1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2010 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 1+ 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/j2878_201001SURFACE VEHICLE RECOMMENDED PRACTICE J2878 JAN2010 Issued 2010-01 Low Speed Thora
5、x Impact Test Procedure for the HIII5F Dummy RATIONALE Not applicable. TABLE OF CONTENTS 1. SCOPE AND PURPOSE 1 2. REFERENCES 2 2.1 Applicable Publications . 2 2.1.1 SAE Publications . 2 2.2 Related Publication . 2 2.2.1 Federal Publication . 2 3. CERTIFICATION PROCEDURE 2 3.1 Preparation 2 3.2 Test
6、 Procedure 2 3.3 Performance Specifications 3 4. NOTES 5 4.1 Marginal Indicia . 5 FIGURE 1 TEST SET-UP SPECIFICATIONS 4 FIGURE 2 HYSTERESIS DEFINITION 5 1. SCOPE AND PURPOSE This procedure establishes a recommended practice for performing a Low Speed Thorax Impact Test to the Hybrid III Small Female
7、 Anthropomorphic Test Device (ATD or crash dummy). This test was created to satisfy the demand by the industry to have a certification test which results in peak chest deflection similar to current full vehicle, frontal impact tests. An inherent problem exists with the current certification procedur
8、e because the normal (6.7 m/s) thorax impact test has test results for peak chest deflection that are greater than those currently seen in full vehicle, frontal tests The intent of this document is to develop a low speed thorax certification procedure for the H-III5F dummy with a 3.0 m/s impact simi
9、lar to the SAE J2779 procedure for the H-III50M dummy. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J2878 Issued JAN2010 Page 2 of 5 2. REFERENCES 2.1 Applicable Publications The following publications form a part of this specification to the
10、extent specified herein. Unless otherwise indicated, the latest version of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. S
11、AE EA-25 Users Manual for the Small Adult Female Hybrid III Test Dummy SAE J211/1 Instrumentation for Impact TestPart 1Electronic Instrumentation SAE J2517 Hybrid III Family Chest Potentiometer Calibration Procedure SAE J2779 Low Speed Thorax Impact Test Procedure for the HIII 50thMale Dummy 2.2 Rel
12、ated Publication The following publication is provided for information purposes and is not a required part of this document. 2.2.1 Federal Publication Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-625
13、7, http:/assist.daps.dla.mil/quicksearch/. Motor Vehicle Regulation No. 572 Test Dummies SpecificationsAnthropomorphic Test Dummy for Applicable Test Procedures 3. CERTIFICATION PROCEDURE 3.1 Preparation a. The complete dummy assembly (880105-000) is required, including the clothing (t-shirt and pan
14、ts), but without the shoes (880105-630). b. The fixture consists of a smooth, clean, dry, steel seating surface and a test probe. The test probe is a 152.4 0.25 mm (6.0 0.01 in) diameter rigid cylinder with a mass of 13.97 0.023 kg (30.80 0.05 lb), including instrumentation, rigid attachments, and t
15、he lower 1/3 of the suspension cable mass. The impacting surface has a flat, right angle face with an edge radius of 12.7 0.3 mm (0.5 0.01 in). Mount an accelerometer to the probe with its sensitive axis in line with the longitudinal centerline of the test probe. c. The data acquisition system, incl
16、uding transducers, must conform to the specifications of the latest revision of SAE Recommended Practice J211/1. Filter pendulum force using a Channel Class 180 phaseless filter and chest deflection using a Channel Class 600 phaseless filter. Calibrate the chest deflection transducer using SAE J2517
17、 Revision September 2006 or later. 3.2 Test Procedure a. Remove the chest flesh and visually inspect the thorax assembly for cracks, cuts, abrasions, etc. Pay particular attention to the rib damping material (880105-358-1 through 880105-358-6), chest displacement transducer assembly (880105-1080), a
18、nd the rear rib supports (880105-320). Torque the spine cables to 1.13-1.36 Nm (10-12 in-lbf). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J2878 Issued JAN2010 Page 3 of 5 b. Soak the test dummy in a controlled environment with a temperature
19、of 20.6 to 22.2 C (69 to 72 F) and a relative humidity from 10 to 70 percent for at least four hours prior to the test, until the rib temperature has reached the soak temperature. The test environment should have the same temperature and humidity requirements as the soak environment. c. Check that a
20、ll transducers are properly installed, oriented, and calibrated. d. Seat the dummy (without the chest flesh but with the pants) on the test fixture surface. The surface must be long enough to support the pelvis and outstretched legs. e. Align the upper and lower neck bracket index marks to the zero
21、position. f. Place the arm assemblies horizontal ( 2) and parallel to the midsagittal plane. Secure the arms by tightening the adjustment nut which holds the arm yoke to the clavicle assembly (880105-336, 337). If necessary, prop the arms up with a rod that will fall away during the test. Level the
22、ribs both longitudinally and laterally 0.5 (the reference is the number 3 rib as shown in Figure 1) and adjust the pelvis angle to 7 2. (Use the special tool which inserts into the pelvic structure and extends outward beyond the pelvic skin surface. The tool permits the use of an angle measurement d
23、evice to determine the pelvis angle.) The midsagittal plane of the dummy is vertical 1 and within 2 of being parallel to the centerline of the test probe. The longitudinal centerline of the test probe is centered on the midsagittal plane of the dummy within 3 mm. Align the test probe so its longitud
24、inal centerline is 12.7 1 mm below the horizontal centerline of the No. 3 rib and is within 0.5 of a horizontal line in the dummys midsagittal plane. After completing the initial setup, record reference measurements from locations such as the rear surfaces of the thoracic spine and the lower neck br
25、acket. These reference measurements are necessary to ensure that the dummy remains in the same position after installing the chest flesh. When using a cable-supported test probe, the dummy must be moved rearward from the test probe to account for the thickness of the chest flesh, so the probe will i
26、mpact at the lowest point on its arc of travel. The test setup appears in Figure 1. g. Install the chest flesh and shirt and reposition the dummy as described in the preceding paragraph using the recorded reference measurements. The reference locations must be accessible after installation of the ch
27、est flesh, so it may be necessary to leave the chest flesh unzipped until the references are checked, and then fasten it just prior to the test. h. Impact the thorax with the test probe so the probes longitudinal centerline is within 2 of a horizontal line in the dummys midsagittal plane at the mome
28、nt of impact. Guide the probe so no significant lateral, vertical or rotational motion takes place during the impact. The test probe velocity at the time of impact is 3.00 m/s 0.05 m/s. Time-zero is defined as the time of initial contact between the test probe and the chest flesh. All data channels
29、should be at the zero level at this time (after processing to Engineering Units). Wait at least 30 minutes between successive tests on the same thorax. 3.3 Performance Specifications The maximum sternum-to-spine deflection, as measured by the chest displacement transducer should lie between -21.8 an
30、d -17.4 mm. The maximum force applied to the thorax by the test probe should measure between -2.07 and -1.78 kN. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J2878 Issued JAN2010 Page 4 of 5 The internal hysteresis ratio should be greater than
31、 65 percent but less than 72 percent. The hysteresis ratio, determined from the force vs. deflection curve, is the ratio of the area between the loading and unloading portions of the curve to the area under the loading portion of the curve. See Figure 2 for details. FIGURE 1 - TEST SET-UP SPECIFICAT
32、IONS 13.97 0.023 kg (30.80 0.05 lb) 0.5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J2878 Issued JAN2010 Page 5 of 5 FIGURE 2 - HYSTERESIS DEFINITION 4. NOTES 4.1 Marginal Indicia A change bar (I) located in the left margin is for the conveni
33、ence of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE DUMMY TESTING EQUIPMENT COMMITTEE Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
