Standardisierte Lastabläufe für Bauteile von PKW Radaufhängungen -CARLOS-

For fatigue programmes with a general topic standardized load-time histories are used since the time when servohydraulic testing was introduced to get a better means of comparison of the results. Standardized load-time histories where developed e.g. for components of aircraft, helicopters, offshore structures, windturbines. In a joint venture of two institutes (LBF, IABG) ten European car manufacturers and two manufacturers of servohydraulic test equipment three standardized load-time histories for components of front wheel suspensions were developed (CARLOS-vertical, -lateral, -longitudinal). The basis for the derivation of these standards were measurements with ten cars (about 6000 km) on public roads, maximum value measurements on proving grounds and agreements of all participating parties on the mission profile. The generation of the load-time histories was performed with rainflow reconstitutions and a service-like mixture of different road conditions. To reduce testing time small load cycles were omitted. The standardized load-histories are stored as a sequence of turning points on digital magnetic tape which can be requested from LBF.