Project: Development and Test of a Backplate for EuroSID 2 (ES2)

Reference: S0212/VF

Last update: 02/09/2003 15:28:41


The project objective is to confirm that, by placing a suitable shield behind the dummy when preparing for a crash test, any non-biofidelic influence of the seat and seat cushions in the vehicles during testing will have no effect on dummy responses.


During EuroNCAP testing it has been observed that the backplate of EuroSID-1 can sustain considerable loads in side impact tests which can result in the dummy translating away from the impact zone, thus reducing the injury parameters that are measured on the dummy thorax (chest compression and V*C). ES-2 has been deigned to reduce this effect. Nevertheless, this phenomenon has been observed with ES-2 in some tests carried out by NHTSA and in Europe.

It is expected that this back plate effect could be overcome by using a suitable shield placed behind the dummy during installation, in preparation for a crash test, so that any non-biofidelic influence of the seat and seat cushions in vehicles would have almost no effect on dummy responses in side impact testing.


TRL Limited
Crowthorne House, Nine Mile Ride, Wokingham, Berkshire, RG40 3GA
+44 (0)1344 773131

Contract details

Cost to the Department: £31,000.00

Actual start date: 01 September 2002

Actual completion date: 28 February 2003


PR/SE/605/02. Evaluation of a Backshield for the ES-2 Dummy
Author: TRL Ltd
Publication date: 01/11/2002
Source: Contact
More information:

Summary of results

  1. The research arrived at the following conclusions:

    * the 4mm thick shield was found to have a minimal effect on biofidelity;
    * the sled tests were found to be more severe than full-scale tests, necessitating local reinforcement of one of the seats;
    * the means by which the shield was attached to the dummy did not sufficiently unload the back-plate or increase rib deflections; and
    * de-coupling of the shield from the back-plate should be investigated, perhaps using full-scale tests.

    It is therefore unlikely that ES-2 will be fitted with a coupled back-plate shield, at least not in the near future.