1、 FORD LABORATORY TEST METHOD EU-BO 051-04 Date Action Revisions 2001 03 27 Revised Editorial no technical change A. Cockman 1994 02 28 Printed copies are uncontrolled Page 1 of 3 Copyright 2001, Ford Global Technologies, Inc. DETERMINATION OF IMPACT RESILIENCE Application This procedure is used to d
2、etermine the impact resilience of elastomers e.g., rubber and polyurethane. Apparatus Required Schob System Impact Pendulum (see drawing) With: Potential Energy of Pendulum 0.5 Nm +/- 0.01 Nm Impact Speed of Pendulum 2 m/sec + 0.3 m/sec - 0.04 m/sec Loss of Energy by Friction of 2 % maximum Pendulum
3、 Height of Impact Point of Pendulum 0 mm +/- 4 mm Above the Centre of the Specimen Source: W. Wykeham & Co. and Fa Zwick & Co. Aeon Laboratories 7901 Einsingen Englefield Green, Surrey, England Ulmer Weg 22, Germany Micrometer With +/- 0.05 mm accuracy. Cutting Die 36 +/- 0.1 mm diameter. Conditioni
4、ng and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. FORD LABORATORY TEST METHOD EU-
5、BO 051-04 Page 2 of 3 Copyright 2001, Ford Global Technologies, Inc. Procedure 1. Die cut 3 specimens from slab stock with a thickness of 6 +/- 1 mm. 2. Measure the thickness of the specimens, and note to the nearest 0.1 mm. 3. Mount the specimen on the anvil of the test apparatus, so that the hamme
6、r peen of the pendulum just touches the specimen when in the free perpendicular position. 4. Allow the pendulum to fall 6 times from the horizontal position onto the same point of the specimen. 5. Record the percent rebound resilience of the 4th, 5th and 6th stroke. Evaluation Calculate the average
7、of the results for the 4th, 5th and 6th strokes. Multiply the average obtained with the following correction factor. C.F. = 11 mm a + 5 mm Where: a = average thickness of the specimen. Note: If it is impossible to obtain the required specimen thickness (5 - 7 mm) do not use the above correction fact
8、or. In such instances the impact resilience must be reported together with the specimen thickness. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD EU-BO 051-04 Page 3 of 3 Copyright 2001, Ford Global Technologies, Inc. DETERMINATION OF IMPACT RESILIENCE Dimensions in mm A = Maximum Pointer D = Level B = Specimen E = Probe C = Backspace Button for F = Specimen Support Maximum Pointer
