Attachment_J.1.pdf

Attachment J.1 Test Parameters and Sled Buck Specifications

The SISA test fixture consists of two distinct parts: the primary carriage and the secondary carriage (Figure 1). The primary carriage is fixed to the bed-plate of the deceleration sled and consists of the fixture base plate, door fixture (with foams), aluminum honeycomb, and an anti-rebound mechanism. The secondary carriage is free to move on a set of linear bearings affixed to the primary carriage base plate. The secondary carriage consists of the generic vehicle seat (with foam and cover), the CRS being tested, and the test ATD. The side impact fixture is attached to the sled mechanism at a 10-degree angle with respect to the forward motion of the driven sled (Figure 2).

Figure 1: Side view of the side impact fixture attached to the deceleration sled

Door Impact End

Attachment J.1 Test Parameters and Sled Buck Specifications

Figure 2: Depiction of the 10 degree secondary sled CCW rotation angle with respect to the longitudinal axis of the primary sled (not to scale)

The specifications for the fixture include:

• An armrest foam, door foam and honeycomb to be supplied by VRTC

• Bench foam – one (1) set to be supplied by VRTC

• Cloth bench foam coverings – one (1) set to be supplied by VRTC

• The fixture will be set at a 10 degree fixed angle CCW from longitudinal (Figure 2).

• Camera mounts and layouts will be specified. See sample drawing schematic Brelin-

Fornari, J., & Janca, S. (2014, May), Appendix B, High-Speed Video and Photography1. Positions will be determined prior to the baseline validation test series.

1 Brelin-Fornari, J., & Janca, S. (2014, May). Development of NHTSA’s side impact test procedure for child restraint systems using a deceleration sled: final report, part 2 (Report No. DOT HS 811 995). Washington, DC:

National Highway Traffic Safety Administration.

[http://www.nhtsa.gov/DOT/NHTSA/NVS/Crashworthiness/Child Safety Crashworthiness Research/811995-SideImpctTest-ChRestraintDecelSled_Pt2.pdf]