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The objective of this study was to determine dynamic tensile characteristics of various door trim materials and to recommend a practical test methodology. In this study, Polypropylene (PP) and Acrilonitryl Butadiene Styrene (ABS) door trim materials were tested. Slow speed (quasi-static-0.021 mm/s) and high speed tests were conducted on a closed loop servo-hydraulic MTS system. The maximum stress of these materials increased from quasi-static to dynamic test conditions (as much as 100%). The dynamic stiffness of PP increased two times from quasi-static tests. No significant change in stiffness was observed for ABS during quasi-static and dynamic tests at different strain-rates. Quasi-static and medium strain-rate (10-20 mm/mm/s) tests may be adequate in providing data for characterizing the dynamic behavior of trim materials for CAE applications. Strain gages can be used to measure the quasi-static and in some cases, dynamic strain.

The aim of this study was to understand the behavior of Eurosid rib module and its components under different impact conditions. This was achieved by impacting the single rib module at two different velocities of 7.6m/s and 10.8m/s at three impact angles of 0, +30 and -30 deg corresponding to each velocity. All tests were done using a 1.86 kg (4.1 lbs), 152 mm (6″) circular impactor on the Monterey facility (Linear impactor) and some of the tests were filmed at 5000 fps. Tests were also done with and without tuning spring to assess its contribution to the total rib response. The hydraulic damper and damper spring were dynamically tested at different velocities to obtain their individual characteristics of force-velocity and force-deflection respectively. Static force-deflection characteristics of all the four tuning springs and damper spring were also obtained. The results of single rib tests @ 0 deg were compared with the CAE models currently available in MADYMO-3D and RADIOSS.