A method for the modeling of HVAC units (Heating, Ventilation, Air Conditioning) for crash simulation was developed. Impact tests were carried out for the validation of the simulation method. In preliminary material tests the tensile stress of the plastic materials was determined under different tensile velocities. Based on the material data, finite element models of HVAC units in different assembly states ere built up. Various simulations under different impact loads and in different test set-ups were performed. These load cases were also assigned to real tests of real parts and the results from both the simulation and the tests were compared. Based on the results, a new modeling guideline for crash simulation of HVAC units at Behr was developed. Compared to the old standard, a much better correlation was found both in the physical behavior of forces and displacements and in the collapse behavior. Although this new methodology highly improves the standard, there are still open issues that lead to slight differences in the behavior and that should be analyzed in further steps. For these further steps, cooperation with an OEM or interior manufacturer is necessary.
Virtual crash analysis of HVAC units
Virtuelle Aufprall-Analyse von Heizungs- und Klimatisierungseinheiten
2009
11 Seiten, 10 Bilder
Aufsatz (Konferenz)
Englisch
Virtual crash analysis of HVAC units
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