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1、BRITISH STANDARD BS EN ISO 19956:2004 Footwear Test methods for heels Fatigue resistance The European Standard EN ISO 19956:2004 has the status of a British Standard ICS 61.060 ? BS EN ISO 19956:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committ
2、ee on 24 September 2004 BSI 24 September 2004 ISBN 0 580 44502 X National foreword This British Standard is the official English language version of EN ISO 19956:2004. It is identical with ISO 19956:2004. It supersedes BS 5131-4.9:1991 which is withdrawn. The UK participation in its preparation was
3、entrusted to Technical Committee TCI/69, Footwear and leather, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to
4、 in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions o
5、f a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or pro
6、posals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, pages 2 to 7 and a back cover. The BSI copyright notice
7、displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 19956 September 2004 ICS 61.060 English version Footwear - Test methods for heels - Fatigue resistance (ISO 19956
8、:2004) Chaussures - Mthodes dessai relatives aux talons - Rsistance la fatigue (ISO 19956:2004) Schuhe - Prfverfahren fr Abstze - Ermdungswiderstand (ISO 19956:2004) This European Standard was approved by CEN on 2 March 2004. CEN members are bound to comply with the CEN/CENELEC Internal Regulations
9、which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European
10、Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national
11、standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN
12、 COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 19956:2004: E EN ISO 19956:
13、2004 (E) 2 Contents page Foreword3 1 Scope 4 2 Terms and definitions .4 3 Apparatus and material.4 4 Sampling and conditioning.6 5 Test method6 6 Expression of results 7 7 Test report7 EN ISO 19956:2004 (E) 3 Foreword This document (EN ISO 19956:2004) has been prepared by Technical Committee CEN /TC
14、 309 “Footwear“, the secretariat of which is held by AENOR, in collaboration with Technical Committee ISO/TC 216 “Footwear“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2005, and conflic
15、ting national standards shall be withdrawn at the latest by March 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finlan
16、d, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 19956:2004 (E) 4 1 Scope This European Standard specifies a test method for determining
17、 the ability of heels of ladies shoes to withstand the repeated small impacts imposed by normal walking. Although intended primarily for plastics heels, the procedure is also usable for testing steel heel dowels on their own. NOTE While the test method is applicable to all types of high heels of any
18、 construction, it is particularly useful for injection- moulded plastics heels which incorporate a steel dowel reinforcement. The shape of some heels is such that they have a high fatigue resistance. It is usually considered unnecessary to test such heels for fatigue resistance. 2 Terms and definiti
19、ons For the purposes of this European Standard, the following term and definition apply. fatigue resistance resistance of a heel, under specified conditions, to repeated loading cycles. 3 Apparatus and material 3.1 The following apparatus and material shall be used: 3.2 Heel fatigue-testing apparatu
20、s, incorporating a motor-driven pendulum which can deliver blows to a test specimen assembly, each blow having an energy of 0,68 J, at the rate of one blow per second. The apparatus is clamped either on to a solid built-in bench, or on to a rigid free-standing frame anchored to the floor (see NOTE).
21、 An example of a suitable apparatus is shown in Figure 1. NOTE If the apparatus is not firmly mounted, there is a partial loss of energy on impact, thereby producing false results. The apparatus shall include the following: 3.2.1 Pendulum, consisting of a circular steel bob of diameter 57 mm 1 mm an
22、d thickness 20 mm 1 mm, which is fixed by a circular shaft of diameter 12,5 mm 1,0 mm to a hub on the bearing axle. The distance from the centre of the bob to the centre of the hub is 152 mm 2 mm. The moment of the pendulum when is held horizontally is 0,68 Nm 0,02 Nm. 3.2.2 Striker head, consisting
23、 of a strip of metal 6,0 mm 0,5 mm thick, 20 mm 1 mm wide and 35 mm 2 mm long with the striking edge rounded to a radius of 3,0 mm 0,5 mm. The head is fixed rigidly to the pendulum bob so that the striker tip and centre of the bob lie on the same circle of swing of the pendulum and are 63,5 mm 2 mm
24、apart. 3.2.3 Rebound damper, for the pendulum. 3.2.4 Base clamp, for holding the metal mounting tray (3.3) and for adjusting it vertically and horizontally to achieve correct alignment of the heel tip. 3.2.5 Counter, for recording the number of blows. 3.2.6 Overshoot cut-out device, which operates w
25、hen the pendulum overshoots a broken heel stem at complete failure. EN ISO 19956:2004 (E) 5 Key 1 Pendulum 2 Pendulum bob 3 Striker head 4 Hub 5 Power supply switch 6 Counter 7 Test specimen assembly 8 Vertical locking plate 9 Sighting plate for aligning the heel 10 Base clamp for rotation orientati
26、on 11 Clamp for vertical orientation 12 Device for locking 10 and 11 against 8 13 Horizontal locking device 14 Rebound damper, for the pendulum Figure 1 Heel fatigue-testing apparatus 3.3 Metal mounting trays. An example of a suitable apparatus is shown in Figure 2. Each to contain a heel set in low
27、 melting point metal alloy (3.4). EN ISO 19956:2004 (E) 6 Figure 2 Metal mounting tray with heel in position before addition of molten metal alloy 3.4 Metal alloy, melting point between 100 C and 150 C. 4 Sampling and conditioning 4.1 Take three heels and set each heel in a dry metal mounting tray (
28、3.3), using the procedure described in 4.2, to obtain a test specimen assembly. 4.2 Place the heel centrally in the tray so that the seat breast edge is against a flat end of the tray and heel tip points upwards (see Figure 2). Heat the metal alloy (3.4) until it is at the lowest temperature at whic
29、h it will flow into all parts of the tray. Pour it into the tray filling the space around the heel to within 3 mm from the top of the tray. Allow the metal alloy to cool and set, thereby providing a rigid mounting for the heel. 5 Test method 5.1 Principle A heel is subjected to blows, each of specif
30、ied energy, delivered by a pendulum once a second. Testing continues until failure of the heel takes place, or until satisfactory fatigue resistance is obvious. 5.2 Procedure 5.2.1 With the pendulum in the rest position, insert the test specimen assembly in the inclined part of the base clamp (3.2.4
31、) of the heel fatigue-testing apparatus (3.2) with the back of the heel facing the pendulum. Set the test specimen assembly at suitable angle to the horizontal so that the blow will be applied approximately at right angles to the heel stem. Adjust the position of the test specimen assembly in the ba
32、se clamp until the striker (3.2.2) barely contacts the heel 6 mm below the heel tip. Set the counter (3.2.5) to “zero” (or note the riding), and start the machine ensuring that the overshoot cut-out device is activated. 5.2.2 At intervals of 60 min check weather any damage has developed that still a
33、llows the pendulum to continue in motion. If it has, record the number of blows shown by the machine counter and describe the type of damage. EN ISO 19956:2004 (E) 7 5.2.3 If damage develops and becomes so severe that the overshoot cut-out device stops the machine (termed “complete failure”), record
34、 the number of blows and describe the type of damage. 5.2.4 If a complete failure is not occurred after 20 000 blows (approximately 5 h 30 min) discontinue the test and describe any damage that has developed. 5.2.5 Damage involving fracture or cracking of the heel at the point of impact of the strik
35、er is regarded as invalid in this test, since it is due to the effect of the striker acting as a chisel rather than fracture of the heel due to impact at the heel as in wear. If such damage occurs, report it together with this explanation. 5.2.6 Repeat the test with the other two test specimen assem
36、blies by following the same procedure. 6 Expression of results Express the result for each test specimen assembly in one or more of the following ways, as appropriate: a) the number of blows at which damage was first detected, as described in 5.2.2; b) the number of blows at which complete failure o
37、ccurred, as described in 5.2.3; c) the fact that no complete failure occurred within 20 000 blows, as described in 5.2.4; d) the fact that damage involving fracture or cracking of the heel at the point of impact occurred, as described in 5.2.5. 7 Test report The test report shall include the followi
38、ng information: a) the result for each heel, expressed in accordance with clause 6; b) description of the damage or completely failure corresponding to test results expressed according to 6 a), 6 b), 6 c) and/or 6 d), as applicable; c) a full description of the samples tested, including commercial s
39、tyles codes, colours, nature, etc.; d) reference of this method of test; e) date of testing; f) any deviation from this test method. BS EN ISO 19956:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British
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