Approaches of load assumption for durability assessment of automotive structure

Abstract

As an essential part of the product development and design, the derivation of load assumptions and design requirements has to reflect the concept of the product verification process. An overview is given on the key elements of the process of defining load assumptions for passenger cars where the full set of external loads acting on a vehicle has to be considered, but also the structural response, which leads to the final load requirements on a component level. Some information is presented on the process where load assumption and strength and fatigue design requirements are derived on the basis of a number of sources including systematic measurements on new vehicles, consolidation of measurements within a load data-base, numerical analyses and customer usage surveys. The topic of standardised load-time histories is added by a comparison of load requirements given by CARLOS multi to those obtained from a test track.Keywords: Normalisation of load data / load data of customer usage / MBD simulation / standardised load-time history CARLOS multi / 1 Einleitung

Influence of tire sizes over automobile body spectrum loads and fatigue damage accumulation

“…Petracconi et al [11] also instrumented a tow hook assembly of a passenger's vehicle, obtaining a spectrum with qualitative similarities to the ones obtained in the present work. The standardized CARLOS spectra, on the other hand, show similar behavior as the ones obtained in the present work, but without the calm regions [12,13].…”

An Investigation of Representative Customer Load Collectives in the Development of Electric Vehicle Drivetrain Durability

“…This often requires the component to endure corresponding to the 1% quantile in customer operation with a probability of 99 this context, the term '1% customer' is often used to refer to a customer who expe damage or stress higher than the remaining 99% of customers. In the German auto industry, it is expected that the drivetrain should be able to withstand a mileage of 300,000 km without failure, even for the 1% of customers who exert the most stress product [50][51][52]. This expected target mileage nowadays depends on the in application of the vehicle.…”