1、 TIA DOCUMENT FOTP-89 Optical Fiber Cable Jacket Elongation and Tensile Strength TIA-455-89-B (Revision of TIA/EIA-455-89-A) JULY 1998 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Telecommunications Industry Association represents the communications sector of NOTICE TIA Engineering Standards and Publ
2、ications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for their particula
3、r need. The existence of such Publications shall not in any respect preclude any member or non-member of TIA from manufacturing or selling products not conforming to such Publications. Neither shall the existence of such Documents preclude their voluntary use by non-TIA members, either domestically
4、or internationally. TIA DOCUMENTS TIA Documents contain information deemed to be of technical value to the industry, and are published at the request of the originating Committee without necessarily following the rigorous public review and resolution of comments which is a procedural part of the dev
5、elopment of a American National Standard (ANS). Further details of the development process are available in the TIA Engineering Manual, located at http:/www.tiaonline.org/standards/sfg/engineering_manual.cfm TIA Documents shall be reviewed on a five year cycle by the formulating Committee and a deci
6、sion made on whether to reaffirm, revise, withdraw, or proceed to develop an American National Standard on this subject. Suggestions for revision should be directed to: Standards othewise, record sufficient data to determine the yield point and break point. If no extension-indicating mechanism is us
7、ed, stop the testing machine crosshead at appropriate load or extension points and measure the extension of the gauge length. Note - See ASTM D 638 for guidance in interpreting yield and break characteristics. 4 STD-EIA TIA/EIA-455-89B-ENGL L998 3234b00 0621988 323 TINEIA-455-896 5.8 Discard specime
8、ns that break at some obvious fortuitous flaw. Record the load and extension of the gauge length at yield (if any) and at the breaking . point. A yield or break outside the marked area shall be considered as invalid test information. 6 Calculations or interpretation of results 6.1 Elongation: If the
9、 sample gives a yield load that is larger than the load at break, calculate the “percent elongation at yield“; othenrvise, calculate the “percent elongation at break. Do this by reading the change in gauge length at the applicable strain, dividing by the original gauge length and multiplying by 100:
10、 x100 (1) 1 Final Gauge Length - Original Gauge Length Original Gauge Length Percent Elongation = 6.2 original minimum cross sectional area recorded under 5.2 or 5.3 for the sample. Tensile strength: Calculate the tensile strength by dividing the maximum load by the Maximum Load Minimum Cross Sectio
11、nal Area Tensile Strength = 6.3 ASTM D 638. Precision and bias: The precision and bias of these methods are in accordance with 7 Documentation Report the following information for each specimen tested or set of tests, as appropriate: 7.1 Title and date of test. 7.2 Equipment used and date of calibra
12、tion. 7.3 Signature or certification of the responsible test personnel. For U. S. Military applications only, include the name of the actual test personnel. 7.4 Source of sample or cable identification. Note - When the sample is from a cable having a bonded jacket andlor embedded strength members, s
13、pecify whether the sample was from a cable jacket or was manufactured or molded. 7.5 Conditioning procedure. ASTM D 638, 8.3. ASTM D 638, Clause i i and Annex A. 5 7.6 Specimen configuration (tubular or dumbbell). 7.7 Test conditions, temperature of sample, and speed of crosshead. 7.8 Percent elonga
14、tion. 7.9 Tensile strength. 7.1 O Other pertinent data. 8 Specification information Specify the following in the detail specification: 8.1 elongation or tensile strength, or both, are required. A reference to this test procedure, together with a statement indicating whether 8.2 Jacket or jackets to
15、be tested. 8.3 Number of specimens to be tested. 8.4 Specimen preparation: tubular or dumbbell; manufactured or molded. 8.5 Specimen dimensions, if other than those given in the procedure. 8.6 Conditioning requirements and test conditions, if other than those given in the proced Ure. 8.7 Crosshead s
16、peed. 8.8 8.9 Acceptance or failure criteria. Any special precautions to be taken with the specimens (see 3.5). 6 STD-EIA TIA/EIA-455-89B-ENGL 1998 9 3234b00 Ob21990 TBL TINEIA-455-896 Figure 1 Tubular test specimen 7 STD-EIA TIA/EIA-455-89B-ENGL L998 W 3234h00 Oh2L79L 9L8 M TWEIA-455-89B 115 mm min
17、 (4.50 in) L 19 mm -7 min 1.30 in) 33 mm r 6.0 mm .75 in1 i 12.5 in) DISTANCE BETWEEN GR i PS -T NOTE 1 - Refer to ASTM D 638, figure 1, for tolerances. NOTE 2 - Thickness, T, is the thickness of the sample provided. For molded samples, see ASTM D 638. Figure 2 Dumbbell test specimen (Ref: ASTM D 63
18、8, Type IV) 8 STD*EIA TIA/EIA-455-89B-ENGL 1998 W 3234600 0621992 54 TiNEIA-455-89B Annex A (informative) Comparison between this FOTP and IEC or ITU-T requirements As of the date of publication the following test methods have been determined to be comparable to FOTP-89: A.l ITU-T - None. A.2 IEC -
19、IEC 81 1-1-1, Common test methods for insulating and sheathing materials of electric cables - Part 7: Methods for general application - Section 7: Measurement of thickness and overall dimensions - Tests for determining the mechanical properties, subclause 9.2, “Tensile testing”, has a procedure that is substantially the same as that of ASTM D 638, from which this FOTP was drawn. Therefore, tests per FOTP-89 may be judged to conform to this IEC test method. The reverse may not be the case due to differences in specimens or test attributes. 9
