Mr Petit provided an update on the progress on the development of the ISO/WG6 WorldSID 50th injury risk curves (PSI-02-15). Mr Petit advised that the ISO/WG6 had agreed to use the survival analysis statistical method to construct the injury risk curves. To enable injury criteria limits to be finalised the ISO/WG6 will now need to establish the most suitable injury risk predictors for each body region (e.g. pelvis injury risk could be predicted by 3ms pelvis acceleration and/or pubic force) and the recommended thresholds. The same process would need to be followed for the WorldSID 5th. WG6 would meet again in May.

Mr Belcher presented data (2000-2009) on fatalities and serious injuries in Victorian (Australian state) side impact crashes by occupant age (PSI-02-16). It was noted that the 45 year age, which is currently used for the age scaling of current side impact dummy injury risk curves, exceeds (by age) around 85% of Victorian pole/tree side impact crash fatalities, but only around 50% of other side impact fatalities.

Mr Ridella presented a summary of an UMTRI investigation of the effects of occupant age on AIS 3+ injury outcomes (PSI-02-17). Mr Ridella undertook to investigate with UMTRI the possibility of separating pole side impacts from other side impacts in the data presented in this study. In response to a question from Ms Tylko, Mr Ridella indicated that while it would decrease the number of available cases, it was possible to identify contact point in the NASS data base.

UMTRI reported on PMHS and WorldSID 50th male dummy abdomen comparison testing using a two-mass sled system to obtain the typical side impact crash signature. Biofidelity targets were generated using the techniques from the ISO frontal biofidelity group chaired by Matthieu Lebarbe. Results indicate that the WorldSID abdomen does not deform as much as the PMHS under similar loading conditions. The WorldSID pelvis may need to be less stiff and have a less tightly coupled mass. Additionally, the thigh flesh may also be too stiff. The full analysis and results are published in ESV Paper 11-0080.

NHTSA presented testing conducted by UMTRI comparing PMHS thorax and pelvic responses to WorldSID 50th male dummy responses. The PMHS and dummies were impacted by a padded wall, first at 3 m/s and then at 8 m/s. It was found that the WorldSID abdomen does not deform as much as the PMHS abdomen under similar conditions and is somewhat less rate sensitive. The WorldSID pelvis forces were higher than the PMHS response corridors sat 8 m/s, but the WorldSID pelvis Y-axis was within the response corridors, suggesting that the WorldSID pelvis may too stiff. Future testing may include a comparison study of the 5th female, depending on the availability of PMHS.

UMTRI reported on PMHS and WorldSID 50th male dummy abdomen comparison testing using a two-mass sled system to obtain the typical side impact crash signature. Biofidelity targets were generated using the techniques from the ISO frontal biofidelity group chaired by Matthieu Lebarbe. Results indicate that the WorldSID abdomen does not deform as much as the PMHS under similar loading conditions. The WorldSID pelvis may need to be less stiff and have a less tightly coupled mass. Additionally, the thigh flesh may also be too stiff. The full analysis and results are published in ESV Paper 11-0080.