Document ID: chunk:federal_register_of_legislation:F2005L03990:reg:60:p5
Version: federal_register_of_legislation:F2005L03990
Segment Type: reg
Provision Reference: reg 60 (pt 5/9)
Character Range: 79494–82075

both strips to correspond with those in the mounting flange on the barrier (see paragraph 4). None of the fixtures shall fail in the impact test.

Figure 1
Deformable barrier for frontal impact testing
Barrier width = 1000 mm.
All dimensions in mm.

Figure 2
Locations of samples for certification

Figure 3
Honeycomb axes and measured dimensions

Figure 4
Crush force and displacement

Figure 5
Positions of holes for barrier mounting
Hole diameters 9,5 mm.
All dimensions in mm.

Annex 10

CERTIFICATION PROCEDURE FOR THE DUMMY LOWER LEG AND FOOT

1.  TIBIA IMPACT TEST
1.1.  The objective of this test is to measure the response of Hybrid III tibia skin and insert to well-defined, hard-faced pendulum impacts.
1.2.  Left and right Hybrid III leg assemblies, from the knee clevis joint down, shall be used. Each shall be attached rigidly to the test fixture.
1.3.  Test procedure
1.3.1.  Each leg assembly shall be maintained (soaked) for 4 hours prior to the test at a temperature of 22  3°C and a relative humidity of 40  30 per cent. The soak period shall not include the time required to reach steady state conditions.
1.3.2.  Align the impactor accelerometer with its sensitive axis parallel to the impactor longitudinal centre line.
1.3.3.  Clean the impact surface of the skin and also the impactor face with isopropyl alcohol or equivalent prior to the test.
1.3.4.  Mount the leg assembly to the fixture at the knee clevis joint, as shown in Figure 1. The test fixture shall be rigidly secured to prevent movement during impact. The test fixture shall be constructed such that there is no contact with any part of the leg assembly, other than at the fixing point, during the test. The line between the knee clevis joint and the centre of the ankle joint shall be vertical  5°. Adjust the knee and ankle joint to 1,5  0,5 g range before each test.
1.3.5.  The rigid impactor shall have a mass of 5,0  0,2 kg including instrumentation. The impact face shall be a half cylinder with its principal axis horizontal  1° and perpendicular to the direction of impact. The radius of the impact surface shall be 40  2 mm and the width of the impact surface shall be at least 80 mm. The impactor shall strike the tibia at a point midway between the knee clevis joint and the ankle pivot along the centre line of the tibia. The impactor shall strike the tibia so that the horizontal centre line of the impactor falls within 0,5° of a horizontal line parallel to the femur load cell simulator at time-zero. The impactor shall be guided to exclude significant lateral, vertical