expensive
and fast durability validation procedures, as well as being
reliable and fitted to the market and durability targets.
The development of the methodology is based on the analysis and
extrapolation of the information collected directly in market (Road
Load Data) in order to design endurance schedules using the
accelerated fatigue surfaces of the proving grounds.