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Reduction of Test Time in Multi-Axial Fatigue Tests Under Operational Stresses By the Lbf Simultaneous Procedure
Technical Paper
977023
Sector:
Language:
German
Abstract
Among others, the object of the test methodology in operational
tests is to minimize test times and costs.
The fatigue tests of newly developed vehicle components on trial
station test courses is costly and lengthy. Due to driver and
weather influences the trial station tests cannot be completely
reproduced.
Therefore, beginning in the Seventies, the operational strength
of components and complete assemblies was determined faster, more
cost effective and was more precisely reproduced by one- and
multi-axial operational stress simulations in the laboratory.
For time and cost reasons, any required design revisions must be
made during the initial development phase. The operational strength
of the newly developed components must be established quickly and
reliably at this early stage.
The simultaneous process makes it possible to carry out time-
condensed multi-axial operational stress simulations that are in
accordance with the original conditions of the externally applied
forces as measured in actual operation. The process and the
software for signal evaluation were developed by the Fraunhofer-
Institut für Betriebsfestigkeit (Fraunhofer Institute for
Operational Strength), Darmstadt. The practical simultaneous
process tests have been carried out since 1993 in the Adam Opel AG
laboratories.