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CARLOS-multi - a multiaxial fatigue loading standard for car wheel suspensions

CARLOS-Multi - eine mehraxiale Standardlastfolge für PKW-Radaufhängungen
: Klätschke, H.; Schütz, D.

Associazione Tecnica dell' Automobile -ATA-, Torino:
Innovation and reliability in automotive design and testing. Proceedings of the 3rd International Conference. Vol.2
Torino, 1992 (Bericht - Fraunhofer-Institut für Betriebsfestigkeit Darmstadt)
ISSN: 0721-5320
pp.1231-1249 : Abb.,Tab.,Lit.
Innovation and Reliability in Automotive Design and Testing <3, 1992, Firenze>
Conference Paper
Fraunhofer LBF ()
Fahrzeugbau; fatigue life estimation; fatigue loading; Lastspektrum; Lebensdauerabschätzung; load spectrum; measurement; mehrachsige Beanspruchung; Messung; multiaxial loading; passenger car; Personenkraftwagen; Radaufhängung; Schwingbeanspruchung; standardized load sequence; Standardlastfolge; vehicle construction; wheel suspension

In cooperation with staff of 14 European car maufactures, see Fig. 1 the so called "CARLOS-Load sequences" have been developed respectively are under development. Three CARLOS uniaxial sequences for the vertical, lateral and longitudinal forces acting at the tyre contact centre of a passenger car front axle were derived. This work was finished in 1990 and the CARLOS sequences are already used in the car industry and in institutes for a variety of different purposes when doing fatigue test with coupons or components. The so called "multiaxial CARLOS load sequence" which combines the different load directions so that a fatigue test with a full wheel suspension or parts of it is possible is well advanced in the development. After a general description of the aim of a standardized load sequence the steps in deriving a standard are explained. In the last part ot the paper the additional technics necessary for deriving "CARLOS Multi", the first multiaxial standard, will be described.