Durability Validation for Variable Vehicle Usage
2022-01-0295
03/29/2022
- Event
- Content
- Durability engineering for vehicles is about relating real operational loading to the actual strength of the product and its components. In the first part of this presentation, we show how to calculate failure probabilities and safety factors based on the load and strength distributions. We discuss the uncertainty within the estimations, which is considerably large in case of extremely small failure probabilities as required for safety critical components. In the second part, we focus on modelling and simulating the loads based on real vehicle usage, such that the resulting statistics allows to understand and quantify the usage variability. The idea is, to simulate thousands of vehicle life spans of, say, 300.000 km or 15.000 h of operation each. The input data for such simulations typically consists of a combination of geographic data (like road network, topography, road conditions, traffic data, and points of interest) and properly segmented rich data from measurement campaigns. The results are statistically well qualified durability load distributions, and load targets, given as high quantiles of those distributions. Finally, we present specific applications of this process, using the Fraunhofer software tools VMC and USim (‘virtual measurement campaign / usage simulation’), in vehicle engineering projects for van and truck applications in Europe and in China.
- Citation
- Dressler, K., "Durability Validation for Variable Vehicle Usage," SAE Technical Paper 2022-01-0295, 2022, .