Document ID: chunk:federal_register_of_legislation:F2005L03990:front:0:p11
Version: federal_register_of_legislation:F2005L03990
Segment Type: other
Provision Reference: 
Character Range: 27594–30282

paragraph 5.2.1.of annex 3 and is measured in units of gravity, g (1 g = 9,81 m/s2)
1.2.2.  if the beginning of the head contact can be determined satisfactorily, t1 and t2 are the two time instants, expressed in seconds, defining an interval between the beginning of the head contact and the end of the recording for which the value of HPC is maximum;
1.2.3.  if the beginning of the head contact cannot be determined, t1 and t2 are the two time instants, expressed in seconds, defining a time interval between the beginning and the end of the recording for which the value of HPC is maximum.
1.2.4. Values of HPC for which the time interval (t1 - t2) is greater than 36 ms are ignored for the purposes of calculating the maximum value.
1.3.  The value of the resultant head acceleration during forward impact which is exceeded for 3 ms cumulatively is calculated from the resultant head acceleration measured according to paragraph 5.2.1. of annex 3.
2.  NECK INJURY CRITERIA (NIC)
2.1.  These criteria are determined by the compressive axial force, the axial tensile force and the fore/aft shear forces at the head/neck interface, expressed in kN and measured according to paragraph 5.2.2. of annex 3 and by the duration of these forces expressed in ms.
2.2.  The neck bending moment criterion is determined by the bending moment, expressed in Nm, about a lateral axis at the head/neck interface and measured according to paragraph 5.2.2.of annex 3.
2.3.  The neck flexion bending moment, expressed in Nm, shall be recorded.
3.  THORAX COMPRESSION CRITERION (ThCC) AND VISCOUS CRITERION (V * C)
3.1.  The thorax compression criterion is determined by the absolute value of the thorax deformation, expressed in mm and measured according to paragraph 5.2.3. of annex 3.
3.2. The viscous criterion (V * C) is calculated as the instantaneous product of the compression and the rate of deflection of the sternum, measured according to paragraph 6 and also paragraph 5.2.3. of annex 3.
4.  FEMUR FORCE CRITERION (FFC)
4.1. This criterion is determined by the compression load expressed in kN, transmitted axially on each femur of the dummy and measured according to paragraph 5.2.4. of annex 3 and by the duration of the compressive load expressed in ms.
5.  TIBIA COMPRESSIVE FORCE CRITERION (TCFC) AND TIBIA INDEX (TI)
5.1.  The tibia compressive force criterion is determined by the compressive load (Fz) expressed in kN, transmitted axially on each tibia of the dummy and measured according to paragraph 5.2.4. of annex 3.
5.2.  The tibia index is calculated on the basis of the bending moments (Mx and My) measured according to paragraph 5.1. by the following expression:
 where:

 MX =