FORD FLTM EU BN 017-1-2001 DETERMINATION OF THE CHANGE IN TENSILE STRENGTH OF SEWING THREADS AND SEAT BELTS AFTER AGEING.pdf

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1、FORD LABORATORY TEST METHOD EU BN 017-01 Date 2001 O9 10 1994 02 28 DETERMINATION OF THE CHANGE IN TENSILE STRENGTH OF SEWING THREADS AND SEAT BELTS AFTER AGEING Action Revisions Revised Editorial - no technical change A. Cockman Application This test method is used to determine the effect of ultra-

2、violet radiation on the tensile strength of sewing threads and seat belt webbings after Fadeometer exposure. Apparatus Required Fadeometer According to FLTM EU-BN 001-01. Tensile Testing Machine Constant rate of extension type, e.g., Model D Tensometer. Source: Tensometer Ltd. Croydon, Surrey, Engla

3、nd Split Drum Grips For seat belt testing (e.9. as denoted in SAE Standard J4C, para 7.2). Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 OC and 50 +/- 5 % relative humidity for not less than 24 h prior to te

4、sting and tested under the same conditions unless otherwise specified. Procedure Method A - Thread Samples 1. Prepare and expose the samples in the Fadeometer for 200 S.F.H. (if not otherwise specified) under the operating conditions described in FLTM EU-BN 001-01, Supplement 1. 2. Prior to performi

5、ng the tensile tests (original and aged) ensure that the specimens have been conditioned at 20 +/- 2 OC and a relative humidity of 65 +/- 3 % for 24 hours. Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD EU BN 017-01 3. Determine the tensile strength of ten threads in the or

6、iginal and ten threads in the aged condition as described in ASTM D 204. Evaluation Determine the average tensile strength for the original and aged specimens and calculate the percentage loss in tensile strength as follows: % loss in tensile strength = Oriainal Tensile - Aaed Tensile x 100 Original

7、 Tensile Method B - Seat Belts 1. Cut 2 specimens, each 1 O00 mm long from 3 seat belt assemblies. 2. Take one specimen from each seat belt assembly and fold the webbing so that a 300 mm strip is exposed in the centre of the specimen (see sketch). 3. Clamp each of the folded ends of the webbing to t

8、he revolving frame of the Fadeometer so that the webbing is held in a vertical position. 4. Expose the samples in the Fadeometer for 200 S.F.H. (if not otherwise specified) under the operating conditions described in FLTM EU-BN 001-01. 5. Prior to performing the tensile tests (original and aged) ens

9、ure that the specimens have been conditioned at 20 +/- 2 OC and a relative humidity of 65 +/- 3 % for 24 hours. 6. Determine the tensile strength of the 3 specimens in the original condition and the 3 specimens in the aged condition, as required by the relevant material specification. Evaluation Cal

10、culate the percentage Retained Tensile Strength for the seat belt assemblies, using the medium values obtained for the original and aged specimens, as follows: % Retained Tensile Strength = Aaed Tensile Strenath x 100 Original Tensile Strength Chemicals, materials, parts, and equipment referenced in

11、 this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. Page 2 of 3 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD EU BN 017-01 DETERMINATION OF THE CHANGE IN TENSILE STRENGTH OF SEWING THREADS AND SEAT BELTS AFTER AGEING CLIP BOT “ ENDS L 4 Page 3 of 3 Copynght02001, Ford Global Technologies, Inc