1、 IEC 61300-2-24 Edition 2.0 2010-04 INTERNATIONAL STANDARD Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-24: Tests Screen testing of ceramic alignment split sleeve by stress application IEC 61300-2-24:2010(E) colour inside THIS PUBLICATION IS
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9、02 11 Fax: +41 22 919 03 00 IEC 61300-2-24 Edition 2.0 2010-04 INTERNATIONAL STANDARD Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-24: Tests Screen testing of ceramic alignment split sleeve by stress application INTERNATIONAL ELECTROTECHNICA
10、L COMMISSION P ICS 33.180.20 PRICE CODE ISBN 978-2-88910-492-5 Registered trademark of the International Electrotechnical Commission colour inside 2 61300-2-24 IEC:2010(E) CONTENTS FOREWORD.3 1 Scope.5 2 General description 5 3 Apparatus.5 4 Procedure 7 5 Details to be specified 7 Annex A (informati
11、ve) Static fatigue for zirconia alignment sleeve8 Bibliography15 Figure 1 Apparatus used for screen testing of a ceramic alignment sleeve.6 Figure A.1 Model of time-varying proof stress for a zirconia sleeve10 Figure A.2 Calculated contour lines of gauge retention force and working stress along with
12、 inner and outer diameter of a zirconia sleeve .11 Figure A.3 Calculated general relationship between p / a and t e , satisfying 0,1 FIT for 20 years use12 Figure A.4 Calculated failure probability of screened zirconia sleeves along with working time .12 Figure A.5 Measured and calculated strength d
13、istribution of 2,5 mm zirconia sleeves (comparison between sleeves, extended proof tested or not) 13 Figure A.6 Measured strength distribution of 1,25 mm zirconia sleeves (comparison between sleeves, extended proof tested or not) 14 Table 1 Dimension example of the reference gauge and the plate for
14、the ceramic sleeve.6 Table 2 Dimension example of a commonly used ceramic alignment sleeve.7 Table A.1 Measured static fatigue parameters for zirconia sleeves 11 61300-2-24 IEC:2010(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST
15、 AND MEASUREMENT PROCEDURES Part 2-24: Tests Screen testing of ceramic alignment split sleeve by stress application FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Commit
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25、 publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. Internation
26、al Standard IEC 61300-2-24 has been prepared by subcommittee 86B: Fibre optic interconnecting devices and passive components, of IEC technical committee 86: Fibre optics. This second edition replaces the first edition published in 1999. This second edition constitutes a technical revision. Specific
27、technical changes involve the addition of a dimension example of the reference gauge and the plate for the ceramic sleeve and a commonly used ceramic alignment sleeve for the 1,25 mm ceramic sleeve. 4 61300-2-24 IEC:2010(E) The text of this standard is based on the following documents: FDIS Report o
28、n voting 86B/2967/FDIS 86B/3014/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of IEC 61300 series, publis
29、hed under the general title, Fibre optic interconnecting and passive components Basic test and measurement procedures, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “
30、http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page o
31、f this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 61300-2-24 IEC:2010(E) 5 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND
32、 MEASUREMENT PROCEDURES Part 2-24: Tests Screen testing of ceramic alignment split sleeve by stress application 1 Scope The purpose of this part of IEC 61300 is to identify weaknesses in a ceramic alignment split sleeve which could lead to early failure of the component. 2 General description Cerami
33、c alignment sleeves are important components often used in the adaptor of plug- adaptor-plug optical connector sets. By using the method described, the component is subjected to a proof stress greater than would be experienced under normal service conditions. This enables weak products to be screene
34、d out. 3 Apparatus The apparatus and arrangement necessary to perform this screening procedure are shown in Figure 1. The material needed consists of the following: a) a reference gauge made of ceramic with a sleeve-holding section, a tapered section and a stress-applying section. The diameter of ea
35、ch section is dependent on the dimensions of the product being screened. The length of the sleeve-holding section and the stress- applying section should be greater than the component being tested; b) plates A and B, each having a clearance hole in the centre to allow the plate to move a sample of a
36、 ceramic alignment split sleeve on the reference gauge. 6 61300-2-24 IEC:2010(E) Figure 1b Plate A and plate B Sleeve holding section Stress applying section Tapered section Fixed section A B C D H Figure 1a Reference gauge E G F IEC 1487/99 IEC 1488/99Figure 1 Apparatus used for screen testing of a
37、 ceramic alignment sleeve Table 1 shows the dimension of the reference gauge and the plate for the ceramic split sleeve. A dimension of the stress-applying section diameter (E) is shown for a commonly used ceramic alignment sleeve in Table 2. Table 1 Dimension example of the reference gauge and the
38、plate for the ceramic sleeve Reference For 1,25 mm gauge Dimension mm For 2,5 mm gauge Dimension mm Notes A 9 14 NOTE 2B 5 5 C 9 14 NOTE 2D NOTE 1 E 1,259 0 0,000 5 2,515 F NOTE3 G 20 20 H 2 2 NOTE 1 This diameter should be less than the inner diameter of the split sleeve. NOTE 2 Surface finish in t
39、his area Ra = 0,2 m. NOTE 3 Dimension F should be greater than dimension E, and less than sleeve D.61300-2-24 IEC:2010(E) 7 Table 2 Dimension example of a commonly used ceramic alignment sleeve Items For 1,25 mm Dimension mm For 2,5 mm Dimension mm Length 6,8 10,1 Outer diameter 1,62 3,2 Inner diame
40、ter (ref.) 1,246 2,49 Split section width 6,8 10,1 4 Procedure This test should be carried out under a 23 C 2 C environmental temperature condition. The procedure is as follows. a) Insert plate A into the reference gauge and set it at the fixed end of the reference gauge. b) Moisten the inside surfa
41、ce of a ceramic split sleeve sample with distilled water (for example using a cotton bud). Only touch the sleeve with suitable tools. c) The sample sleeve is inserted onto the sleeve-holding part and set just in front of the tapered part of the reference gauge. d) Insert plate B into the left-hand s
42、ide of the sample sleeve and move the sample sleeve onto the stress-applying part until the sample sleeve touches plate A (within approximately 1 s). e) The sample sleeve should be held for 3 s under the stressed state. f) After 3 s, stress applied to the sample sleeve is removed by moving plate A t
43、o the left- hand side (within approximately 1 s). g) In the course of the procedure from d) to f), samples without damage (breakage or crack) should be selected as acceptable sleeves. 5 Details to be specified The following details shall be specified depending on the sample sleeve size in the detail
44、 specification: diameter of sleeve-holding part of reference gauge (D); diameter of stress-applying part of reference gauge (E); length of sleeve-holding part (A) and stress-applying part (C); diameter of the center hole of plates A and B (F); deviations from test procedure. 8 61300-2-24 IEC:2010(E)
45、 Annex A (informative) Static fatigue for zirconia alignment sleeve A.1 Prediction of failure probability by static fatigue This annex applies primarily to 2,5 mm zirconia alignment sleeves supported by references 1 to 5 1) . For 1,25 mm zirconia sleeves, a comprehensive analysis is referenced 6 and
46、 the strength distribution is shown in Figure A.6. Micro-cracks essentially exist on the surface or inside of ceramics. Therefore, fracture due to static fatigue occurs in ceramics under lower stress than the characteristic strength of the materials because of crack propagation in ceramic materials
47、1 2. Assurance of reliable optical fibre connections requires the prediction of failure probability of the zirconia sleeves under working stress needed to align the ferrules. Assuming aligned ferrules of optical connectors, the zirconia sleeves are allowed to stand under a constant stress, as workin
48、g stress a . Based on the theories of Weibull statistics and slow crack growth for brittle materials, cumulative failure probability F of the zirconia sleeves suffering from working stress is given by the following equation: ln ln 1 1 1 ln + = a N a t N m F(A.1) with 2) ( / 0 e N m m V ) 2 ( 2 ) 2 (
49、 2 N IC K AY N where t ais the working time during which the working stress ais applied; m, V eand 0are the Weibull modulus, effective volume, and normalization constant to express the failure probability by the Weibull statistics theory, respectively; Y is the geometry constant; K ICis the critical stress intensity factor; A and N are crack propagation constants
