49 C.F.R. Subpart P—3-year-Old Child Crash Test Dummy, Alpha Version
Title 49 - Transportation
Source: 65 FR 15262, Mar. 22, 2000, unless otherwise noted.
(a) The following materials are hereby incorporated in this subpart P by reference: (1) A drawings and specifications package entitled, “Parts List and Drawings, Subpart P Hybrid III 3-year-old child crash test dummy, (H-III3C, Alpha version) September 2001,” incorporated by reference in §572.141 and consisting of: (i) Drawing No. 210–1000, Head Assembly, incorporated by reference in §§572.141, 572.142, 572.144, 572.145, and 572.146; (ii) Drawing No. 210–2001, Neck Assembly, incorporated by reference in §§572.141, 572.143, 572.144, 572.145, and 572.146; (iii) Drawing No. TE–208–000, Headform, incorporated by reference in §§572.141, and 572.143; (iv) Drawing No. 210–3000, Upper/Lower Torso Assembly, incorporated by reference in §§572.141, 572.144, 572.145, and 572.146; (v) Drawing No. 210–5000–1(L), –2(R), Leg Assembly, incorporated by reference in §§572.141, 572.144, 572.145 as part of a complete dummy assembly; (vi) Drawing No. 210–6000–1(L), –2(R), Arm Assembly, incorporated by reference in §§572.141, 572.144, and 572.145 as part of the complete dummy assembly; (2) A procedures manual entitled “Procedures for Assembly, Disassembly and Inspection (PADI), Subpart P, Hybird III 3-year-old Child Crash Test Dummy, (H-III3C, Alpha Version) September 2001,” incorporated by reference in §572.141; (3) SAE Recommended Practice J211/1, Rev. Mar 95 “Instrumentation for Impact Tests—Part 1-Electronic Instrumentation”, incorporated by reference in §572.146; (4) SAE J1733 1994–12 “Sign Convention for Vehicle Crash Testing” incorporated by reference in §572.146. (5) 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 SW, 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. (b) The incorporated materials are available as follows: (1) The drawings and specifications package referred to in paragraph (a)(1) of this section and the PADI document referred to in paragraph (a)(2) of this section are accessible for viewing and copying at the Department of Transportation's Docket public area, Plaza 401, 400 Seventh St., SW., Washington, DC 20590, and downloadable at dms.dot.gov. They are also available from Reprographic Technologies, 9107 Gaither Rd., Gaithersburg, MD 20877, (301) 419–5070. (2) The SAE materials referred to in paragraphs (a)(3) and (a)(4) of this section are available from the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096. [65 FR 15262, Mar. 22, 2000, as amended at 66 FR 64376, Dec. 13, 2001] (a) The Hybrid III 3-year-old child dummy is described by the following materials: (1) Technical drawings and specifications package 210–0000 (refer to §572.140(a)(1)), the titles of which are listed in Table A of this section; (2) Procedures for Assembly, Disassembly and Inspection document (PADI) (refer to §572.140(a)(2)). (b) The dummy is made up of the component assemblies set out in the following Table A of this section: (c) Adjacent segments are joined in a manner such that except for contacts existing under static conditions, there is no contact between metallic elements throughout the range of motion or under simulated crash impact conditions. (d) The structural properties of the dummy are such that the dummy conforms to this part in every respect only before use in any test similar to those specified in Standard 208, Occupant Crash Protection, and Standard 213, Child Restraint Systems. (a) The head assembly (refer to §572.140(a)(1)(i)) for this test consists of the head (drawing 210–1000), adapter plate (drawing ATD 6259), accelerometer mounting block (drawing SA 572–S80), structural replacement of (b) When the head assembly in paragraph (a) of this section is dropped from a height of 376.0±1.0 mm (14.8±0.04 in) in accordance with paragraph (c) of this section, the peak resultant acceleration at the location of the accelerometers at the head CG shall not be less than 250 g or more than 280 g. The resultant acceleration versus time history curve shall be unimodal, and the oscillations occurring after the main pulse shall be less than 10 percent of the peak resultant acceleration. The lateral acceleration shall not exceed ±15 G (zero to peak). (c) Head test procedure. The test procedure for the head is as follows: (1) Soak the head assembly in a controlled environment at any temperature between 18.9 and 25.6 °C (66 and 78 °F) and at any relative humidity between 10 and 70 percent for at least four hours prior to a test. (2) Prior to the test, clean the impact surface of the head skin and the steel impact plate surface with isopropyl alcohol, trichlorethane, or an equivalent. Both impact surfaces must be clean and dry for testing. (3) Suspend the head assembly with its midsagittal plane in vertical orientation as shown in Figure P1 of this subpart. The lowest point on the forehead is 376.0 ±1.0 mm (14.76 ±0.04 in) from the steel impact surface. The 3.3 mm (0.13 in) diameter holes, located on either side of the dummy's head in transverse alignment with the CG, shall be used to ensure that the head transverse plane is level with respect to the impact surface. (4) Drop the head assembly from the specified height by a means that ensures a smooth, instant release onto a rigidly supported flat horizontal steel plate which is 50.8 mm (2 in) thick and 610 mm (24 in) square. The impact surface shall be clean, dry and have a finish of not less than 203.2×10−6 mm (8 micro inches) (RMS) and not more than 2032.0×10−6 mm (80 micro inches) (RMS). (5) Allow at least 2 hours between successive tests on the same head. (a) The neck and headform assembly (refer to §§572.140(a)(1)(ii) and 572.140(a)(1)(iii)) for the purposes of this test, as shown in Figures P2 and P3 of this subpart, consists of the neck molded assembly (drawing 210–2015), neck cable (drawing 210–2040), nylon shoulder bushing (drawing 9001373), upper mount plate insert (drawing 910420–048), bib simulator (drawing TE–208–050), urethane washer (drawing 210–2050), neck mounting plate (drawing TE–250–021), two jam nuts (drawing 9001336), load-moment transducer (drawing SA 572–S19), and headform (drawing TE–208–000). (b) When the neck and headform assembly, as defined in §572.143(a), is tested according to the test procedure in paragraph (c) of this section, it shall have the following characteristics: (1) Flexion. (i) Plane D, referenced in Figure P2 of this subpart, shall rotate in the direction of preimpact flight with respect to the pendulum's longitudinal centerline between 70 degrees and 82 degrees. Within this specified rotation corridor, the peak moment about the occipital condyle may not be less than 42 N-m and not more than 53 N-m. (ii) The positive moment shall decay for the first time to 10 N-m between 60 ms and 80 ms after time zero. (iii) The moment and rotation data channels are defined to be zero when the longitudinal centerline of the neck and pendulum are parallel. (2) Extension. (i) Plane D referenced in Figure P3 of this subpart shall rotate in the direction of preimpact flight with respect to the pendulum's longitudinal centerline between 83 degrees and 93 degrees. Within this specified rotation corridor, the peak moment about the occipital condyle may be not more than −43.7 N-m and not less than −53.3 N-m. (ii) The negative moment shall decay for the first time to −10 N-m between 60 and 80 ms after time zero. (iii) The moment and rotation data channels are defined to be zero when the longitudinal centerline of the neck and pendulum are parallel. (c) Test procedure. (1) Soak the neck assembly in a controlled environment at any temperature between 20.6 and 22.2 °C (69 and 72 F) and a relative humidity between 10 and 70 percent for at least four hours prior to a test. (2) Torque the jam nut (drawing 9001336) on the neck cable (drawing 210–2040) between 0.2 N-m and 0.3 N-m. (3) Mount the neck-headform assembly, defined in paragraph (a) of this section, on the pendulum so the midsagittal plane of the headform is vertical and coincides with the plane of motion of the pendulum as shown in Figure P2 of this subpart for flexion and Figure P3 of this subpart for extension tests. (4) Release the pendulum and allow it to fall freely to achieve an impact velocity of 5.50 ±0.10 m/s (18.05 + 0.40 ft/s) for flexion and 3.65 ±0.1 m/s (11.98 ±0.40 ft/s) for extension tests, measured by an accelerometer mounted on the pendulum as shown in Figure 22 of this part 572 at time zero. (i) The test shall be conducted without inducing any torsion twisting of the neck. (ii) Stop the pendulum from the initial velocity with an acceleration vs. time pulse which meets the velocity change as specified in Table B of this section. Integrate the pendulum acceleration data channel to obtain the velocity vs. time curve as indicated in Table B of this section. (iii) Time-zero is defined as the time of initial contact between the pendulum striker plate and the honeycomb material. The pendulum data channel shall be zero at this time. (a) Thorax (upper torso) assembly (refer to §572.140(a)(1)(iv)). The thorax consists of the upper part of the torso assembly shown in drawing 210–3000. (b) When the anterior surface of the thorax of a completely assembled dummy (drawing 210–0000) is impacted by a test probe conforming to §572.146(a) at 6.0 ±0.1 m/s (19.7 ±0.3 ft/s) according to the test procedure in paragraph (c) of this section. (1) Maximum sternum displacement (compression) relative to the spine, measured with the chest deflection transducer (SA–572–S50), must not be less than 32mm (1.3 in) and not more than 38mm (1.5 in). Within this specified compression corridor, the peak force, measured by the probe-mounted accelerometer as defined in §572.146(a) and calculated in accordance with paragraph (b)(3) of this section, shall be not less than 680 N and not more than 810 N. The peak force after 12.5 mm of sternum compression but before reaching the minimum required 32.0 mm sternum compression shall not exceed 910 N. (2) The internal hysteresis of the ribcage in each impact, as determined from the force vs. deflection curve, shall be not less than 65 percent and not more than 85 percent. The hysteresis shall be calculated by determining the ratio of the area between the loading and unloading portions of the force deflection curve to the area under the loading portion of the curve. (3) The force shall be calculated by the product of the impactor mass and its deceleration. (c) Test procedure. The test procedure for the thorax assembly is as follows: (1) The test dummy is clothed in cotton-polyester-based tight-fitting shirt with long sleeves and ankle-length pants whose combined weight is not more than 0.25 kg (0.55 lbs). (2) Soak the dummy in a controlled environment at any temperature between 20.6 and 22.2 °C (69 and 72 °F) and at any relative humidity between 10 and 70 percent for at least four hours prior to a test. (3) Seat and orient the dummy on a seating surface without back support as shown in Figure P4, with the lower limbs extended horizontally and forward, the upper arms parallel to the torso and the lower arms extended horizontally and forward, parallel to the midsagittal plane, the midsagittal plane being vertical within ±1 degree and the ribs level in the anterior-posterior and lateral directions within ±0.5 degrees. (4) Establish the impact point at the chest midsagittal plane so that the impact point of the longitudinal centerline of the probe coincides with the dummy's mid-sagittal plane and is centered on the center of No. 2 rib within ±2.5 mm (0.1 in.) and 0.5 degrees of a horizontal plane. (5) Impact the thorax with the test probe so that at the moment of contact the probe's longitudinal center line is within 2 degrees of a horizontal line in the dummy's midsagittal plane. (6) Guide the test probe during impact so that there is no significant lateral, vertical or rotational movement. (7) No suspension hardware, suspension cables, or any other attachments to the probe, including the velocity vane, shall make contact with the dummy during the test. [65 FR 15262, Mar. 22, 2000, as amended at 66 FR 64376, Dec. 13, 2001] (a) The test objective is to determine the resistance of the lumbar spine and abdomen of a fully assembled dummy (drawing 210–0000) to flexion articulation between upper and lower halves of the torso assembly (refer to §572.140(a)(1)(iv)). (b)(1) When the upper half of the torso assembly of a seated dummy is subjected to a force continuously applied at the occipital condyle level through the rigidly attached adaptor bracket in accordance with the test procedure set out in paragraph (c) of this section, the lumbar spine-abdomen assembly shall flex by an amount that permits the upper half of the torso, as measured at the posterior surface of the torso reference plane shown in Figure P5 of this subpart, to translate in angular motion in the midsagittal plane 45 ±0.5 degrees relative to the vertical transverse plane, at which time the pulling force applied must not be less than 130 N (28.8 lbf) and not more than 180 N (41.2 lbf), and (2) Upon removal of the force, the upper torso assembly returns to within 10 degrees of its initial position. (c) Test procedure. The test procedure is as follows: (1) Soak the dummy in a controlled environment at any temperature between 18.9° and 25.6 °C (66 and 78 °F) and at any relative humidity between 10 and 70 percent for at least 4 hours prior to a test. (2) Assemble the complete dummy (with or without the lower legs) and seat it on a rigid flat-surface table, as shown in Figure P5 of this subpart. (i) Unzip the torso jacket and remove the four (ii) Position the matching end of the rigid pelvis attachment fixture around the lumbar spine and align it over the four bolt holes. (iii) Secure the fixture to the dummy with the four (iv) Attach the loading adapter bracket to the upper part of the torso as shown in Figure P5 of this subpart and zip up the torso jacket. (v) Point the upper arms vertically downward and the lower arms forward. (3)(i) Flex the thorax forward three times from vertical until the torso reference plane reaches 30 ±2 degrees from vertical. The torso reference plane, as shown in figure P5 of this subpart, is defined by the transverse plane tangent to the posterior surface of the upper backplate of the spine box weldment (drawing 210–8020). (ii) Remove all externally applied flexion forces and support the upper torso half in a vertical orientation for 30 minutes to prevent it from drooping. (4) Remove the external support and after two minutes measure the initial orientation angle of the upper torso reference plane of the seated, unsupported dummy as shown in Figure P5 of this subpart. The initial orientation of the torso reference plane may not exceed 15 degrees. (5) Attach the pull cable at the point of load application on the adaptor bracket while maintaining the initial torso orientation. Apply a pulling force in the midsagittal plane, as shown in Figure P5 of this subpart, at any upper torso flexion rate between 0.5 and 1.5 degrees per second, until the torso reference plane reaches 45 ±0.5 degrees of flexion relative to the vertical transverse plane. (6) Continue to apply a force sufficient to maintain 45 ±0.5 degrees of flexion for 10 seconds, and record the highest applied force during the 10-second period. (7) [Reserved] (8) Release all force at the loading adaptor bracket as rapidly as possible and measure the return angle with respect to the initial angle reference plane as defined in paragraph (c)(4) of this section 3 to 4 minutes after the release. (a) The test probe for thoracic impacts, except for attachments, shall be of rigid metallic construction and concentric about its longitudinal axis. Any attachments to the impactor such as suspension hardware, and impact vanes, must meet the requirements of §572.144(c)(7) of this part. The impactor shall have a mass of 1.70 ±0.02 kg (3.75 ±0.05 lb) and a minimum mass moment of inertia 164 kg-cm2 (0.145 lb-in-sec2 ) in yaw and pitch about the CG of the probe. One-third ( (b) Head accelerometers shall have the dimensions, response characteristics, and sensitive mass locations specified in drawing SA 572–S4 and be mounted in the head as shown in drawing 210–0000. (c) The neck force-moment transducer shall have the dimensions, response characteristics, and sensitive axis locations specified in drawing SA 572–S19 and be mounted at the upper neck transducer location as shown in drawing 210–0000. A lower neck transducer as specified in drawing SA 572–S19 is allowed to be mounted as optional instrumentation in place of part No. ATD6204, as shown in drawing 210–0000. (d) The shoulder force transducers shall have the dimensions and response characteristics specified in drawing SA 572–S21 and be allowed to be mounted as optional instrumentation in place of part No. 210–3800 in the torso assembly as shown in drawing 210–0000. (e) The thorax accelerometers shall have the dimensions, response characteristics, and sensitive mass locations specified in drawing SA 572–S4 and be mounted in the torso assembly in triaxial configuration at the T4 location, as shown in drawing 210–0000. Triaxial accelerometers may be mounted as optional instrumentation at T1, and T12, and in uniaxial configuration on the sternum at the midpoint level of ribs No. 1 and No. 3 and on the spine coinciding with the midpoint level of No. 3 rib, as shown in drawing 210–0000. If used, the accelerometers must conform to SA–572–S4. (f) The chest deflection potentiometer shall have the dimensions and response characteristics specified in drawing SA–572–S50 and be mounted in the torso assembly as shown drawing 210–0000. (g) The lumbar spine force/moment transducer may be mounted in the torso assembly as shown in drawing 210–0000 as optional instrumentation in place of part No. 210–4150. If used, the transducer shall have the dimensions and response characteristics specified in drawing SA–572–S20. (h) The pubic force transducer may be mounted in the torso assembly as shown in drawing 210–0000 as optional instrumentation in place of part No. 921–0022–036. If used, the transducer shall have the dimensions and response characteristics specified in drawing SA–572–S18. (i) The acetabulum force transducers may be mounted in the torso assembly as shown in drawing 210–0000 as optional instrumentation in place of part No. 210–4522. If used, the transducer shall have the dimensions and response characteristics specified in drawing SA–572–S22. (j) The anterior-superior iliac spine transducers may be mounted in the torso assembly as shown in drawing 210–0000 as optional instrumentation in place of part No. 210–4540–1, –2. If used, the transducers shall have the dimensions and response characteristics specified in drawing SA–572–S17. (k) The pelvis accelerometers may be mounted in the pelvis in triaxial configuration as shown in drawing 210–0000 as optional instrumentation. If used, the accelerometers shall have the dimensions and response characteristics specified in drawing SA–572–S4. (l) The outputs of acceleration and force-sensing devices installed in the dummy and in the test apparatus specified by this part shall be recorded in individual data channels that conform to the requirements of SAE Recommended Practice J211/1, Rev. Mar 95 “Instrumentation for Impact Tests—Part 1-Electronic Instrumentation” (refer to §572.140(a)(3)), with channel classes as follows: (1) Head acceleration—Class 1000 (2) Neck (i) Force—Class 1000 (ii) Moments—Class 600 (iii) Pendulum acceleration—Class 180 (iv) Rotation potentiometer response (if used)—CFC 60. (3) Thorax: (i) Rib/sternum acceleration—Class 1000 (4) Lumbar: (i) Forces—Class 1000 (ii) Moments—Class 600 (iii) Torso flexion pulling force—Class 60 if data channel is used (5) Pelvis (i) Accelerations—Class 1000 (ii) Acetabulum, pubic symphysis—Class 1000, (iii) Iliac wing forces—Class 180 (m) Coordinate signs for instrumentation polarity shall conform to the Sign Convention For Vehicle Crash Testing, Surface Vehicle Information Report, SAE J1733, 1994–12 (refer to §572.140(a)(4)). (n) The mountings for sensing devices shall have no resonance frequency less than 3 times the frequency range of the applicable channel class. (o) Limb joints shall be set at lG, barely restraining the weight of the limbs when they are extended horizontally. The force required to move a limb segment shall not exceed 2G throughout the range of limb motion. (p) Performance tests of the same component, segment, assembly, or fully assembled dummy shall be separated in time by a period of not less than 30 minutes unless otherwise noted. (q) Surfaces of dummy components are not painted except as specified in this part or in drawings subtended by this part. [65 FR 15262, Mar. 22, 2000, as amended at 66 FR 64376, Dec. 13, 2001]
Title 49: Transportation
PART 572—ANTHROPOMORPHIC TEST DEVICES
Subpart P—3-year-Old Child Crash Test Dummy, Alpha Version
§ 572.140 Incorporation by reference.
§ 572.141 General description.
Table A------------------------------------------------------------------------ Component assembly Drawing No.------------------------------------------------------------------------Head Assembly............................ 210-1000Neck Assembly (complete)................. 210-2001Upper/Lower Torso Assembly............... 210-3000Leg Assembly............................. 210-5000-1(L), -2(R)Arm Assembly............................. 210-6000-1(L), -2(R)------------------------------------------------------------------------
§ 572.142 Head assembly and test procedure.
§ 572.143 Neck-headform assembly and test procedure.
Table B_Pendulum Pulse---------------------------------------------------------------------------------------------------------------- Time Flexion Time Extension---------------------------------------------------------------------------------------------------------------- ms m/s ft/s ms m/s ft/s----------------------------------------------------------------------------------------------------------------10............................................. 2.0-2.7 6.6-8.9 6 1.0-1.4 3.3-4.615............................................. 3.0-4.0 9.8-13.1 10 1.9-2.5 6.2-8.220............................................. 4.0-5.1 13.1-16.7 14 2.8-3.5 9.2-11.5----------------------------------------------------------------------------------------------------------------
§ 572.144 Thorax assembly and test procedure.
§ 572.145 Upper and lower torso assemblies and torso flexion test procedure.
§ 572.146 Test conditions and instrumentation.
Figures to Subpart P of Part 572
