49 C.F.R. Subpart M—Side Impact Hybrid Dummy 50th Percentile Male
Title 49 - Transportation
Source: 63 FR 41470, Aug. 4, 1998, unless otherwise noted.
(a) The following materials are hereby incorporated by reference in Subpart M: (1) The Anthropomorphic Test Dummy Parts List, SID/Hybrid III part 572, subpart M, dated May 10, 1997. (2) The SID/Hybrid III Part 572 Subpart M User's Manual, dated May 1997. (3) Drawing number 96–SIDH3–001, titled, “Head-Neck Bracket,” dated August 30, 1996. (4) Drawing number 96–SIDH3–006, titled, “Upper and Middle Shoulder Foam,” dated May 10, 1997. (5) Drawing number SA-SIDH3-M001, titled, “Complete Assembly SIDH3,” dated April 19, 1997. (6) Drawing number 78051–61X, Revision C, titled “Head Assembly—complete,” dated March 28, 1997 (7) Drawing number 78051–90, Revision A, titled “Neck Assembly—complete,” dated May 20, 1978. (8) Dummy assembly drawing number SA-SID-M030, Revision A, titled “Thorax Assembly—complete,” dated May 18, 1994. (9) Dummy assembly drawing SA-SID-M050, revision A, titled “Lumbar Spine Assembly,” dated May 18, 1994. (10) Dummy assembly drawing SA–150 M060, revision A, titled “Pelvis and Abdomen Assembly,” dated May 18, 1994. (11) Dummy assembly drawing SA-SID-053, revision A, titled “Lumbar Spine Assembly,” dated May 18, 1994. (12) Dummy assembly drawing SA-SID-M080, titled “Leg Assembly, Right,” dated August 13, 1987. (13) Dummy assembly drawing SA-SID-M081, titled “Leg Assembly, Left,” dated August 13, 1987. (14) Drawing number 78051–383X, Revision P, titled “Neck Transducer Structural Replacement,” dated November 1, 1995. (15) The Society of Automotive Engineers (SAE) J1733 Information Report, titled “Sign Convention for Vehicle Crash Testing,” dated December 1994. (16) SAE Recommended Practice J211, “Instrumentation for Impact Tests,” Parts 1 and 2, dated March 1995. (b) The incorporated materials are available as follows: (1) The Director of the Federal Register approved those materials incorporated by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies of the materials may be inspected at NHTSA's Docket Section, 400 Seventh Street S.W., room 5109, Washington, DC, or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202–741–6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. (2) The parts lists, user's manual and drawings referred to in paragraphs (a)(1) through (a)(14) of this section are available from Reprographic Technologies, 9000 Virginia Manor Road, Beltsville, MD 20705 (301) 419–5070. (3) The SAE materials referred to in paragraphs (a)(15) and (a)(16) of this section are available from the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096. (a) The dummy consists of component parts and component assemblies defined in drawing SA-SIDH3-M001, dated April 19, 1997, which are described in approximately 200 drawings and specifications that are set forth in §§572.32, 572.33 and 572.41(a)(3),(4),(5) and (6) of this part, and in the drawing of the Adaptor Bracket 96–SIDH3–001. (1) The head assembly consists of the assembly specified in subpart E (§572.32) and conforms to each of the drawings subtended under drawing 78051–61X rev. C. (2) The neck assembly consists of the assembly specified in subpart E (§572.33) and conforms to each of the drawings subtended under drawing 78051–90 rev. A. (3) The thorax assembly consists of the assembly shown as number SID 053 and conforms to each applicable drawing subtended by number SA-SID M030 rev. A. (4) The lumbar spine consists of the assembly specified in subpart B (§572.9(a)) and conforms to drawing SA 150 M050 and drawings subtended by SA-SID M050 rev. A. (5) The abdomen and pelvis consist of the assembly and conform to the drawings subtended by SA 150 M060, the drawings subtended by SA 150 M060 rev. A and the drawings subtended by SA-SID-087 sheet 1 rev. H, and SA-SID-87 sheet 2 rev. H. (6) The lower limbs consist of the assemblies specified in Subpart B (§572.10) shown as SA 150 M080 and SA 150 M081 in Figure 1 and SA-SID-M080 and SA-SID-M081 and conform to the drawings subtended by those numbers. (7) The neck mounting adaptor bracket conforms to drawing 96–SIDH3–001. (8) Upper and middle shoulder foams conform to drawing 96–SIDH3–006. (b) The structural properties of the dummy are such that the dummy conforms to the specifications of this subpart in every respect before being used in vehicle tests specified in Standard 201. (c) Disassembly, inspection and assembly procedures, external dimensions, weight and drawing list are set forth in the SIDH3 User's Manual, dated May 1997. (d) Sign convention for signal outputs is given in the reference document SAE J1733 of 1994–12, “Sign Convention for Vehicle Crash Testing.” The head assembly consists of the head (drawing 78051–61X, rev. C) with the neck transducer structural replacement (drawing 78051–383X, rev. P) and three (3) accelerometers that are mounted in conformance to §572.36 (c). (a) Test procedure. (1) Soak the head assembly in a test environment at any temperature between 18.9 and 25.6 degrees C. (66 to 78 degrees F.) and at a relative humidity between 10 percent and 70 percent for a period of at least four (4) hours prior to its application in a test. (2) Clean the impact surface of the head skin and impact plate surface, described in paragraph (a)(4) of this section, with 1,1,1 trichloroethane or equivalent prior to the test. (3) Suspend the head, as shown in Figure 51, so that the midsagittal plane makes an angle of 35 ±1 degrees with the impact surface and its anterior-posterior axis is horizontal ±1 degree. (4) Drop the head from a height of 200 ±0.25 mm (7.87 ±0.01 inches), measured from the lowest point on the head, by a means that ensures a smooth, clean release into a rigidly supported flat horizontal steel plate, which is 51 ±2 mm (2.0 ±0.01 in.) thick and 610 ±10 mm (24.0 ±0.4 in) square. The plate shall have a dry surface and shall have a microfinish of 0.2 microns (8 microinches) to 2.0 microns (80 microinches). (5) Allow at least two (2) hours between successive tests on the same head. (b) Performance criteria. (1) When the head assembly is dropped in accordance with §572.112(a), the measured peak resultant acceleration shall be between 120 and 150 G's. (2) The resultant acceleration-time curve shall be unimodal to the extent that oscillations occurring after the main acceleration pulse shall not exceed 15 percent (zero to peak) of the main pulse. The longitudinal acceleration vector shall not exceed 15 G's. The head/neck assembly consists of the parts 78051–61X, rev. C; –84; –90, rev. A; –94; –98; –104, revision F; –303, rev. E;—305; –306; –307, rev. X and has a six axis neck transducer (drawing C–1709, revision D) installed in conformance with §572.36(d). (a) Test procedure. (1) Soak the head and neck assembly in a test environment at any temperature between 20.6 and 22.2 degrees C. (69 to 72 degrees F.) and at any relative humidity between 10 percent and 70 percent for a period of at least four (4) hours prior to its application in a test. (2) Torque the jamnut (78051–64) on the neck cable (78051–301, rev. E) to 1.35 ±0.27 Nm (1.0 ±0.2 ft-lb) before each test. (3) Using neck brackets 78051–303 and –307, mount the head/neck assembly to the part 572 pendulum test fixture (see §572.33, Figure 22,) so that the midsagittal plane of the head is vertical and perpendicular to the plane of motion of the pendulum's longitudinal centerline (see §572.33, Figure 20, except that the direction of the head/neck assembly is rotated around the superior-inferior axis by an angle of 90 degrees). Install suitable transducers or other devices necessary for measuring the “D” plane (horizontal surface at the base of the skull) rotation with respect to the pendulum's longitudinal centerline. The rotation can be measured by placing a transducer at the occipital condyles and another at the intersection of the centerline of the neck and the line extending from the base of the neck as shown in figure 52. (4) Release the pendulum and allow it to fall freely from a height to achieve an impact velocity of 6.89 to 7.13 m/s (22.6 to 23.4 ft/sec) measured at the center of the pendulum accelerometer. (5) Allow the neck to flex without the head or neck contacting any object during the test. (6) Time zero is defined as the time of initial contact between the striker plate and the pendulum deceleration medium. (7) Allow a period of at least thirty (30) minutes between successive tests on the same neck assembly. (b) Performance criteria. (1) The pendulum deceleration pulse is to be characterized in terms of decrease in velocity as obtained by integrating the pendulum acceleration output. (2) The maximum rotation of the midsagittal plane of the head shall be 66 to 82 degrees with respect to the pendulum's longitudinal centerline. The decaying head rotation vs. time curve shall cross the zero angle between 58 to 67 ms after reaching its peak value. (3) The moment about the x-axis which coincides with the midsagittal plane of the head at the level of the occipital condyles shall have a maximum value between 73 and 88 Nm. The decaying moment vs. time curve shall first cross zero moment between 49 and 64 ms after reaching its peak value. The following formula is to be used to calculate the moment about the occipital condyles when using the six-axis neck transducer: M = Mx + 0.01778 Fy
Where Mx and Fy are the moment and force measured by the transducer and expressed in terms of Nm and N, respectively. (4) The maximum rotation of the head with respect to the pendulum's longitudinal centerline shall occur between 2 and 16 ms after peak moment. [63 FR 41470, Aug. 4, 1998, as amended at 66 FR 51882, Oct. 11, 2001] The specifications and test procedure for the thorax for the SID/HIII dummy are identical to those applicable to the SID dummy as set forth in §572.42 except that the reference to the SID device found in §572.42(a), (SA-SID-M001A revision A, dated May 18, 1994) does not apply and the reference to the SID/HIII (SA-SIDH3-M001, dated April 19, 1997) is applied in its place. The specifications and test procedure for the lumbar spine and pelvis are identical to those for the SID dummy as set forth in §572.42 except that the reference to the SID device found in §572.42(a), (SA-SID-M001A revision A, dated May 18, 1994) does not apply and the reference to the SID/HIII (SA-SIDH3-M001, dated April 19, 1997) is applied in its place. (a) The test probe for lateral thoracic and pelvis impact tests are the same as those specified in §572.44(a). (b) Accelerometer mounting in the thorax is the same as specified in §572.44(b). (c) Accelerometer mounting in the pelvis is the same as specified in §572.44(c). (d) Head accelerometer mounting is the same as specified in §572.36(c). (e) Neck transducer mounting is the same as specified in §572.36(d). (f) Instrumentation and sensors used must conform to SAE Recommended Practice J211, March 1995, “Instrumentation for Impact Tests.” (g) The mountings for the spine, rib and pelvis accelerometers shall have no resonance frequency within a range of 3 times the frequency range of the applicable channel class. (h) Limb joints of the test dummy shall be set at the force between 1 to 2 g's, which just supports the limb's weight when the limbs are extended horizontally forward. The force required to move a limb segment does not exceed 2 g's throughout the range of the limb motion. (i) Performance tests must be conducted at a temperature between 20.6 and 22.2 degrees C. (69 to 72 degrees F.) and at a relative humidity between 10 percent and 70 percent after exposure of the dummy to those conditions for a period of at least four (4) hours. (j) For the performance of tests specified in §572.114 and §572.115, the dummy is positioned the same as specified in §572.44(h).
Title 49: Transportation
PART 572—ANTHROPOMORPHIC TEST DEVICES
Subpart M—Side Impact Hybrid Dummy 50th Percentile Male
§ 572.110 Materials incorporated by reference.
§ 572.111 General description.
§ 572.112 Head assembly.
§ 572.113 Neck assembly.
------------------------------------------------------------------------ Time (ms) Pendulum Delta-V (m/s)------------------------------------------------------------------------10..................................... 1.96 to 2.55.20..................................... 4.12 to 5.10.30..................................... 5.73 to 7.01.40 to 70............................... 6.27 to 7.64.------------------------------------------------------------------------
§ 572.114 Thorax.
§ 572.115 Lumbar spine and pelvis.
§ 572.116 Instrumentation and test conditions.
